tender book.doc · web viewdesign, supply & delivery of 33kv out door type ct & pt, 36kv...

ORISSA INDUSTRIAL INFRASTRUCTURE DEVELOPMENT CORPORATION (IDCO)

IDCO TOWER JANPATH, BHUBANESWAR-22

TENDERTENDERForFor

DESIGN, SUPPLY & DELIVERY OF 33KV OUT DOOR TYPE CT & PT, 36KVDESIGN, SUPPLY & DELIVERY OF 33KV OUT DOOR TYPE CT & PT, 36KV

1500MVA OUTDOOR TYPE VCB, 33KV FEEDER PANEL, 11KV INDOOR TYPE1500MVA OUTDOOR TYPE VCB, 33KV FEEDER PANEL, 11KV INDOOR TYPE

800MVA VCB FOR 33/11KV, 2 X 8 MVA SUBSTATION AT GROWTH CENTRE,800MVA VCB FOR 33/11KV, 2 X 8 MVA SUBSTATION AT GROWTH CENTRE,

JHARSUGUDA. JHARSUGUDA.

Estimated CostEstimated Cost :: Rs. 40.98 lakhsRs. 40.98 lakhs

Time of CompletionTime of Completion : : 3 (Three) months3 (Three) months

Cost of Tender PaperCost of Tender Paper :: Rs. 6000.00 + VAT @ 4%Rs. 6000.00 + VAT @ 4%

EMD to be deposited withEMD to be deposited with :: Rs. 1% of the quoted valueRs. 1% of the quoted value

Tender Specification NoTender Specification No : :

Date of saleDate of sale :: Dtd: 14.02.11 to 28.02.11Dtd: 14.02.11 to 28.02.11

With in 11.00hrs to 17.00hrs.With in 11.00hrs to 17.00hrs.

Date of ReceiptDate of Receipt :: Dtd: 08.03.11 up to 17.00hrs.Dtd: 08.03.11 up to 17.00hrs.

Date of openingDate of opening :: Dtd: 10.03.11 at 16.00hrs.Dtd: 10.03.11 at 16.00hrs.

M.R. No & dateM.R. No & date ::

Issued toIssued to :: M/sM/s..

Sir,Sir,

1.1. After careful examination of the above specification together with the general conditions referredAfter careful examination of the above specification together with the general conditions referred

therein, we hereby offer to supply, erect, test and commission the materials covered thereon completetherein, we hereby offer to supply, erect, test and commission the materials covered thereon complete

in all respects as per specification and general conditions at the rate quoted in attached schedule ofin all respects as per specification and general conditions at the rate quoted in attached schedule of

prices of the tender. prices of the tender.

2.2. Our offer shall be valid up to 180 days from the date of opening of Price Bid of the tender.Our offer shall be valid up to 180 days from the date of opening of Price Bid of the tender.

3.3. We hereby undertake to have the materials delivered/ work executed within the time specified inWe hereby undertake to have the materials delivered/ work executed within the time specified in

the tender and to adhere to the quantity to be supplied at destinations to be prescribed by the owner.the tender and to adhere to the quantity to be supplied at destinations to be prescribed by the owner.

4.4. We hereby guarantee the technical particulars given in the tender, supported with necessary testWe hereby guarantee the technical particulars given in the tender, supported with necessary test

reports from concerned authorities.reports from concerned authorities.

5.5. We certify to have purchased a copy of the tender papers by remitting Rs._________ (RupeesWe certify to have purchased a copy of the tender papers by remitting Rs._________ (Rupees

_______________________________________) only by cash and this has been acknowledged by you_______________________________________) only by cash and this has been acknowledged by you

in your money receipt Noin your money receipt No dated dated ..

6.6. We agree to furnish the security deposit in the manner to be decided by your competent authority.We agree to furnish the security deposit in the manner to be decided by your competent authority.

We remain.We remain.

Yours faithfully,Yours faithfully,

(Signature)(Signature)

(With seal)(With seal)

Note: Note: This form should be duly filled in by the tenderer and returned to the Divisional Head (Elect),This form should be duly filled in by the tenderer and returned to the Divisional Head (Elect),

IDCO Bhubaneswar - 751 022 along with the tender.IDCO Bhubaneswar - 751 022 along with the tender.

ORISSA INDUSTRIAL INFRASTRUCTURE DEVELOPMENT CORPORATION (IDCO)ORISSA INDUSTRIAL INFRASTRUCTURE DEVELOPMENT CORPORATION (IDCO)IDCO TOWER JANPATH, BHUBANESWAR-10IDCO TOWER JANPATH, BHUBANESWAR-10

(IDCO/QP/ELECT/F-05)(IDCO/QP/ELECT/F-05)TENDER CALL NOTICETENDER CALL NOTICE

NO: BBSR/ELECT/E-1719/10-11/ 445NO: BBSR/ELECT/E-1719/10-11/ 445 DATE: 09.02.2011 DATE: 09.02.2011

1.1. The Divisional Head (Elect), invites sealed tenders from reputed manufacturers /The Divisional Head (Elect), invites sealed tenders from reputed manufacturers / authorised dealers having CPRI test certificate only of same capacity or higher forauthorised dealers having CPRI test certificate only of same capacity or higher for ““Design, supply & delivery of 33KV outdoor type CT & PT, 36KV outdoor typeDesign, supply & delivery of 33KV outdoor type CT & PT, 36KV outdoor type VCB, 33KV feeder panel, 11KV indoor type VCB for 33/11KV, 2 x 8 MVAVCB, 33KV feeder panel, 11KV indoor type VCB for 33/11KV, 2 x 8 MVA Substation at Growth Centre, JharsugudaSubstation at Growth Centre, Jharsuguda”. The tender documents will be issued on”. The tender documents will be issued on production of following documents.production of following documents.

a.a. Copy of valid VAT registration certificate. Copy of valid VAT registration certificate. b.b. Copy of valid PAN number.Copy of valid PAN number.c.c. Copy of documents in support of orders already executed along with user’sCopy of documents in support of orders already executed along with user’s

performance certificate in support of satisfactory performance and CPRI certificateperformance certificate in support of satisfactory performance and CPRI certificate & service facility at Cuttack / Bhubaneswar.& service facility at Cuttack / Bhubaneswar.

2.2. Bidding documents may be purchased from the office of the undersigned from the dateBidding documents may be purchased from the office of the undersigned from the date 14.02.1114.02.11to to 28.02.1128.02.11 within 11.00 hours to 17.00 hours within 11.00 hours to 17.00 hours on payment of non-refundableon payment of non-refundable amount as indicated in the table below in the shape of cash. The technical specification &amount as indicated in the table below in the shape of cash. The technical specification & qualifying, criteria can be seen from the tender document available at out web site.qualifying, criteria can be seen from the tender document available at out web site.

3.3. The document can also be downloaded from our Website at The document can also be downloaded from our Website at www.idco.inwww.idco.in In that case the In that case the cost of the bid document shall be submitted along with the tender in the form of demandcost of the bid document shall be submitted along with the tender in the form of demand draft drawn in favour of “Orissa Industrial Infrastructure Development Corporation”draft drawn in favour of “Orissa Industrial Infrastructure Development Corporation” payable at Bhubaneswar in a separate cover. The offer shall be considered only if thepayable at Bhubaneswar in a separate cover. The offer shall be considered only if the authority is satisfied about the fulfilment of eligibility criteria by the firm. IDCO shall notauthority is satisfied about the fulfilment of eligibility criteria by the firm. IDCO shall not be responsible for any delay/ difficulty/ inaccessibility of the downloading facility. In casebe responsible for any delay/ difficulty/ inaccessibility of the downloading facility. In case of any discrepancy between the tender documents downloaded from Internet and theof any discrepancy between the tender documents downloaded from Internet and the master copy available in the office, the master copy will prevail. No claim on this accountmaster copy available in the office, the master copy will prevail. No claim on this account will be entertained.will be entertained.

4.4. Bids must be accompanied by Earnest Money in the shape of Demand Draft for an amountBids must be accompanied by Earnest Money in the shape of Demand Draft for an amount as given in the table below payable at Bhubaneswar and drawn in favour of as given in the table below payable at Bhubaneswar and drawn in favour of “Orissa“Orissa Industrial Infrastructure Development Corporation”.Industrial Infrastructure Development Corporation”. Bids without required amount of Bids without required amount of Earnest Money will not be taken into consideration.Earnest Money will not be taken into consideration.

5.5. The sealed bids must consists of 3 (three) parts i.e. (i) Commercial Bid (ii) Technical BidThe sealed bids must consists of 3 (three) parts i.e. (i) Commercial Bid (ii) Technical Bid (iii) Price Bid. Bid must be delivered to the office of the undersigned on or before the(iii) Price Bid. Bid must be delivered to the office of the undersigned on or before the 17.00 Hrs17.00 Hrs of dated of dated 08.03.1108.03.11 by Registered post / speed post only. by Registered post / speed post only. The technical &The technical & commercial bids will be opened on dtd.commercial bids will be opened on dtd. 10.03.11 10.03.11 at 16.00 Hrs at 16.00 Hrs in presence of the bidders in presence of the bidders or their authorised representative, if any. The price bids of only the qualified bidder will beor their authorised representative, if any. The price bids of only the qualified bidder will be opened on a later date. If the office happens to be closed on the date of submission of theopened on a later date. If the office happens to be closed on the date of submission of the bids, the bids will be received and opened on the next working day of opening of the officebids, the bids will be received and opened on the next working day of opening of the office at the same time and venue. Other details can be seen in the bidding documents.at the same time and venue. Other details can be seen in the bidding documents.

6.6. The authority reserves the right to reject or accept any or all the bids or parts withoutThe authority reserves the right to reject or accept any or all the bids or parts without assigning any reason thereof.assigning any reason thereof.

http://www.idco.in/

7.7. In case of any difficulty, please contact Er. B. Rath, Jt. Manager. (Elect) over telephoneIn case of any difficulty, please contact Er. B. Rath, Jt. Manager. (Elect) over telephone No: 0674-2541766 during office hours.No: 0674-2541766 during office hours.

SlSl NoNo Name of the WorkName of the Work Estt.Estt.

AmountAmount Bid SecurityBid Security Cost of BidCost of Bid DocumentsDocuments

StipulatedStipulated Period ofPeriod of

completioncompletion

1.1. Design, supply & delivery of 33KVDesign, supply & delivery of 33KV

outdoor type CT & PT, 36KV 1500MVAoutdoor type CT & PT, 36KV 1500MVA

outdoor type VCB, 33KV feeder panel,outdoor type VCB, 33KV feeder panel,

11KV indoor type 750 MVA VCB for11KV indoor type 750 MVA VCB for

33/11KV, 2 x 8 MVA Substation at33/11KV, 2 x 8 MVA Substation at

Growth Centre, Jharsuguda. Growth Centre, Jharsuguda.

40.9840.98

LakhsLakhs

1% of1% of

quoted valuequoted value

Rs. 6000/-Rs. 6000/-

+ VAT @+ VAT @

4% 4%

3 (Three)3 (Three)

months.months.

Divisional Head (Elect)Divisional Head (Elect)

Memo No: / dtd: Memo No: / dtd: Copy forwarded to Manager (PR), IDCO, Bhubaneswar with a request for publication ofCopy forwarded to Manager (PR), IDCO, Bhubaneswar with a request for publication of

the Tender Call Notice in two dailies on or before dt: 14.02.11. The copies of the paper publicationthe Tender Call Notice in two dailies on or before dt: 14.02.11. The copies of the paper publication may please be furnished to this office for record.may please be furnished to this office for record.


Memo No: / dtd: Memo No: / dtd: Copy to C.G.M. (P&C), IDCO, Bhubaneswar for information and necessary action.Copy to C.G.M. (P&C), IDCO, Bhubaneswar for information and necessary action.

Divisional Head (Elect)Divisional Head (Elect)Memo No: / dtd: Memo No: / dtd:

Copy to Dy. General Manager (MIS), IDCO, Bhubaneswar for information and necessaryCopy to Dy. General Manager (MIS), IDCO, Bhubaneswar for information and necessary action. The copy of the tender call notice contained in the floppy enclosed may please be includedaction. The copy of the tender call notice contained in the floppy enclosed may please be included in one Website of IDCO.in one Website of IDCO.


Memo No: / dtd: Memo No: / dtd: Copy to Notice Board. IDCO / Dy. Manager (Finanace), Electrical Division, IDCO,Copy to Notice Board. IDCO / Dy. Manager (Finanace), Electrical Division, IDCO,

Bhubaneswar for information and necessary action. Bhubaneswar for information and necessary action.


COMMERCIAL TERMS & CONDITIONSCOMMERCIAL TERMS & CONDITIONS

The Bidder shall tabulate the commercial terms and conditions of the tender in the following.The Bidder shall tabulate the commercial terms and conditions of the tender in the following. Additional sheets may be attached, if required. Additional sheets may be attached, if required.

1.01.0 Bidder’s Complete Company NameBidder’s Complete Company Name ::

2.02.0 Bidder’s Proposal NumberBidder’s Proposal Number ::

3.03.0 Bidder’s Proposal DateBidder’s Proposal Date ::

4.04.0 Name and Designation of the Officer of the Bidder toName and Designation of the Officer of the Bidder to whom all references shall be made for expeditiouswhom all references shall be made for expeditious technical co-ordination.technical co-ordination.

::

5.05.0 Bidder’s Proposal ValidityBidder’s Proposal Validity ::

a)a) Is the Bidder’s proposal validity as per owner’sIs the Bidder’s proposal validity as per owner’s specification acceptable? specification acceptable?

:: (Yes / No) (Yes / No)

b)b) If not, specify the terms of Validity of Bidder’sIf not, specify the terms of Validity of Bidder’s Proposal from the date of opening of Price BidProposal from the date of opening of Price Bid

6.06.0 Delivery and completionDelivery and completion

a)a) Is the terms of Delivery / Completion Period as perIs the terms of Delivery / Completion Period as per owner’s specification acceptable? owner’s specification acceptable?


b)b) If not, specify the terms of Delivery / CompletionIf not, specify the terms of Delivery / Completion Period (in months) from the date of issue of Letter ofPeriod (in months) from the date of issue of Letter of IntentIntent

i)i) Supply of material (Delivery)Supply of material (Delivery) ::

ii)ii) Installation, testing and commissioning of worksInstallation, testing and commissioning of works complete in all respect. (Completion)complete in all respect. (Completion)

::

c)c) Whether the Delivery / Completion Period isWhether the Delivery / Completion Period is guaranteed under Penalty / Liquidated Damage as perguaranteed under Penalty / Liquidated Damage as per GCC? GCC?


7.07.0 Terms of Payment: Terms of Payment:

a)a) Are Terms of payment as per owner’s specificationAre Terms of payment as per owner’s specification acceptable? acceptable?


b)b) If not, specify the terms of paymentIf not, specify the terms of payment ::

8.08.0 Whether EMD deposited? Whether EMD deposited? :: (Yes / No) (Yes / No)

If so, give reference.If so, give reference. ::

If not, give reasons.If not, give reasons. ::

9.09.0 Whether registered with D.G.S. & D / E.P.M. / AnyWhether registered with D.G.S. & D / E.P.M. / Any other such Organisation? other such Organisation?


If so, Give details? (Enclose Photostat copy of theIf so, Give details? (Enclose Photostat copy of the reference letter)reference letter)

::

10.010.0 Whether Photocopy of following currently validWhether Photocopy of following currently valid documents furnished? documents furnished?

(a)(a) Orissa Sales Tax Registration CertificateOrissa Sales Tax Registration Certificate :: (Yes / No) (Yes / No)

No of Corrections:Page No - 5 - Signature of the Tenderer

(b)(b) Orissa Sales Tax Clearance CertificateOrissa Sales Tax Clearance Certificate :: (Yes / No) (Yes / No)

(c)(c) Income Tax Clearance CertificateIncome Tax Clearance Certificate :: (Yes / No) (Yes / No)

(d)(d) Provident Fund Registration CertificateProvident Fund Registration Certificate :: (Yes / No) (Yes / No)

11.011.0 Conformance: Conformance:

a)a) Whether the materials offered are strictly inWhether the materials offered are strictly in accordance with owner’s specification? accordance with owner’s specification?


b)b) If not, have deviation sheets been duly filled up? If not, have deviation sheets been duly filled up? :: (Yes / No) (Yes / No)

12.012.0 Is the Performance Guarantee period specified in GCCIs the Performance Guarantee period specified in GCC accepted? accepted?


If not, specify the Performance Guarantee period (inIf not, specify the Performance Guarantee period (in months)months)

a)a) From the date of commissioning at siteFrom the date of commissioning at site ::

b)b) From the date of despatchFrom the date of despatch ::

13.13. Whether after sales service facilities are available atWhether after sales service facilities are available at Bhubaneswar. Bhubaneswar.


a)a) If Yes, give address & detailsIf Yes, give address & detailsb)b) If No, location nearest service centerIf No, location nearest service center14.14. Whether tenderer is a manufacturer of approved make Whether tenderer is a manufacturer of approved make

of materials? of materials? : : (Yes / No)(Yes / No)


GUIDELINES ON BANK GUARANTEEGUIDELINES ON BANK GUARANTEE

The following points are required to be noted by the party while submitting any Bank Guarantee.The following points are required to be noted by the party while submitting any Bank Guarantee.

1.1. Non-judicial stamp papers on which Bank Guarantee is typed must be purchased in the name ofNon-judicial stamp papers on which Bank Guarantee is typed must be purchased in the name of

the issuing Bank.the issuing Bank.

2.2. The Bank Guarantee must be executed on non-judicial stamp paper of the value applicable in theThe Bank Guarantee must be executed on non-judicial stamp paper of the value applicable in the

State, where the Bank Guarantee has been executed.State, where the Bank Guarantee has been executed.

3.3. The Bank Guarantee must be furnished in the given proforma by any Nationalised Bank andThe Bank Guarantee must be furnished in the given proforma by any Nationalised Bank and

made operable at Bhubaneswarmade operable at Bhubaneswar only only ..

4.4. The Bank Guarantee must be executed within six months from the date of purchase of non-The Bank Guarantee must be executed within six months from the date of purchase of non-

judicial stamp papers.judicial stamp papers.

5.5. The Bank Guarantee should never be typed on both sides of the non-judicial stamp papers.The Bank Guarantee should never be typed on both sides of the non-judicial stamp papers.

6.6. The Bank Officer executing the Bank Guarantee must furnish the number and date of power ofThe Bank Officer executing the Bank Guarantee must furnish the number and date of power of

Attorney / Delegation of Authority by which, he has been authorised to issue the Bank Guarantee.Attorney / Delegation of Authority by which, he has been authorised to issue the Bank Guarantee.

7.7. The person executing the Bank Guarantee must write his full name and designation.The person executing the Bank Guarantee must write his full name and designation.

8.8. The person, executing the Bank Guarantee, must sign in all pages of Bank Guarantee.The person, executing the Bank Guarantee, must sign in all pages of Bank Guarantee.

9.9. All cuttings / additions / over writings in inks must be authenticated by the person executing theAll cuttings / additions / over writings in inks must be authenticated by the person executing the

Bank Guarantee by his signature and seal of the Bank.Bank Guarantee by his signature and seal of the Bank.

10.10. Execution of Bank Guarantee must be witnessed by two persons.Execution of Bank Guarantee must be witnessed by two persons.

11.11. Witnesses must mention their full name and address.Witnesses must mention their full name and address.

12.12. Three months time must be given to file claim or suit from the date of expiry of the BankThree months time must be given to file claim or suit from the date of expiry of the Bank

GuaranteeGuarantee..

13.13. The Act, under which issuing Bank is constituted, should be correctly given.The Act, under which issuing Bank is constituted, should be correctly given.

14.14. If EMD is deposited in shape of Bank Guarantee, it should be valid, operative and irrecoverableIf EMD is deposited in shape of Bank Guarantee, it should be valid, operative and irrecoverable

till 60 (sixty days) after the validity of offer.till 60 (sixty days) after the validity of offer.

15.15. All dates should be carefully and correctly put in the Bank Guarantee.All dates should be carefully and correctly put in the Bank Guarantee.


SECTION - 1SECTION - 1(Formats & Deviations)(Formats & Deviations)

FORMAT FOR BANK GUARANTEE AS EMDFORMAT FOR BANK GUARANTEE AS EMDDatedDated

Bank Guarantee No.Bank Guarantee No.Ref. No:Ref. No:ToTo

M/s. Orissa Industrial Infrastructure Development Corporation,M/s. Orissa Industrial Infrastructure Development Corporation,IDCO, IDCO Towers, Janpath,IDCO, IDCO Towers, Janpath,Bhubaneswar - 7, Bhubaneswar - 7, Dist. Khurda (Orissa)Dist. Khurda (Orissa)Dear Sirs,Dear Sirs,In consideration of Orissa Industrial Infrastructure Development Corporation, having its RegisteredIn consideration of Orissa Industrial Infrastructure Development Corporation, having its Registered

Office at IDCO Towers, Janpath, Bhubaneswar (hereinafter called the ‘Owner’ which expression shallOffice at IDCO Towers, Janpath, Bhubaneswar (hereinafter called the ‘Owner’ which expression shall

unless repugnant to the subject or context include its successors and assigns) having issued Noticeunless repugnant to the subject or context include its successors and assigns) having issued Notice

Inviting Tender for “Inviting Tender for “DESIGN, SUPPLY & DELIVERY OF 33KV OUTDOOR TYPE CT & PT, 36KVDESIGN, SUPPLY & DELIVERY OF 33KV OUTDOOR TYPE CT & PT, 36KV

1500MVA OUTDOOR TYPE VCB, 33KV FEEDER PANEL, 11KV INDOOR TYPE 800MVA VCB FOR1500MVA OUTDOOR TYPE VCB, 33KV FEEDER PANEL, 11KV INDOOR TYPE 800MVA VCB FOR

33/11KV, 2 X 8 MVA SUBSTATION AT GROWTH CENTRE, JHARSUGUDA33/11KV, 2 X 8 MVA SUBSTATION AT GROWTH CENTRE, JHARSUGUDA” and M/s. ” and M/s.

having its Registered Head Office at having its Registered Head Office at (hereinafter called the(hereinafter called the

‘Tenderer’) who wished to participate in the said tender for “‘Tenderer’) who wished to participate in the said tender for “DESIGN, SUPPLY & DELIVERY OF 33KVDESIGN, SUPPLY & DELIVERY OF 33KV

OUTDOOR TYPE CT & PT, 36KV 1500MVA OUTDOOR TYPE VCB, 33KV FEEDER PANEL, 11KVOUTDOOR TYPE CT & PT, 36KV 1500MVA OUTDOOR TYPE VCB, 33KV FEEDER PANEL, 11KV

INDOOR TYPE 800MVA VCB FOR 33/11KV, 2 X 8 MVA SUBSTATION AT GROWTH CENTRE,INDOOR TYPE 800MVA VCB FOR 33/11KV, 2 X 8 MVA SUBSTATION AT GROWTH CENTRE,

JHARSUGUDAJHARSUGUDA” and the owner, as a special favour, have agreed to accept an irrevocable and” and the owner, as a special favour, have agreed to accept an irrevocable and

unconditional Bank Bid Guarantee executed by any Nationalised Bank operable at its Bhubaneswarunconditional Bank Bid Guarantee executed by any Nationalised Bank operable at its Bhubaneswar

Branch only for an amount of Rs.Branch only for an amount of Rs. ______ valid up to valid up to on behalf of the tenderer in on behalf of the tenderer in

lieu of Cash Deposit required to be made by the Tenderer, as a condition precedent for participation inlieu of Cash Deposit required to be made by the Tenderer, as a condition precedent for participation in

the said tender.the said tender.

We the We the (Bank & Address) incorporated under (Bank & Address) incorporated under law and having our Registered law and having our Registered

Head Office at Head Office at and one of our branches at and one of our branches at (Bhubaneswar Branch (Bhubaneswar Branch

Address) do hereby unconditionally and irrevocably guarantee and undertake to pay to the ‘Owner’Address) do hereby unconditionally and irrevocably guarantee and undertake to pay to the ‘Owner’

immediately on demand at our Bhubaneswar Branch without any demur reservation, protest, contest immediately on demand at our Bhubaneswar Branch without any demur reservation, protest, contest

and recourse to the extent of the said sum of Rs.and recourse to the extent of the said sum of Rs. (Rupees (Rupees ) only. Any) only. Any

such claim/ demand made by the said ‘Owner’ on us shall be conclusive and binding on us irrespectivesuch claim/ demand made by the said ‘Owner’ on us shall be conclusive and binding on us irrespective

of any dispute or differences raised by the tenderer. This guarantee shall be irrevocable and shall remainof any dispute or differences raised by the tenderer. This guarantee shall be irrevocable and shall remain

valid up to valid up to . If any further extension of this guarantee is required, the same shall be extended. If any further extension of this guarantee is required, the same shall be extended


to such required period on receiving instruction from the Tenderer on whose behalf this guarantee isto such required period on receiving instruction from the Tenderer on whose behalf this guarantee is

issued.issued.

We, the said Bank, lastly undertake not to revoke this guarantee during its currency except withWe, the said Bank, lastly undertake not to revoke this guarantee during its currency except with

the previous consent of the Owner in writing and agree that any change in the constitution of the saidthe previous consent of the Owner in writing and agree that any change in the constitution of the said

tenderer or the said Bank shall not discharge our liability here under.tenderer or the said Bank shall not discharge our liability here under.

I witness where of, the Bank, through its authorised offices has set its hand and stamp on thisI witness where of, the Bank, through its authorised offices has set its hand and stamp on this

______ day of ______ day of 2010 at 2010 at ..

Witness :Witness :

SignatureSignature (Signature)(Signature)

Name :Name : Name :Name :

Designation with Bank Stamp.Designation with Bank Stamp.

Official Address :Official Address :

Attorney as per power of Attorney as per power of

Attorney No. Attorney No.

Date. Date.

Note: Note: The stamp papers of Rupees forty only shall be purchased in the name of “Bid Guarantee issuingThe stamp papers of Rupees forty only shall be purchased in the name of “Bid Guarantee issuing

Bank”.Bank”.


DEVIATION SHEET: PART - ADEVIATION SHEET: PART - A

If the proposal has got any deviation from the Technical Specification, the Bidder shall tabulateIf the proposal has got any deviation from the Technical Specification, the Bidder shall tabulate

these deviations clause by clause in this Schedule. Additional sheets may be attached, if required.these deviations clause by clause in this Schedule. Additional sheets may be attached, if required.

Clause No.Clause No. DeviationsDeviations


DEVIATION SHEET: PART - BDEVIATION SHEET: PART - B

If the proposal has got any deviation from the tendering conditions and the General ConditionsIf the proposal has got any deviation from the tendering conditions and the General Conditions

of Contract, the Bidder shall tabulate these deviations clause by clause in this Schedule. Additionalof Contract, the Bidder shall tabulate these deviations clause by clause in this Schedule. Additional

sheets may be attached, if required.sheets may be attached, if required.

Clause No.Clause No. DeviationsDeviations


DEVIATION SHEET (IN PRICE): PART – CDEVIATION SHEET (IN PRICE): PART – C

Against each and every deviation from the Technical Specification as enumerated in DeviationAgainst each and every deviation from the Technical Specification as enumerated in Deviation

Sheet: Part - A, the amount by which the Bid Price will thereby be increased or decreased shall beSheet: Part - A, the amount by which the Bid Price will thereby be increased or decreased shall be

intimated clause by clause in this Schedule. In case the amount is not mentioned in the Schedule againstintimated clause by clause in this Schedule. In case the amount is not mentioned in the Schedule against

any of the deviations mentioned in Deviation Sheet: Part - A, it will be taken for granted that the sameany of the deviations mentioned in Deviation Sheet: Part - A, it will be taken for granted that the same

does not involve any change in the Bid Price. Additional sheets may be attached, if required.does not involve any change in the Bid Price. Additional sheets may be attached, if required.

Clause No.Clause No. Deviation if anyDeviation if anyAmount by which the Bid Price will changeAmount by which the Bid Price will change

Increase (Rs.)Increase (Rs.) Decrease (Rs.)Decrease (Rs.)


GENERAL CONDITIONS OF CONTRACTGENERAL CONDITIONS OF CONTRACT

(For supply of Electrical Materials)(For supply of Electrical Materials)

1.01.0 General Instructions:General Instructions:

The work put to tender pertains to supply of Electrical items as detailed in technical specificationThe work put to tender pertains to supply of Electrical items as detailed in technical specification

and price schedule required for and price schedule required for Design, supply & delivery of 33KV outdoor type CT & PT,Design, supply & delivery of 33KV outdoor type CT & PT,

36KV 1500MVA outdoor type VCB, 33KV feeder panel, 11KV indoor type 800MVA VCB36KV 1500MVA outdoor type VCB, 33KV feeder panel, 11KV indoor type 800MVA VCB

for 33/11KV, 2 x 8 MVA Substation at Growth Centre, Jharsugudafor 33/11KV, 2 x 8 MVA Substation at Growth Centre, Jharsuguda .. The tenderer shall The tenderer shall

ensure to follow the instructions given hereunder failing which; the tenders shall be liable forensure to follow the instructions given hereunder failing which; the tenders shall be liable for

rejection.rejection.

2.02.0 Scope of Proposal:Scope of Proposal:The scope of work in brief shall include design, manufacture, inspection, supply, loading atThe scope of work in brief shall include design, manufacture, inspection, supply, loading at

factory, transportation to site / unloading at site, insurance, taxes, duties including guarantee andfactory, transportation to site / unloading at site, insurance, taxes, duties including guarantee and

after sales service obligations of after sales service obligations of Design, supply & delivery of 33KV outdoor type CT & PT,Design, supply & delivery of 33KV outdoor type CT & PT,

36KV 1500MVA outdoor type VCB, 33KV feeder panel, 11KV indoor type 800MVA VCB36KV 1500MVA outdoor type VCB, 33KV feeder panel, 11KV indoor type 800MVA VCB

for 33/11KV, 2 x 8 MVA Substation at Growth Centre, Jharsugudafor 33/11KV, 2 x 8 MVA Substation at Growth Centre, Jharsuguda in conformity to the in conformity to the

enclosed technical specification.enclosed technical specification.

3.03.0 Technical Eligibility Criteria for Bidders:Technical Eligibility Criteria for Bidders:The bidder shall be a manufacturer of The bidder shall be a manufacturer of 33KV outdoor type CT & PT, 36KV 1500MVA33KV outdoor type CT & PT, 36KV 1500MVA

outdoor type VCB, 33KV feeder panel, 11KV indoor type 800MVA VCBoutdoor type VCB, 33KV feeder panel, 11KV indoor type 800MVA VCB or higher rating or higher rating

33KV outdoor type CT & PT, 36KV 1500MVA outdoor type VCB, 33KV feeder panel,33KV outdoor type CT & PT, 36KV 1500MVA outdoor type VCB, 33KV feeder panel,

11KV indoor type 800MVA VCB11KV indoor type 800MVA VCB. The bidder must possess Type test certificates for the said. The bidder must possess Type test certificates for the said

rating or higher capacity of VCB.rating or higher capacity of VCB.

4.04.0 Submission of Tender:Submission of Tender:Each Bidder shall submit only one Bid either by himself, or as a partner in a Joint Venture. AEach Bidder shall submit only one Bid either by himself, or as a partner in a Joint Venture. A

Bidder who submits or participates in more than one Bid for the same item, either individually orBidder who submits or participates in more than one Bid for the same item, either individually or

jointly with some other will cause all those Bids to be rejected.jointly with some other will cause all those Bids to be rejected.

Tenderers are advised to fill up the prices only in the prescribed format given in this document.Tenderers are advised to fill up the prices only in the prescribed format given in this document.

The The tender shall be submitted in tender shall be submitted in threethree parts parts, each part being sealed in separate envelope., each part being sealed in separate envelope.

Part IPart I will contain the letter of application, proposal particulars, deviations, List of testing facilities will contain the letter of application, proposal particulars, deviations, List of testing facilities

to be extended during factory inspection, List of make of major materials, details of similarto be extended during factory inspection, List of make of major materials, details of similar

works done during last three years, details of similar concurrent works, annual turnoverworks done during last three years, details of similar concurrent works, annual turnover

statement, VAT clearance certificate, PAN, VAT registration certificate and EMD. statement, VAT clearance certificate, PAN, VAT registration certificate and EMD.


Part IIPart II will cover the technical bid with required drawings, general conditions, special conditions will cover the technical bid with required drawings, general conditions, special conditions

and Guaranteed technical particulars.and Guaranteed technical particulars.

Part IIIPart III will cover only the price bid. will cover only the price bid. (This shall be submitted in a double sealed envelope)(This shall be submitted in a double sealed envelope)

Each envelope shall be duly sealed and super-scribed with ‘Commercial Bid’, ‘Technical Bid’,Each envelope shall be duly sealed and super-scribed with ‘Commercial Bid’, ‘Technical Bid’,

and ‘Price Bid’ respectively. All the three envelopes shall be put inside another envelope, super-and ‘Price Bid’ respectively. All the three envelopes shall be put inside another envelope, super-

scribed with “Tender for scribed with “Tender for Design, supply & delivery of 33KV outdoor type CT & PT, 36KVDesign, supply & delivery of 33KV outdoor type CT & PT, 36KV

1500MVA outdoor type VCB, 33KV feeder panel, 11KV indoor type 800MVA VCB for1500MVA outdoor type VCB, 33KV feeder panel, 11KV indoor type 800MVA VCB for

33/11KV, 2 x 8 MVA Substation at Growth Centre, Jharsuguda33/11KV, 2 x 8 MVA Substation at Growth Centre, Jharsuguda : Date of Opening:: Date of Opening:

Dt.Dt. 10.03.11 10.03.11” and sealed properly.” and sealed properly.

Bid must be delivered to the office of the undersigned on or before the 15.00 Hrs of datedBid must be delivered to the office of the undersigned on or before the 15.00 Hrs of dated

08.03.11 by 08.03.11 by Registered post / Speed post Registered post / Speed post only. Any Bid received by the Purchaser after theonly. Any Bid received by the Purchaser after the

deadline for submission of Bids prescribed by the Purchaser, pursuant to Clause 19, will bedeadline for submission of Bids prescribed by the Purchaser, pursuant to Clause 19, will be

declared “Late” and rejected outright and returned unopened to the Bidder.declared “Late” and rejected outright and returned unopened to the Bidder.

The Commercial Bid and Technical bid in Part (i) & (ii) shall be opened on the due date ofThe Commercial Bid and Technical bid in Part (i) & (ii) shall be opened on the due date of

opening mentioned in tender call notice. Tenderers may be called to participate in techno-opening mentioned in tender call notice. Tenderers may be called to participate in techno-

commercial discussions/ negotiations for finalisation of technical bid. commercial discussions/ negotiations for finalisation of technical bid.

The price bid shall be opened after finalisation of technical bid.The price bid shall be opened after finalisation of technical bid.

4.14.1 Telegraphic tenders will not be accepted.Telegraphic tenders will not be accepted.5.05.0 Receipt and Opening of Tender:Receipt and Opening of Tender:

Tenders as described under Clause-3 shall be received in the office of the Divisional Head,Tenders as described under Clause-3 shall be received in the office of the Divisional Head, Electrical Division, IDCO, Bhubaneswar and shall be opened on the scheduled date.Electrical Division, IDCO, Bhubaneswar and shall be opened on the scheduled date.

6.06.0 Prices:Prices:The tenderer shall ensure that all prices are filled in the price schedule both in works and figures.The tenderer shall ensure that all prices are filled in the price schedule both in works and figures.

No over writing shall be allowed. The tenderer shall countersign all scoring and cancellation. InNo over writing shall be allowed. The tenderer shall countersign all scoring and cancellation. In

case of illegibility, the interpretation and decision of the Engineer – in – Charge will be final. case of illegibility, the interpretation and decision of the Engineer – in – Charge will be final.

All entry shall be in Engilish language only. The price should be inclusive of all taxes, duties &All entry shall be in Engilish language only. The price should be inclusive of all taxes, duties &

transit insurance for FOR destination. Please note that this office will not issue any concessionaltransit insurance for FOR destination. Please note that this office will not issue any concessional

form for sales tax. The purchaser shall not issue any Waybill. form for sales tax. The purchaser shall not issue any Waybill.

When there is difference between a rate in figure and in words, the rate that correspond toWhen there is difference between a rate in figure and in words, the rate that correspond to the amount worked out by the bidder shall be taken as correct. the amount worked out by the bidder shall be taken as correct.

When the bidder has not worked out the amount of an item or it does neither correspondWhen the bidder has not worked out the amount of an item or it does neither correspond with the rate written in figures not in words, then rate quoted by the bidder in words shallwith the rate written in figures not in words, then rate quoted by the bidder in words shall be taken as correct. be taken as correct.

When the rate quoted by the bidder in figures and in words tallies but the amount is notWhen the rate quoted by the bidder in figures and in words tallies but the amount is not worked out correctly, the rate quoted by the bidder shall be taken as correct and not theworked out correctly, the rate quoted by the bidder shall be taken as correct and not the amount. amount.


7.07.0 Registration Certificates:Registration Certificates:The tenderer shall furnish valid VAT, PAN and PF Registration certificate along with his tender.The tenderer shall furnish valid VAT, PAN and PF Registration certificate along with his tender.

Tenders not accompanied with these documents shall be liable for rejection at the discretion ofTenders not accompanied with these documents shall be liable for rejection at the discretion of

the purchaser.the purchaser.

8.08.0 Validity:Validity:The tenderers shall keep the tender valid for a period of 180 (one hundred eighty) days from theThe tenderers shall keep the tender valid for a period of 180 (one hundred eighty) days from the

date of opening of price bid.date of opening of price bid.

9.09.0 Deviation from SpecificationDeviation from SpecificationIt is in the interest of the Tenderers to study the Specification, drawing etc. specified in theIt is in the interest of the Tenderers to study the Specification, drawing etc. specified in the

tender schedule thoroughly before tendering so that, if any deviations are made by the Tenderers,tender schedule thoroughly before tendering so that, if any deviations are made by the Tenderers,

the same are prominently brought out on a separate sheet in the Deviation Statement Format.the same are prominently brought out on a separate sheet in the Deviation Statement Format.

Unless deviations are specifically mentioned in the Deviation Statement Formats attached in theUnless deviations are specifically mentioned in the Deviation Statement Formats attached in the

tender paper, it shall be presumed that the Tenderer has accepted all the conditions, stipulated intender paper, it shall be presumed that the Tenderer has accepted all the conditions, stipulated in

the tender Specification, notwithstanding any exemptions mentioned therein.the tender Specification, notwithstanding any exemptions mentioned therein.

10.010.0 Payment:Payment:100% payment with all taxes and duties will be paid against completion of delivery and100% payment with all taxes and duties will be paid against completion of delivery and

verification thereof, subject to submission of a Bank Guarantee covering 10% of the contractverification thereof, subject to submission of a Bank Guarantee covering 10% of the contract

price to cover the guarantee period, i.e. valid for a period of one year from the date ofprice to cover the guarantee period, i.e. valid for a period of one year from the date of

commissioning or 18 months from the date of supply whichever is earlier, towards performancecommissioning or 18 months from the date of supply whichever is earlier, towards performance

guarantee from any nationalised bank operable at Bhubaneswar/ Cuttack only.guarantee from any nationalised bank operable at Bhubaneswar/ Cuttack only.

11.011.0 Liquidated Damage for Delay in Completion:Liquidated Damage for Delay in Completion:If the supplier fails in the due performance of the contract to supply the equipment within theIf the supplier fails in the due performance of the contract to supply the equipment within the

time fixed by the contract or any extension thereof, he shall be liable at the discretion of thetime fixed by the contract or any extension thereof, he shall be liable at the discretion of the

purchaser to a liquidated damage amounting to half percent (0.5%) of the contract price perpurchaser to a liquidated damage amounting to half percent (0.5%) of the contract price per

week. In any case, the contractor’s liability for delay shall not exceed 5% (five percent) of theweek. In any case, the contractor’s liability for delay shall not exceed 5% (five percent) of the

total contract price and subject to force majeure conditions. total contract price and subject to force majeure conditions.

12.012.0 Force Majeure:Force Majeure:The term “Force Majeure” as employed herein include, acts of God or force of nature, landslide,The term “Force Majeure” as employed herein include, acts of God or force of nature, landslide,

earthquake, flood, fire, lightning, explosion, major storm (hurricane, typhoon, cyclone etc.) orearthquake, flood, fire, lightning, explosion, major storm (hurricane, typhoon, cyclone etc.) or

major storm warning, tidal wave, shipwreck and perils of navigation, act of war (declared ormajor storm warning, tidal wave, shipwreck and perils of navigation, act of war (declared or

undeclared) or public enemy, strike (excluding employee strikes, lockouts or other industrialundeclared) or public enemy, strike (excluding employee strikes, lockouts or other industrial

disputes or action solely among employee of Contractor or its subcontractors) act or omission ofdisputes or action solely among employee of Contractor or its subcontractors) act or omission of

Sovereign States or those purporting to represent Sovereign States, blockade, embargo,Sovereign States or those purporting to represent Sovereign States, blockade, embargo,

quarantine, public disorder, sabotage, accident or similar events beyond the control of the partiesquarantine, public disorder, sabotage, accident or similar events beyond the control of the parties

or either of them.or either of them.


Force Majeure shall not include occurrences as follows :Force Majeure shall not include occurrences as follows : Late delivery of materials caused by congestion of Seller’s facilities or elsewhere, andLate delivery of materials caused by congestion of Seller’s facilities or elsewhere, and

oversold condition of the market, inefficiencies, or similar occurrences.oversold condition of the market, inefficiencies, or similar occurrences. Late performance by Seller and / or Sub-Seller caused by unavailability of raw materials,Late performance by Seller and / or Sub-Seller caused by unavailability of raw materials,

supervisors or labour, inefficiencies of similar occurrences.supervisors or labour, inefficiencies of similar occurrences. Mechanical breakdown of any item of Seller’s or its Sub-Seller’s equipment, plant orMechanical breakdown of any item of Seller’s or its Sub-Seller’s equipment, plant or

machinery.machinery. Delays due to ordinary storm or inclement weather.Delays due to ordinary storm or inclement weather. Non-conformance by Sub-Seller.Non-conformance by Sub-Seller.Unless the delay arises out of a Force Majeure occurrence and is beyond both Seller’s and Sub-Unless the delay arises out of a Force Majeure occurrence and is beyond both Seller’s and Sub-

Seller’s or Seller’s control and an alternate acceptable source of services, equipment or materialSeller’s or Seller’s control and an alternate acceptable source of services, equipment or material

is unavailable. Additionally, Force Majeure shall not include financial distress of Seller or anyis unavailable. Additionally, Force Majeure shall not include financial distress of Seller or any

Sub-Seller. Any delay or failure in performance by either party hereto shall not give rise to anySub-Seller. Any delay or failure in performance by either party hereto shall not give rise to any

claims for damages or loss of anticipated profits if and to the extent, such delay or failure isclaims for damages or loss of anticipated profits if and to the extent, such delay or failure is

caused by Force Majeure.caused by Force Majeure.

13.013.0 Despatch Instructions:Despatch Instructions:The materials under this contract shall be despatched to the work site at Growth Centre,The materials under this contract shall be despatched to the work site at Growth Centre,

Jharsuguda. These shall be duly packed by the seller suitably as per the standard procedure forJharsuguda. These shall be duly packed by the seller suitably as per the standard procedure for

safe transport to the site / store. The cases shall be clearly marked showing distinctly the namesafe transport to the site / store. The cases shall be clearly marked showing distinctly the name

and address of the consignee. In case of special instructions, such as” this end up”, “fragile”,and address of the consignee. In case of special instructions, such as” this end up”, “fragile”,

“handle with care” etc., the same shall be clearly displayed on the cases. “handle with care” etc., the same shall be clearly displayed on the cases.

The materials shall be insured at the cost and risk of the supplier. The supplier shall have toThe materials shall be insured at the cost and risk of the supplier. The supplier shall have to

intimate the probable date of arrival of materials at site to all concerned in advance.intimate the probable date of arrival of materials at site to all concerned in advance.

14.014.0 Inspection and Test:Inspection and Test:The purchaser shall inspect, examine and test the equipment’s/ materials through itsThe purchaser shall inspect, examine and test the equipment’s/ materials through its

representative at the manufacturers/ suppliers works during or after the manufacture of goodsrepresentative at the manufacturers/ suppliers works during or after the manufacture of goods

prior to despatch on receipt of a clear notice of minimum seven days in advance to be reckonedprior to despatch on receipt of a clear notice of minimum seven days in advance to be reckoned

from the date of receipt by the purchaser. The supplier shall provide all facilities as may befrom the date of receipt by the purchaser. The supplier shall provide all facilities as may be

required to carry out the tests in accordance with approved standards free of cost.required to carry out the tests in accordance with approved standards free of cost.

15.015.0 Earnest Money:Earnest Money:(i)(i) The tenderer shall be required to submit Earnest Money deposit as indicated in the NIT.The tenderer shall be required to submit Earnest Money deposit as indicated in the NIT.(ii)(ii) The EMD shall be deposited either in cash or a crossed Bank Draft/ Pay Order drawn in favourThe EMD shall be deposited either in cash or a crossed Bank Draft/ Pay Order drawn in favour

of Orissa Industrial Infrastructure Development Corporation, Bhubaneswar of any Nationalisedof Orissa Industrial Infrastructure Development Corporation, Bhubaneswar of any Nationalised Bank drawn payable at Bhubaneswar.Bank drawn payable at Bhubaneswar.

(iii)(iii) Earnest Money shall be forfeited in case of withdrawal / modification of an offer within theEarnest Money shall be forfeited in case of withdrawal / modification of an offer within the validity period as required in the NIT/ Tender Specification after opening of tenders.validity period as required in the NIT/ Tender Specification after opening of tenders.

(iv)(iv) In case of tenders not accepted, the Earnest Money shall be refunded within 30 days of theIn case of tenders not accepted, the Earnest Money shall be refunded within 30 days of the accord of order/ contract to the successful tender.accord of order/ contract to the successful tender.


(v)(v) Bids not accompanied by the required EMD in accordance with the Clause above, or if theBids not accompanied by the required EMD in accordance with the Clause above, or if the EMD is of inadequate value, the tender shall be liable for rejection at the discretion of theEMD is of inadequate value, the tender shall be liable for rejection at the discretion of the purchaser.purchaser.

(vi)(vi) Earnest Money shall be forfeited in case of non-acceptance of purchase order within stipulatedEarnest Money shall be forfeited in case of non-acceptance of purchase order within stipulated period.period.

16.016.0 LOI and Security Deposit:LOI and Security Deposit:The letter of intent shall be issued to the successful bidder whose bid shall be consideredThe letter of intent shall be issued to the successful bidder whose bid shall be considered

responsive, techno-commercially acceptable and evaluated to be the Lowest (L1). The successfulresponsive, techno-commercially acceptable and evaluated to be the Lowest (L1). The successful

bidder shall be required to furnish a letter of acceptance within 7 days of issue of the letter ofbidder shall be required to furnish a letter of acceptance within 7 days of issue of the letter of

intent. intent.

The successful tenderers shall be required to submit security deposit for faithful execution of theThe successful tenderers shall be required to submit security deposit for faithful execution of the

order at the rate of 10% of the value in shape of a Bank Guarantee from any nationalised Bankorder at the rate of 10% of the value in shape of a Bank Guarantee from any nationalised Bank

operable at its Bhubaneswar/ Cuttack branch only valid up to one month from the date ofoperable at its Bhubaneswar/ Cuttack branch only valid up to one month from the date of

completion of full supply of materials.completion of full supply of materials.

17.017.0 Performance Guarantee and Performance Guarantee Bond:Performance Guarantee and Performance Guarantee Bond:The supplier shall guarantee for satisfactory operation of the equipment for a minimum period ofThe supplier shall guarantee for satisfactory operation of the equipment for a minimum period of

24 months from the date of Commissioning or 30 months from the date of receipt of24 months from the date of Commissioning or 30 months from the date of receipt of

consignment which ever is earlier. consignment which ever is earlier.

In the event of any defect in the equipment/ materials arising out of faulty design, inferior qualityIn the event of any defect in the equipment/ materials arising out of faulty design, inferior quality

of raw material of raw material used or bad workmanship within the guarantee period, the supplier shall guarantee toused or bad workmanship within the guarantee period, the supplier shall guarantee to

replace/ repair to the satisfaction of the purchaser the defective equipments free of cost. If the supplierreplace/ repair to the satisfaction of the purchaser the defective equipments free of cost. If the supplier

fails to do so within a reasonable time, the purchaser reserves the right to recover the amount from thefails to do so within a reasonable time, the purchaser reserves the right to recover the amount from the

pending bills or may recover from the Performance Guarantee submitted by the supplier. pending bills or may recover from the Performance Guarantee submitted by the supplier.

The contractor shall furnish a Bond by way of Bank Guarantee from any Nationalised BankThe contractor shall furnish a Bond by way of Bank Guarantee from any Nationalised Bank

operable at its Bhubaneswar/ Cuttack branch to cover 90days beyond the guarantee period in alloperable at its Bhubaneswar/ Cuttack branch to cover 90days beyond the guarantee period in all

respects equal to 10% of the total price for faithful and for fulfilling the terms of guarantee for arespects equal to 10% of the total price for faithful and for fulfilling the terms of guarantee for a

period of 18 months from the date of supply of 12 months from the date of commissioningperiod of 18 months from the date of supply of 12 months from the date of commissioning

whichever is earlier.whichever is earlier.

18.018.0 Clarification desired by the Tenderer:Clarification desired by the Tenderer:The tenderer should seek for the clarifications, if any, with regard to the specification beforeThe tenderer should seek for the clarifications, if any, with regard to the specification before

submission of the tender. No correspondence on this account will be entertained once thesubmission of the tender. No correspondence on this account will be entertained once the

tenderer has submitted the tender. For seeking clarification, the tenderers are requested to contacttenderer has submitted the tender. For seeking clarification, the tenderers are requested to contact

Er. B. Rath, Jt. Manager (Elect), IDCO.Er. B. Rath, Jt. Manager (Elect), IDCO.

19.019.0 Reservation of Right:Reservation of Right:The owner reserves the rights to accept any bid or, reject any or, all bids or cancel/ withdrawThe owner reserves the rights to accept any bid or, reject any or, all bids or cancel/ withdraw

invitation for invitation for bid without assigning any reason for such decision. Such decision, by the owner shall notbid without assigning any reason for such decision. Such decision, by the owner shall not


be subject to question by any bidder and the owner be subject to question by any bidder and the owner shall bear no liability whatsoever consequentshall bear no liability whatsoever consequent

upon such a decision. The authority reserves the right to split the supply order among theupon such a decision. The authority reserves the right to split the supply order among the

participants as per suitability for timely completion of the supply.participants as per suitability for timely completion of the supply.

20.020.0 Disclaimer:Disclaimer:This Document includes statements, which reflect various assumptions, which may or may notThis Document includes statements, which reflect various assumptions, which may or may not

be correct. Each Bidder should conduct its own estimation and analysis and should check thebe correct. Each Bidder should conduct its own estimation and analysis and should check the

accuracy, reliability and completeness of the information in this Document and obtainaccuracy, reliability and completeness of the information in this Document and obtain

independent advice from appropriate sources in their own interest.independent advice from appropriate sources in their own interest.

Neither Purchaser nor its employees will have any liability whatsoever to any Bidder or anyNeither Purchaser nor its employees will have any liability whatsoever to any Bidder or any

other person under the law or contract, the principles of restitution or unjust enrichment orother person under the law or contract, the principles of restitution or unjust enrichment or

otherwise for any loss, expense or damage whatsoever which may arise from or be incurred orotherwise for any loss, expense or damage whatsoever which may arise from or be incurred or

suffered in connection with anything contained in this Document, any matter deemed to formsuffered in connection with anything contained in this Document, any matter deemed to form

part of this Document, provision of Services and any other information supplied by or on behalfpart of this Document, provision of Services and any other information supplied by or on behalf

of Purchaser or its employees, or otherwise arising in any way from the selection process for theof Purchaser or its employees, or otherwise arising in any way from the selection process for the

Supply / provision of Services for the Project.Supply / provision of Services for the Project.

Though adequate care has been taken while issuing the Bid document, the Bidder should satisfyThough adequate care has been taken while issuing the Bid document, the Bidder should satisfy

himself that documents are complete in all respects. Intimation of any discrepancy/ doubt shallhimself that documents are complete in all respects. Intimation of any discrepancy/ doubt shall

be sent to the Joint Manager (Elect), IDCO, Bhubaneswar (Ph: 674- 2541766) for speedybe sent to the Joint Manager (Elect), IDCO, Bhubaneswar (Ph: 674- 2541766) for speedy

response.response.

This document and the information contained herein are This document and the information contained herein are Strictly ConfidentialStrictly Confidential and are for use of and are for use of

only the person (s) to whom it is issued. It may not be copied or distributed by the recipient toonly the person (s) to whom it is issued. It may not be copied or distributed by the recipient to

third parties (other than in confidence to the recipient’s professional advisors).third parties (other than in confidence to the recipient’s professional advisors).

21.021.0 Cost of Bidding:Cost of Bidding:

The Bidder shall bear all costs associated with the preparation and submission of its Bid andThe Bidder shall bear all costs associated with the preparation and submission of its Bid and

Purchaser will in no case be responsible or liable for those costs.Purchaser will in no case be responsible or liable for those costs.

22.022.0 Time Schedule:Time Schedule:

The materials should be supplied in full within The materials should be supplied in full within 3 (Three) months3 (Three) months from the date of issue of from the date of issue of

purchase order. purchase order.

23.023.0 Consignee:Consignee:

Deputy Manager, (Electrical) Angul, IDCO, Angul shall be the consignee.Deputy Manager, (Electrical) Angul, IDCO, Angul shall be the consignee.

24.024.0 Jurisdiction of Court:Jurisdiction of Court:

Dispute / Litigation if any, arising out of this contract deemed to have been entered into atDispute / Litigation if any, arising out of this contract deemed to have been entered into at

Bhubaneswar shall be under the jurisdiction of Orissa High Court.Bhubaneswar shall be under the jurisdiction of Orissa High Court.


SECTION –ASECTION –A

TECHINICAL SPECIFICATIONS TECHINICAL SPECIFICATIONS

FOR FOR

33 KV OUTDOOR VACUUM CIRCUIT33 KV OUTDOOR VACUUM CIRCUIT

BREAKERSBREAKERS


SECTION – (A)SECTION – (A)

TECHNICAL SPECIFICATION FOR 33KV OUTDOOR VACUUM CIRCUIT BREAKERSTECHNICAL SPECIFICATION FOR 33KV OUTDOOR VACUUM CIRCUIT BREAKERS

1.1. SCOPESCOPE

1.11.1 This specification covers design, engineering, manufacture, testing, inspection beforeThis specification covers design, engineering, manufacture, testing, inspection before

dispatch, packing, forwarding, transportation, insurance during transit, delivery to site atdispatch, packing, forwarding, transportation, insurance during transit, delivery to site at

Growth Centre, Jharsuguda of 33 KV Outdoor Vacuum Circuit breakers for use in theGrowth Centre, Jharsuguda of 33 KV Outdoor Vacuum Circuit breakers for use in the

33/11 KV primary substations along with required structure, CT, PT and foundation nut33/11 KV primary substations along with required structure, CT, PT and foundation nut

& bolts at Growth Centre. & bolts at Growth Centre.

1.21.2 All vacuum circuit breakers must be manufactured by ISO 9000 certified OrganizationAll vacuum circuit breakers must be manufactured by ISO 9000 certified Organization

and shall have been type tested at CPRI or any Govt. approved laboratory within Tenand shall have been type tested at CPRI or any Govt. approved laboratory within Ten

years as on the date of bid opening and in satisfactory operation for a period not less thanyears as on the date of bid opening and in satisfactory operation for a period not less than

three years. The Bidder shall demonstrate compliance with this requirement by supplyingthree years. The Bidder shall demonstrate compliance with this requirement by supplying

with the bid, copies of the type test certificates together with performance certificateswith the bid, copies of the type test certificates together with performance certificates

from purchasers/ users.from purchasers/ users.

1.31.3 The scope also includes the circuit breaker and current and potential transformers,The scope also includes the circuit breaker and current and potential transformers,

supporting structures, operating mechanism, local/ remote control cabinet, relay controlsupporting structures, operating mechanism, local/ remote control cabinet, relay control

panel, foundation bolts, all the accessories and auxiliary equipment, mandatory spares andpanel, foundation bolts, all the accessories and auxiliary equipment, mandatory spares and

special tools for satisfactory installation and operation.special tools for satisfactory installation and operation.

1.41.4 The circuit breakers shall conform in all respects to the highest standards of engineering,The circuit breakers shall conform in all respects to the highest standards of engineering,

design, workmanship, this specification and the latest revisions of relevant standards atdesign, workmanship, this specification and the latest revisions of relevant standards at

the time of offer and the Purchaser shall have the power to reject any work or materials,the time of offer and the Purchaser shall have the power to reject any work or materials,

which, in his judgment, is not in full accordance therewith.which, in his judgment, is not in full accordance therewith.

2.2. STANDARDSSTANDARDS

Except where modified by this specification, the circuit breakers and the accessories shall beExcept where modified by this specification, the circuit breakers and the accessories shall be designed, manufactured and tested in accordance with latest editions of the following standards.designed, manufactured and tested in accordance with latest editions of the following standards.


IEC/ISO/BSIEC/ISO/BS ISIS SubjectSubject

IEC :56IEC :56 IS: 13118IS: 13118 High voltage alternating current circuit breakers general requirement.High voltage alternating current circuit breakers general requirement.

IEC:694IEC:694 IS : 12729IS : 12729 Common clauses for high voltage switch-gear and control gearCommon clauses for high voltage switch-gear and control gear standards (for voltages exceeding 1000 V).standards (for voltages exceeding 1000 V).

IEC : 60IEC : 60 IS : 9135IS : 9135 High Voltage testing techniques High Voltage testing techniques

IEC :427IEC :427 IS :13516IS :13516 Method of synthetic testing of HV. A.C circuit breakers.Method of synthetic testing of HV. A.C circuit breakers.

IEC:1233IEC:1233 HV. AC. Circuit breakers –inductive load switchingHV. AC. Circuit breakers –inductive load switching

IEC:17A/CD:474IEC:17A/CD:474 HV. AC. Circuit breaker – capacitive switchingHV. AC. Circuit breaker – capacitive switching

IEC:529IEC:529 IS: 13947IS: 13947 Degree of protection provided by enclosureDegree of protection provided by enclosure

IEC :137IEC :137 IS: 2099IS: 2099 Insulating bushing for A.C voltages above 1000 V.Insulating bushing for A.C voltages above 1000 V.

IEC :233IEC :233 IS: 5621IS: 5621 Hollow insulators for use in electrical equipment & testingHollow insulators for use in electrical equipment & testing

IEC: 273IEC: 273 IS: 5350IS: 5350 Characteristics of indoor and outdoor post insulators for systems withCharacteristics of indoor and outdoor post insulators for systems with nominal voltages greater than 1000 V.nominal voltages greater than 1000 V.

IEC : 815IEC : 815 IS : 13134IS : 13134 Guide for selection of insulators in respect of polluted conditions.Guide for selection of insulators in respect of polluted conditions.

IEC : 34IEC : 34 IS: 996IS: 996 A.C motorsA.C motors

ISO : 1460ISO : 1460BS: 729BS: 729

IS : 2629IS : 2629 Hot dip galvanizingHot dip galvanizing

IS : 2633IS : 2633 Method of testing uniformity of zinc coated articles.Method of testing uniformity of zinc coated articles.

IS : 5IS : 5 Colour for ready missed paints and enamels Colour for ready missed paints and enamels

IS : 6005IS : 6005 Code of practice for phosphating of iron and steel.Code of practice for phosphating of iron and steel.

IEC : 227IEC : 227 IS : 1554IS : 1554 P.V.C Insulated cables for voltages up to and including 1100 volt.P.V.C Insulated cables for voltages up to and including 1100 volt.

IEC : 269IEC : 269 IS : 13703IS : 13703 Low voltage fuses for voltages not exceeding 1000 volt.Low voltage fuses for voltages not exceeding 1000 volt.

ISO : 800ISO : 800 IS : 1300IS : 1300 Phenolic moulding materialsPhenolic moulding materials

IS : 13118IS : 13118 Guide for uniform marking and identification of conductors andGuide for uniform marking and identification of conductors and apparatus terminals.apparatus terminals.

IEC : 185IEC : 185 IS : 2705IS : 2705 Current transformers.Current transformers.

IEC : 296IEC : 296 IS: 335IS: 335 Specification for unused insulating oil for transformer and switchgear.Specification for unused insulating oil for transformer and switchgear.

IEC : 186IEC : 186 IS : 3156IS : 3156 Potential transformersPotential transformers

CBIP Technical Report No. 88CBIP Technical Report No. 88 revised July, 1996 read withrevised July, 1996 read with amendment issued (April, 99,amendment issued (April, 99, September,99 and also anySeptember,99 and also any other amendment thereafter)other amendment thereafter)

Specification for AC Static Electrical Energy Meter.Specification for AC Static Electrical Energy Meter.


This list is not to be considered exhaustive and reference to a particular standard or recommendation inThis list is not to be considered exhaustive and reference to a particular standard or recommendation in this specification does not relieve the Supplier of the necessity of providing the goods and services complyingthis specification does not relieve the Supplier of the necessity of providing the goods and services complying with other relevant standards or recommendations.with other relevant standards or recommendations.

3.3. REQUIREMENTSREQUIREMENTS

The circuit breakers to be supplied against this specification shall be required to controlThe circuit breakers to be supplied against this specification shall be required to control

the primary side of 33/11 KV power transformers in the primary sub-stations (incomingthe primary side of 33/11 KV power transformers in the primary sub-stations (incoming

33 KV feeders) or Bus coupler or the outgoing feeders in these sub-stations. The circuit33 KV feeders) or Bus coupler or the outgoing feeders in these sub-stations. The circuit

breakers shall be suitable for 3 phase, 50 Hz solidly grounded neutral system and shallbreakers shall be suitable for 3 phase, 50 Hz solidly grounded neutral system and shall

have normal current carrying capacity and symmetrical short circuit current breakinghave normal current carrying capacity and symmetrical short circuit current breaking

capability as mentioned hereunder.capability as mentioned hereunder.

The required 33 KV Vacuum Circuit Breakers suitable for outdoor installations are to be quotedThe required 33 KV Vacuum Circuit Breakers suitable for outdoor installations are to be quoted by Manufacturers only with valid ISO 9000 certification. For indoor circuit breakers only floorby Manufacturers only with valid ISO 9000 certification. For indoor circuit breakers only floor and horizontal draw out and horizontal isolation type breakers are accepted.and horizontal draw out and horizontal isolation type breakers are accepted.

3.13.1 BASIC TECHNICAL REQUIREMENTS:BASIC TECHNICAL REQUIREMENTS:

The vacuum circuit breakers are required to meet the following basic technicalThe vacuum circuit breakers are required to meet the following basic technical

requirements: (Reference standards: IEC: 56, IS: 13118 and associated standards listed inrequirements: (Reference standards: IEC: 56, IS: 13118 and associated standards listed in

this specification)this specification)

Basic Technical RequirementsBasic Technical Requirements

Sl.Sl. No.No.

Particulars Particulars RequirementsRequirements

11 Service type Service type Outdoor Outdoor 22 No. of PolesNo. of Poles 33

33 Nominal system voltageNominal system voltage 33 KV33 KV

44 Highest system voltageHighest system voltage 36 KV36 KV

55 Rated normal current at 50Rated normal current at 5000 C C

i)i) For Bus-bar of Circuit BreakerFor Bus-bar of Circuit Breaker 1250 A 1250 A

ii)ii) For InterrupterFor Interrupter 2000 A2000 A

iii)iii) For Outgoing FeedersFor Outgoing Feeders --

66 Rated short circuit breaking current (rms)Rated short circuit breaking current (rms) 25 KA25 KA

77 Rated short circuit making current (Peak)Rated short circuit making current (Peak) 63 KA63 KA

88 Rated short time current withstand capability for 3 sec.Rated short time current withstand capability for 3 sec. 25 KA (Panel)/ 31.5 KA (Interrupter)25 KA (Panel)/ 31.5 KA (Interrupter)

99 Rated insulation level :Rated insulation level :


i)i) One minute power frequency withstand voltage to earthOne minute power frequency withstand voltage to earth (wet and dry ) rms(wet and dry ) rms

70KV70KV

ii)ii) Impulse withstand voltage to earth with 1.2/50µsec.Impulse withstand voltage to earth with 1.2/50µsec. wave of +ve and –ve polarity (Peak )wave of +ve and –ve polarity (Peak )

170 KV170 KV

1010 First-pole-to clear factorFirst-pole-to clear factor 1.51.5

1111 Rated operating sequence (for auto reclosing)Rated operating sequence (for auto reclosing) O-0.3 sec-CO-3 min-COO-0.3 sec-CO-3 min-CO1212 Maximum break timeMaximum break time 3 cycles3 cycles

1313 Rated out of phase breaking currentRated out of phase breaking current 25% of the symmetrical short circuit25% of the symmetrical short circuit breaking current.breaking current.

1414 Maximum pole scatterMaximum pole scatter 10 mili seconds10 mili seconds1515 Rated Auxiliary supply for spring charge motor, lamp &Rated Auxiliary supply for spring charge motor, lamp &

heater circuit.heater circuit.230 V A.C230 V A.C

1616 Rated supply voltage for trip / close coilRated supply voltage for trip / close coil 110 V D.C110 V D.C1717 Minimum creepage distance (mm)Minimum creepage distance (mm) 900 mm900 mm1818 Minimum protected creepage distance (mm)Minimum protected creepage distance (mm) 450 mm450 mm

4.4. SERVICE CONDITIONS:SERVICE CONDITIONS: The service conditions shall be as follows:The service conditions shall be as follows:

maximum a altitude above sea levelmaximum a altitude above sea level 1,000m1,000m

maximum ambient air temperaturemaximum ambient air temperature 50° C50° C

maximum daily average ambient air temperaturemaximum daily average ambient air temperature 35° C35° C

minimum ambient air temperatureminimum ambient air temperature 5° C 5° C

maximum temperature attainable by an object exposed to the sunmaximum temperature attainable by an object exposed to the sun 60° C60° C

maximum yearly weighted average ambient temperaturemaximum yearly weighted average ambient temperature 32° C32° C

maximum relative humiditymaximum relative humidity 100%100%

average number of thunderstorm days per annum (isokeraunic level)average number of thunderstorm days per annum (isokeraunic level) 7070

average number of rainy days per annumaverage number of rainy days per annum 120120

average annual rainfallaverage annual rainfall 1500 mm1500 mm

maximum wind pressuremaximum wind pressure 260Kg / m260Kg / m22

5.5. 33 KV VACUUM CIRCUIT BREAKERS33 KV VACUUM CIRCUIT BREAKERS

5.15.1 GeneralGeneral

The circuit breakers shall be structure mounted open type with vacuum as interrupting The circuit breakers shall be structure mounted open type with vacuum as interrupting media incorporating separate interrupters of 2000 A rating for each phase mounted on media incorporating separate interrupters of 2000 A rating for each phase mounted on single frame. There shall be a common drive mechanism actuating the interrupters, single frame. There shall be a common drive mechanism actuating the interrupters, which must work in synchronism. These breakers shall be provided with suitable local which must work in synchronism. These breakers shall be provided with suitable local control while provision shall be made for remote control.control while provision shall be made for remote control.


The circuit breakers shall be fitted with spring mechanism. The inherent design of these The circuit breakers shall be fitted with spring mechanism. The inherent design of these circuit breakers shall be such that they shall satisfactorily perform all test duties and circuit breakers shall be such that they shall satisfactorily perform all test duties and interrupt out-of-phase current and produce very low over voltage (<2.0 p.u.) on all interrupt out-of-phase current and produce very low over voltage (<2.0 p.u.) on all switching circuits, capacitive and inductive to IEC:56, IS:13118 and other associated switching circuits, capacitive and inductive to IEC:56, IS:13118 and other associated standards mentioned in the clause of this specification.standards mentioned in the clause of this specification.

The terminal pads shall have silver-plating of at least 50 micron thickness. The design of The terminal pads shall have silver-plating of at least 50 micron thickness. The design of the circuit breaker shall be such that inspection and replacement of contacts, coils, the circuit breaker shall be such that inspection and replacement of contacts, coils, vacuum bottles and any worn or damaged components can be carried out quickly and vacuum bottles and any worn or damaged components can be carried out quickly and with ease. The contact gaps shall be adjustable to allow for wear.with ease. The contact gaps shall be adjustable to allow for wear.

The mechanism and the connected interrupters shall satisfy the mechanical endurance The mechanism and the connected interrupters shall satisfy the mechanical endurance requirements of IEC: 56, IS: 13118 and all additional requirements specified herein.requirements of IEC: 56, IS: 13118 and all additional requirements specified herein.

5.25.2 Porcelain InsulatorPorcelain Insulator

External parts of the circuit breakers, which are under continuous electrical stress, shall External parts of the circuit breakers, which are under continuous electrical stress, shall be of hollow porcelain. The creepage and flashover distance of the insulators shall be be of hollow porcelain. The creepage and flashover distance of the insulators shall be dimensioned and the type and profile designed in accordance with IEC: 815 or IS: 13134dimensioned and the type and profile designed in accordance with IEC: 815 or IS: 13134 and shall be suitable for the worst environmental conditions specified in this and shall be suitable for the worst environmental conditions specified in this specification. The creepage distance across the interrupting chambers shall suit the specification. The creepage distance across the interrupting chambers shall suit the outdoor service conditions mentioned in the relevant standard for heavily polluted outdoor service conditions mentioned in the relevant standard for heavily polluted atmosphere and shall be not less than 900 mm with protected creepage distance 50 atmosphere and shall be not less than 900 mm with protected creepage distance 50 percent of the total. Internal surfaces of hollow insulators shall also be glazed. The percent of the total. Internal surfaces of hollow insulators shall also be glazed. The insulators shall comply with IS: 5621 and tested in accordance with IEC: 233.insulators shall comply with IS: 5621 and tested in accordance with IEC: 233.

All porcelain whether, used on the interrupting chamber or on the support insulator shall All porcelain whether, used on the interrupting chamber or on the support insulator shall have the following properties: have the following properties:

Higher strength, homogeneity, uniform glaze, free from cavities and other flaws and highHigher strength, homogeneity, uniform glaze, free from cavities and other flaws and high quality uniform finish Porcelain components and shall withstand the maximum expected quality uniform finish Porcelain components and shall withstand the maximum expected static and dynamic loads to which the circuit breakers may be subjected during their static and dynamic loads to which the circuit breakers may be subjected during their service life. service life.

5.35.3 Interrupting mediaInterrupting media

5.3.15.3.1 Vacuum:Vacuum:

In vacuum circuit breakers, facilities shall be provided for monitoring the contact erosionIn vacuum circuit breakers, facilities shall be provided for monitoring the contact erosion and any change in contact gap. The vacuum bottles shall be easily replaceable on site andand any change in contact gap. The vacuum bottles shall be easily replaceable on site and the mechanism shall be conveniently adjustable to permit resetting the contact gap.the mechanism shall be conveniently adjustable to permit resetting the contact gap.

The vacuum circuit breaker poles shall be sealed to prevent contamination of the spaces The vacuum circuit breaker poles shall be sealed to prevent contamination of the spaces surrounding the interrupters. The Bidder shall demonstrate how this is achieved by surrounding the interrupters. The Bidder shall demonstrate how this is achieved by supplying technical details with the bid.supplying technical details with the bid.

5.45.4 Auxiliary contacts Auxiliary contacts

12 auxiliary contacts (6 N.O. + 6 N.C.) of 110 Volt DC grade and 10 amps. DC rating 12 auxiliary contacts (6 N.O. + 6 N.C.) of 110 Volt DC grade and 10 amps. DC rating shall be provided in each circuit breakershall be provided in each circuit breaker

5.55.5 Indication Indication

A mechanically operated circuit breaker position indicator of non corroding material A mechanically operated circuit breaker position indicator of non corroding material shall be provided in a location visible from the operating side of the breaker without the shall be provided in a location visible from the operating side of the breaker without the


necessity to open the mechanism door. The word ‘OFF’ in white letters on green necessity to open the mechanism door. The word ‘OFF’ in white letters on green background shall be used to indicate that the breaker is in the open position and the word background shall be used to indicate that the breaker is in the open position and the word ‘ON’ in white letters on a red background to indicate that the breaker is in the closed ‘ON’ in white letters on a red background to indicate that the breaker is in the closed position. The drive for the device shall be positive in both directions and provision shall position. The drive for the device shall be positive in both directions and provision shall be made for local and remote electrical indication.be made for local and remote electrical indication.

Indication of spring charging condition shall be provided as mentioned in this Indication of spring charging condition shall be provided as mentioned in this specification. Mechanical counters to record the number of closing operations shall be specification. Mechanical counters to record the number of closing operations shall be provided for each circuit breaker mechanism.provided for each circuit breaker mechanism.

5.65.6 Operation and controls Operation and controls

The breaker shall normally be operated by remote electrical control with electrical The breaker shall normally be operated by remote electrical control with electrical tripping by shunt trip coil. Provision shall be made for local electrical operation and tripping by shunt trip coil. Provision shall be made for local electrical operation and mechanical operation.mechanical operation.

The following facilities shall be provided in the circuit breaker local control cabinet:The following facilities shall be provided in the circuit breaker local control cabinet:

LOCAL / REMOTE selector switch of stay put type. The selection of ‘local’ LOCAL / REMOTE selector switch of stay put type. The selection of ‘local’ operation shall inhibit the operation of the breaker from any remote sourceoperation shall inhibit the operation of the breaker from any remote source

ON/ NEUTRAL/ OFF control switch or ON and OFF push buttons. The push buttonsON/ NEUTRAL/ OFF control switch or ON and OFF push buttons. The push buttons shall be momentary contact type with rear terminal connections. The close push button shallshall be momentary contact type with rear terminal connections. The close push button shall be of green colour and the open push button red colour.be of green colour and the open push button red colour.

MECHANICAL EMERGENCY TRIP DEVICE: suitable for manual operation in theMECHANICAL EMERGENCY TRIP DEVICE: suitable for manual operation in the event of failure of electrical supplies . The device shall be accessible without opening anyevent of failure of electrical supplies . The device shall be accessible without opening any access doors and distinctly labeled. It shall be shrouded and protected against inadvertentaccess doors and distinctly labeled. It shall be shrouded and protected against inadvertent operation.operation.

Means shall be provided for manual operation of these circuit breakers during failure ofMeans shall be provided for manual operation of these circuit breakers during failure of auxiliary power in addition to electrical operation.auxiliary power in addition to electrical operation.

Means shall be provided to prevent the mechanism from responding to a Means shall be provided to prevent the mechanism from responding to a close signal when the trip coil is energized or to reclosing from a sustained close close signal when the trip coil is energized or to reclosing from a sustained close signal either after opening due to a trip signal or failure to hold in the closed signal either after opening due to a trip signal or failure to hold in the closed position.position.

The circuit breaker shall be able to perform 10,000 operating cycles at no load in The circuit breaker shall be able to perform 10,000 operating cycles at no load in accordance with IEC: 17A/474/CD for circuit breakers for auto reclosing duties.accordance with IEC: 17A/474/CD for circuit breakers for auto reclosing duties.

6.6. CURRENT TRANSFORMERSCURRENT TRANSFORMERS

Current transformers, three per circuit breaker, shall be of outdoor, single phase oil Current transformers, three per circuit breaker, shall be of outdoor, single phase oil immersed dead tank type and shall comply with IEC: 185 and IS: 2705, suitable for immersed dead tank type and shall comply with IEC: 185 and IS: 2705, suitable for operation in hot and humid atmospheric conditions described in service condition. They operation in hot and humid atmospheric conditions described in service condition. They shall be mounted on the bracket. The CT tank should be Hot Dip galvanized as per shall be mounted on the bracket. The CT tank should be Hot Dip galvanized as per relevant ISS to prevent corrosion of all exposed metal parts. relevant ISS to prevent corrosion of all exposed metal parts.

6.16.1 CoreCore

High grade non – ageing cold rolled grain oriented (CRGO M4 or better grade) silicon High grade non – ageing cold rolled grain oriented (CRGO M4 or better grade) silicon steel of low hysteresis loss and permeability shall be used for the core so as to ensure steel of low hysteresis loss and permeability shall be used for the core so as to ensure specified accuracy at both normal and over currents. The flux density shall be limited to specified accuracy at both normal and over currents. The flux density shall be limited to ensure that there is no saturation during normal service.ensure that there is no saturation during normal service.The instrument security factor of the core shall be low enough so as not to cause damage The instrument security factor of the core shall be low enough so as not to cause damage


to the instruments in the event of maximum short circuit current.to the instruments in the event of maximum short circuit current.

6.26.2 Windings Windings

The secondary windings shall be made of electrolytic copper with suitable insulation. The secondary windings shall be made of electrolytic copper with suitable insulation. The conductor shall be of adequate cross-section so as to limit the temperature rise even The conductor shall be of adequate cross-section so as to limit the temperature rise even during short circuit conditions. The insulation of windings and connections shall be free during short circuit conditions. The insulation of windings and connections shall be free from composition liable to soften, ooze, shrink or collapse during service.from composition liable to soften, ooze, shrink or collapse during service.

Polarity shall be indelibly marked on each current transformer and at the lead and Polarity shall be indelibly marked on each current transformer and at the lead and termination at associated terminal blocks. CTs with multi ratio winding shall be clearly termination at associated terminal blocks. CTs with multi ratio winding shall be clearly tabulated to show the connections required for different ratios. Similar numbers shall be tabulated to show the connections required for different ratios. Similar numbers shall be marked on terminal block arrangement and wiring diagram. Apart from the above marked on terminal block arrangement and wiring diagram. Apart from the above marking and those to be provided as per IEC 185 or IS 2705, other markings shall be marking and those to be provided as per IEC 185 or IS 2705, other markings shall be provided in consultation with owner.provided in consultation with owner.

The continuous current rating of the primary winding shall be one hundred and fifty The continuous current rating of the primary winding shall be one hundred and fifty percent of the normal rated current. Secondary windings of current transformers shall be percent of the normal rated current. Secondary windings of current transformers shall be used for metering, instrumentation and protection and shall be rated for continuous used for metering, instrumentation and protection and shall be rated for continuous current of one hundred and fifty percent of normal rated current of primary winding.current of one hundred and fifty percent of normal rated current of primary winding.

6.36.3 Construction Construction

The current transformer enclosures shall be made of high quality steel and shall be hot The current transformer enclosures shall be made of high quality steel and shall be hot dip galvanized and shall be able to withstand the stresses occurring during transportation dip galvanized and shall be able to withstand the stresses occurring during transportation and the thermal and mechanical stresses resulting from maximum short circuit current in and the thermal and mechanical stresses resulting from maximum short circuit current in service. The primary winding and terminals shall be in a tank and supported by a hollow service. The primary winding and terminals shall be in a tank and supported by a hollow porcelain insulator. The secondary connection shall be conduited through the hollow porcelain insulator. The secondary connection shall be conduited through the hollow insulator and terminated in a terminal box mounted on the base plate.insulator and terminated in a terminal box mounted on the base plate.

6.46.4 Hermetic sealing Hermetic sealing

Each current transformer shall be supplied filled with insulating oil complying with IEC: Each current transformer shall be supplied filled with insulating oil complying with IEC: 296 or IS: 335 and shall be heremetically sealed to prevent atmosphere coming in contact296 or IS: 335 and shall be heremetically sealed to prevent atmosphere coming in contact with oil, avoiding frequent filtration and change of oil. Nitrogen or any oil inert gas with oil, avoiding frequent filtration and change of oil. Nitrogen or any oil inert gas above the oil level shall be provided to permit expansion and contraction of oil without above the oil level shall be provided to permit expansion and contraction of oil without any contact with the atmosphere.any contact with the atmosphere.

The current transformers shall have provision for draining and re-filling insulating oil The current transformers shall have provision for draining and re-filling insulating oil after drying.after drying.

6.56.5 Insulating oilInsulating oil

The current transformer shall be complete with new insulating oil. The quantity of The current transformer shall be complete with new insulating oil. The quantity of insulating oil for first filling of the equipment and complete specification of oil proposed insulating oil for first filling of the equipment and complete specification of oil proposed to be used shall be stated in the bid. The oil shall conform to the requirements of latest to be used shall be stated in the bid. The oil shall conform to the requirements of latest issue of IEC: 296 or IS: 335.issue of IEC: 296 or IS: 335.

6.66.6 Fittings and accessories Fittings and accessories


Fittings and accessories listed below shall be supplied with each current transformer:Fittings and accessories listed below shall be supplied with each current transformer:

oil level gauge;oil level gauge; oil filling hole and cap;oil filling hole and cap; pressure relief device;pressure relief device; HV terminal connectors (Suitable for Zebra Conductor) HV terminal connectors (Suitable for Zebra Conductor) two earthing terminals and strips with necessary nuts, bolts and washers;two earthing terminals and strips with necessary nuts, bolts and washers; name and rating plate;name and rating plate; terminal box with LV terminal connections ;terminal box with LV terminal connections ; mounting nuts, bolts and washers;mounting nuts, bolts and washers;

Any other fittings deemed essential by the Supplier shall also be supplied with each Any other fittings deemed essential by the Supplier shall also be supplied with each current transformer.current transformer.

The oil level gauge shall be mounted in such a way that the oil level can be clearly seen The oil level gauge shall be mounted in such a way that the oil level can be clearly seen from ground level.from ground level.

A dust, vermin and weather proof terminal box shall be provided at the lower end of the A dust, vermin and weather proof terminal box shall be provided at the lower end of the current transformer for terminating the secondary windings. The box shall have a bolted current transformer for terminating the secondary windings. The box shall have a bolted cover plate complete with gaskets. The terminal box shall have terminal blocks, cable cover plate complete with gaskets. The terminal box shall have terminal blocks, cable gland plate and cable glands with shrouds suitable for different sizes of PVC insulated gland plate and cable glands with shrouds suitable for different sizes of PVC insulated control cables 650/1100V grade as per IEC :227 or IS :1554. The terminal blocks shall control cables 650/1100V grade as per IEC :227 or IS :1554. The terminal blocks shall have covering of moulded insulation materials complete with brass studs, washers, nuts have covering of moulded insulation materials complete with brass studs, washers, nuts and lock nuts suitable for termination of 2X2.5 sqmm wires. The termination shall be and lock nuts suitable for termination of 2X2.5 sqmm wires. The termination shall be made by crimping lugs or bare wire with insulating sleeves at ends.made by crimping lugs or bare wire with insulating sleeves at ends.

The terminal box enclosure shall have protection as per class IP 55 as defined in IEC: The terminal box enclosure shall have protection as per class IP 55 as defined in IEC: 529 or IS: 13947.529 or IS: 13947.

6.76.7 CT Junction Box / Console BoxCT Junction Box / Console Box

Each set of 3 current transformers for three phases shall be provided with a common Each set of 3 current transformers for three phases shall be provided with a common junction box mounted on the circuit breaker supporting structure at a convenient positionjunction box mounted on the circuit breaker supporting structure at a convenient position to accommodate the secondary wires of CT and other control cables of Purchaser. to accommodate the secondary wires of CT and other control cables of Purchaser. Separate terminals for testing the relays and instruments and short circuiting of each Separate terminals for testing the relays and instruments and short circuiting of each current transformer secondary wires shall be provided in it. The junction box enclosure current transformer secondary wires shall be provided in it. The junction box enclosure shall have the same protection features as for the terminal box. It shall be provided with shall have the same protection features as for the terminal box. It shall be provided with terminal blocks, gland plates and glands suitable for different sizes of cables. Facilities terminal blocks, gland plates and glands suitable for different sizes of cables. Facilities shall be provided for earthing the CT secondary wires in the junction box.shall be provided for earthing the CT secondary wires in the junction box.

6.86.8 Hollow porcelain insulatorsHollow porcelain insulators

The insulators of the current transformers shall conform to latest edition of IS: 5621 and The insulators of the current transformers shall conform to latest edition of IS: 5621 and shall be subjected to and successfully pass the tests listed in this standard and in IEC: shall be subjected to and successfully pass the tests listed in this standard and in IEC: 233. The hollow porcelain insulators shall be brown glazed and shall meet the 233. The hollow porcelain insulators shall be brown glazed and shall meet the requirements indicated in this specification. The insulators shall be cemented with requirements indicated in this specification. The insulators shall be cemented with Portland cement to the flanges resulting in high mechanical, tensile and breaking Portland cement to the flanges resulting in high mechanical, tensile and breaking strength.strength.

6.96.9 Insulation levelInsulation level


The current transformers shall be designed to withstand impulse test voltages and power The current transformers shall be designed to withstand impulse test voltages and power frequency test voltages as specified in this specificationfrequency test voltages as specified in this specification

6.106.10 Terminal connections Terminal connections The CTs shall be provided with bi-metallic solderless clamp and rigid type terminal The CTs shall be provided with bi-metallic solderless clamp and rigid type terminal connectors on the top tank for connection to the HV terminals. The other requirements connectors on the top tank for connection to the HV terminals. The other requirements shall be same as for the terminal connectors of the circuit breaker described in this shall be same as for the terminal connectors of the circuit breaker described in this specification. They shall be universal type suitable for both horizontal and vertical specification. They shall be universal type suitable for both horizontal and vertical connections.connections.Two earthing terminals complete with necessary hardware shall be provided on each CT Two earthing terminals complete with necessary hardware shall be provided on each CT for connecting to earth continuity conductor to be provided. The earthing terminals shall for connecting to earth continuity conductor to be provided. The earthing terminals shall be identified by means of appropriate symbol marked in a legible and indelible manner be identified by means of appropriate symbol marked in a legible and indelible manner adjacent to the terminals. The terminals shall be adequately sized to meet the full earth adjacent to the terminals. The terminals shall be adequately sized to meet the full earth fault current envisaged.fault current envisaged.

6.116.11 Basic technical requirementBasic technical requirementRatings: The CTs shall conform to the following ratings and other particulars of the Ratings: The CTs shall conform to the following ratings and other particulars of the circuit breakers:circuit breakers:

Technical Requirements Technical Requirements

Sl.Sl. No.No.

ParticularsParticulars Requirements Requirements

1.1. Function Function To control the secondary side of 33/11 KV power transformers of ratingsTo control the secondary side of 33/11 KV power transformers of ratings between 1.6 MVA and 10 MVA in primary substations and feeders.between 1.6 MVA and 10 MVA in primary substations and feeders.

2.2. Requirement Requirement Core - 1 : Instrumentation and MeteringCore - 1 : Instrumentation and MeteringCore - 2 : Combined Over current and earth fault protection Core - 2 : Combined Over current and earth fault protection Core - 3 : Differential ProtectionCore - 3 : Differential Protection

3.3. Transformation RatioTransformation Ratio 200-100-50/5-5-5A200-100-50/5-5-5A

4.4. Rated Burden (VA)Rated Burden (VA) Core : 1: 30Core : 1: 30Core : 2: 30Core : 2: 30Core : 3: PSCore : 3: PS

5.5. Class of AccuracyClass of Accuracy Core –1 : 0.5Core –1 : 0.5Core –2 : 5 P Core –2 : 5 P Core –3 : PS Core –3 : PS

6.6. Instrument Security FactorInstrument Security Factor Core - 1 : 5Core - 1 : 5

7.7. Accuracy Limit FactorAccuracy Limit Factor Core - 2 : 20Core - 2 : 20Core - 3 : 20Core - 3 : 20

8.8. Rated VoltageRated Voltage 36 KV36 KV

9.9. Short Time RatingShort Time Rating 31 KA rms for 3 seconds 31 KA rms for 3 seconds

10.10. Creepage distance Creepage distance Protected creepage distance Protected creepage distance

900 mm minimum 900 mm minimum 450 mm minimum450 mm minimum

11.11. Insulation Level :Insulation Level :- Impulse Voltage 1.2/50µs- Impulse Voltage 1.2/50µs wave withstand level wave withstand level- Power frequency 1 min - Power frequency 1 min voltage withstand levelvoltage withstand level

170 KV170 KV

70 KV70 KV

6.126.12 Tests and inspections Tests and inspections


The CTs shall be tested in accordance with the requirements of the type tests and routine The CTs shall be tested in accordance with the requirements of the type tests and routine tests as per the latest issues of IEC: 185 or IS: 2705.tests as per the latest issues of IEC: 185 or IS: 2705.

The tests to be conducted shall include:The tests to be conducted shall include:

6.12.16.12.1 Type TestsType Tests::

Lightning impulse voltage;Lightning impulse voltage;

Power frequency wet withstand voltage;Power frequency wet withstand voltage;

Temperature rise;Temperature rise;

Short time current;Short time current;

Composite error;Composite error;

Accuracy test (for measuring core);Accuracy test (for measuring core);

Instrument security current (for measuring core);Instrument security current (for measuring core);

Current error and phase displacement (for protection core) Current error and phase displacement (for protection core)

6.12.26.12.2 Routine testsRoutine tests

Verification of terminal marking and polarity;Verification of terminal marking and polarity;

Power frequency dry withstand test on primary windings;Power frequency dry withstand test on primary windings;

Power frequency dry withstand test on secondary windings;Power frequency dry withstand test on secondary windings;

Power frequency dry withstand test between sections;Power frequency dry withstand test between sections;

Over voltage inter-turn test;Over voltage inter-turn test;


Turn ratio;Turn ratio;


Current error and phase displacement (for protection core);Current error and phase displacement (for protection core);

Knee point voltage and magnetizing current test (for PS class);Knee point voltage and magnetizing current test (for PS class);

Secondary winding resistance ( for PS class )Secondary winding resistance ( for PS class )

Insulation Resistance Test.Insulation Resistance Test.

7.7. POTENTIAL TRANSFORMERPOTENTIAL TRANSFORMER

7.17.1 BASIC TECHNICAL REQUIREMENTSBASIC TECHNICAL REQUIREMENTS


The 33 KV outdoor voltage transformers are required to meet the following basic The 33 KV outdoor voltage transformers are required to meet the following basic technical requirements (Reference standards: IEC: 186, IS: 3156 and associated technical requirements (Reference standards: IEC: 186, IS: 3156 and associated standards listed in the specification):standards listed in the specification):

Sl. No.Sl. No. Particulars Particulars RequirementRequirement11 TypeType Single phaseSingle phase

22 Nominal system voltage, phase to phaseNominal system voltage, phase to phase 33 KV33 KV

33 Application Application Instrumentation, Metering and ProtectionInstrumentation, Metering and Protection

44 Number of secondary windingsNumber of secondary windings 11

55 Rated normal burden*Rated normal burden* 200 VA200 VA

66 Rated primary voltageRated primary voltage 33 KV / √ 333 KV / √ 3

77 Rated secondary voltageRated secondary voltage 110 V / √ 3/110/ √3110 V / √ 3/110/ √3

88 Class of accuracyClass of accuracy 0.50.5

99 Rated insulation level : (Primary winding) (Phase to earth)Rated insulation level : (Primary winding) (Phase to earth)

i)i) One minute power frequency withstand voltage to earth (wetOne minute power frequency withstand voltage to earth (wet and dry ) rmsand dry ) rms

70 KV70 KV

ii)ii) Impulse withstand voltage to earth with 1.2/50 µsec. waveImpulse withstand voltage to earth with 1.2/50 µsec. wave of +ve and –ve polarity (Peak )of +ve and –ve polarity (Peak )

170 KV170 KV

1010 One minute Power Frequency withstand voltage ofOne minute Power Frequency withstand voltage of Secondary windings (rms)Secondary windings (rms)

i)i) Between phase to earthBetween phase to earth 3 KV 3 KV ii)ii) Between sectionsBetween sections 3 KV 3 KV 1111 Rated Voltage factorRated Voltage factor

i)i) ContinuousContinuous 1.21.2

ii)ii) for 30 secondsfor 30 seconds 1.51.5

1212 Creepage distance to earth in mm per KV of highest phaseCreepage distance to earth in mm per KV of highest phase to phase system voltageto phase system voltage

2525

* The burden indicated is the minimum acceptable to the Employer. The Contractor shall ensure that the* The burden indicated is the minimum acceptable to the Employer. The Contractor shall ensure that the

rated output of the voltage transformers are adequate to meet at least 120 percent of the connected loadrated output of the voltage transformers are adequate to meet at least 120 percent of the connected load

(burden).(burden).

7.17.1 GENERALGENERALThe voltage transformers to be supplied under this specification shall be of outdoor, The voltage transformers to be supplied under this specification shall be of outdoor, single phase, dead tank double wound, oil immersed type, complying with IEC: 185 and single phase, dead tank double wound, oil immersed type, complying with IEC: 185 and IS: 3156 suitable for operation in hot and humid atmospheric conditions described in this IS: 3156 suitable for operation in hot and humid atmospheric conditions described in this document. To prevent corrosion of the exposed surfaces, the tank should be hot dip document. To prevent corrosion of the exposed surfaces, the tank should be hot dip galvanized. They shall have separate HV and LV windings and shall be suitable for use asgalvanized. They shall have separate HV and LV windings and shall be suitable for use as bus VTs in 33/11 KV primary substationsbus VTs in 33/11 KV primary substations. .

7.27.2 Duty requirementDuty requirement

33 KV Voltage transformer for all the indicating instruments and measuring meters in the 33 KV Voltage transformer for all the indicating instruments and measuring meters in the primary substation on 33 KV side.primary substation on 33 KV side.


7.37.3 PORCELAIN INSULATORPORCELAIN INSULATOR

External parts of the voltage transformers which are under continuous electrical stress External parts of the voltage transformers which are under continuous electrical stress shall be of hollow porcelain insulators complying with latest edition of IS: 5621 tested as shall be of hollow porcelain insulators complying with latest edition of IS: 5621 tested as per IEC: 233. The creepage and flashover distance of the insulators shall be dimensioned per IEC: 233. The creepage and flashover distance of the insulators shall be dimensioned and the type and profile designed in accordance with IEC: 815 or IS: 13134 and shall be and the type and profile designed in accordance with IEC: 815 or IS: 13134 and shall be suitable for the worst environmental conditions for heavily polluted atmosphere and shall suitable for the worst environmental conditions for heavily polluted atmosphere and shall be not less than 25 mm per KV of highest phase to phase system voltage with protected be not less than 25 mm per KV of highest phase to phase system voltage with protected creepage distance minimum 50 percent of the total. Internal surfaces of hollow insulators creepage distance minimum 50 percent of the total. Internal surfaces of hollow insulators shall also be glazed.shall also be glazed.

The insulators shall be cemented with Portland cement to the flanges resulting in high The insulators shall be cemented with Portland cement to the flanges resulting in high mechanical, tensile and breaking strength.mechanical, tensile and breaking strength.

All porcelain used on the voltage transformers shall have the following properties high All porcelain used on the voltage transformers shall have the following properties high strength, homogeneity, uniform glaze, free from cavities and other flaws and a high strength, homogeneity, uniform glaze, free from cavities and other flaws and a high quality uniform finish Porcelain components shall withstand the maximum expected staticquality uniform finish Porcelain components shall withstand the maximum expected static and dynamic loads to which the voltage transformers may be subjected during their and dynamic loads to which the voltage transformers may be subjected during their service life.service life.

The insulation of the hollow porcelain insulators shall be coordinated with that of the The insulation of the hollow porcelain insulators shall be coordinated with that of the voltage transformers to ensure that any flash over occurs only externally.voltage transformers to ensure that any flash over occurs only externally.

7.47.4 CORECORE

High grade non-ageing cold rolled grain oriented silicone steel of low hysteresis loss and High grade non-ageing cold rolled grain oriented silicone steel of low hysteresis loss and permeability shall be used for core so as to ensure accuracy at both normal and or over permeability shall be used for core so as to ensure accuracy at both normal and or over voltages. The flux density shall be limited to 1.6 Tesla at normal voltage and frequency. voltages. The flux density shall be limited to 1.6 Tesla at normal voltage and frequency. There shall be no saturation at any stage during operation. There shall be no saturation at any stage during operation.

The instrument security factor of the core shall be low enough so as not to cause damage The instrument security factor of the core shall be low enough so as not to cause damage to the instruments in the event of maximum short circuit current or over voltages.to the instruments in the event of maximum short circuit current or over voltages.

7.57.5 WINDINGSWINDINGS

The primary and secondary windings shall be electrolytic copper of high purity and The primary and secondary windings shall be electrolytic copper of high purity and conductivity and covered with double paper insulation. The conductor shall be of conductivity and covered with double paper insulation. The conductor shall be of adequate cross-section so as to limit the temperature rise even during maximum over adequate cross-section so as to limit the temperature rise even during maximum over voltages. voltages.

The insulation of windings and connections shall be free from composition liable to The insulation of windings and connections shall be free from composition liable to soften, ooze, shrink or collapse during service.soften, ooze, shrink or collapse during service.

The current rating of the primary winding shall be one hundred and fifty percent of the The current rating of the primary winding shall be one hundred and fifty percent of the normal rated burden and the windings shall be suitable to withstand continuously the normal rated burden and the windings shall be suitable to withstand continuously the maximum system voltage.maximum system voltage.

The secondary windings of the voltage transformers shall also be suitable for continuous The secondary windings of the voltage transformers shall also be suitable for continuous over voltages corresponding to the maximum system voltage at the primary winding. The over voltages corresponding to the maximum system voltage at the primary winding. The winding supports shall be suitably reinforced to withstand normal handling and the winding supports shall be suitably reinforced to withstand normal handling and the thermal and dynamic stresses during operation without damage.thermal and dynamic stresses during operation without damage.


The voltage transformer secondary circuits will be taken out to form the star point and The voltage transformer secondary circuits will be taken out to form the star point and earthed at one point outside the voltage transformers.earthed at one point outside the voltage transformers.

Both primary and secondary winding terminals shall be clearly and indelibly marked to Both primary and secondary winding terminals shall be clearly and indelibly marked to show polarity in accordance with IEC: 186. The connections required for different show polarity in accordance with IEC: 186. The connections required for different secondary windings in case of multi-winding voltage transformers shall be clearly secondary windings in case of multi-winding voltage transformers shall be clearly indicated in terminal blocks and the wiring diagrams.indicated in terminal blocks and the wiring diagrams.

7.67.6 TANKTANK

Both expansion chamber and tank of the voltage transformers shall be made of high Both expansion chamber and tank of the voltage transformers shall be made of high quality steel and shall be hot dip galvanized and shall be able to withstand the stresses quality steel and shall be hot dip galvanized and shall be able to withstand the stresses occurring during transit and all thermal and mechanical stresses resulting from maximum occurring during transit and all thermal and mechanical stresses resulting from maximum short circuit current during operation. short circuit current during operation.

7.77.7 INSULATING OILINSULATING OIL

The voltage transformers shall be supplied filled with new insulating oil. The oil shall conform toThe voltage transformers shall be supplied filled with new insulating oil. The oil shall conform to the requirements of latest issue of IEC: 296 of IS: 335. The quantity of insulating oil for firstthe requirements of latest issue of IEC: 296 of IS: 335. The quantity of insulating oil for first filling of the equipment and complete specification of oil proposed to be used shall be stated infilling of the equipment and complete specification of oil proposed to be used shall be stated in the bid.the bid.

7.87.8 HERMETIC SEALING HERMETIC SEALING

The voltage transformers shall be supplied filled with insulating oil and shall be The voltage transformers shall be supplied filled with insulating oil and shall be hermetically sealed to prevent atmosphere coming in contact with oil, avoiding filtration hermetically sealed to prevent atmosphere coming in contact with oil, avoiding filtration and change of oil. Nitrogen or other inert gas shall be provided above the oil surface to and change of oil. Nitrogen or other inert gas shall be provided above the oil surface to permit expansion and contraction of oil. Provision shall be made for draining and re-permit expansion and contraction of oil. Provision shall be made for draining and re-filling the insulating oilfilling the insulating oil

7.97.9 FITTING AND ACCESSORIES FITTING AND ACCESSORIES

Fittings and accessories listed below shall be supplied with each voltage transformer:Fittings and accessories listed below shall be supplied with each voltage transformer:

oil level gaugeoil level gauge oil drain, sampling and filling hole with cap;oil drain, sampling and filling hole with cap; pressure relief device;pressure relief device; H.V terminal;H.V terminal; two earthing terminals with necessary nuts, bolts and washers;two earthing terminals with necessary nuts, bolts and washers; name and rating plate;name and rating plate; secondary terminal box with LV terminal connections;secondary terminal box with LV terminal connections; mounting nuts, bolts and washers;mounting nuts, bolts and washers; L.V HRC cartridge fuses for the protection of secondary winding.L.V HRC cartridge fuses for the protection of secondary winding.

Any other fitting deemed essential by the Contractor shall also be supplied alongwith Any other fitting deemed essential by the Contractor shall also be supplied alongwith each voltage transformer:each voltage transformer:

The oil level gauge shall be mounted in such a way that the oil level can be clearly seen The oil level gauge shall be mounted in such a way that the oil level can be clearly seen from ground level.from ground level.

The name and rating plate shall contain all the particulars as provided in IEC: 186 and The name and rating plate shall contain all the particulars as provided in IEC: 186 and also the name of the employer and year of manufacture. They shall comply with the also the name of the employer and year of manufacture. They shall comply with the clause termed label in this specification.clause termed label in this specification.

7.107.10 SECONDARY TERMINAL BOXSECONDARY TERMINAL BOX


A dust, vermin and weather proof terminal box shall be provided at the lower end of each A dust, vermin and weather proof terminal box shall be provided at the lower end of each voltage transformer for terminating the secondary windings. The box shall have a bolted voltage transformer for terminating the secondary windings. The box shall have a bolted removable cover plate complete with gaskets. The terminal box shall have cable gland removable cover plate complete with gaskets. The terminal box shall have cable gland plate and cable glands with shrouds suitable for entry of 4 core x 2.5 mmplate and cable glands with shrouds suitable for entry of 4 core x 2.5 mm2 2 PVC insulated PVC insulated control cables as per IEC: 227 or IS: 1554 .control cables as per IEC: 227 or IS: 1554 .

For 33 KV Voltage Transformer one 4 core 2.5 mmFor 33 KV Voltage Transformer one 4 core 2.5 mm22

The terminal box enclosure shall have protection of class IP 55 as defined in IEC: 529 or The terminal box enclosure shall have protection of class IP 55 as defined in IEC: 529 or IS: 13947 and shall be painted or galvanized in accordance with specification of Surface IS: 13947 and shall be painted or galvanized in accordance with specification of Surface Treatment Treatment

7.117.11 Terminal blocksTerminal blocks

Terminal blocks of brass studs rated for 10 Amps continuous current, 650 Volt grade Terminal blocks of brass studs rated for 10 Amps continuous current, 650 Volt grade enclosed in moulded insulating materials shall be provided with adequate electrical enclosed in moulded insulating materials shall be provided with adequate electrical clearance for terminating the secondary wiring and outgoing connections. The terminal clearance for terminating the secondary wiring and outgoing connections. The terminal blocks shall be suitable for termination of 2.5 mmblocks shall be suitable for termination of 2.5 mm22 wires. The termination shall be made wires. The termination shall be made by crimping lugs or bare wires with insulating sleeves at ends. All terminals must be by crimping lugs or bare wires with insulating sleeves at ends. All terminals must be marked with numbers and wire termination provided with numbered ferrules for marked with numbers and wire termination provided with numbered ferrules for identification.identification.

7.127.12 Fuse protectionFuse protection

The secondary windings shall be protected by HRC cartridge fuses in fuse holder The secondary windings shall be protected by HRC cartridge fuses in fuse holder consisting of carriers and bases. The carriers and bases shall be of high grade flame consisting of carriers and bases. The carriers and bases shall be of high grade flame retarding and non hygroscopic moulded insulation materials with hard glass surface. Eachretarding and non hygroscopic moulded insulation materials with hard glass surface. Each fuse shall be identified with engraved plastic label.fuse shall be identified with engraved plastic label.

7.137.13 Circuit diagramCircuit diagram

A durable copy of the circuit wiring diagram shall be affixed to the inner side of the A durable copy of the circuit wiring diagram shall be affixed to the inner side of the terminal box cover. Labels shall be provided inside the cover to describe the functions of terminal box cover. Labels shall be provided inside the cover to describe the functions of various items of equipmentsvarious items of equipments

7.147.14 TERMINATION TERMINATION

The equipment shall be supplied with HV electrical connection terminals of a size and The equipment shall be supplied with HV electrical connection terminals of a size and rating appropriate for all the duties, including overload duty specified for the equipment. rating appropriate for all the duties, including overload duty specified for the equipment. The terminals shall be of the bi-metallic type, suitable for connection of all aluminium The terminals shall be of the bi-metallic type, suitable for connection of all aluminium alloy conductor (ACSR Zebra) or aluminium conductor steel reinforced (ACSR). In alloy conductor (ACSR Zebra) or aluminium conductor steel reinforced (ACSR). In general connections using palm type solderless sockets shall be preferred. The proposed general connections using palm type solderless sockets shall be preferred. The proposed method of connection shall be stated in the offer and shall be subject to approval by the method of connection shall be stated in the offer and shall be subject to approval by the D.H. (Elect). Where the terminals are of the clamp type, they shall be suitable for taking aD.H. (Elect). Where the terminals are of the clamp type, they shall be suitable for taking a range of conductors appropriate to the rating of the equipment.range of conductors appropriate to the rating of the equipment.

All nuts, bolts, washes and spring washers required to complete the connection shall be All nuts, bolts, washes and spring washers required to complete the connection shall be supplied with the equipment.supplied with the equipment.

7.157.15 EARTHING TERMINALEARTHING TERMINAL

Two earthing terminals complete with necessary hardware shall be provided on each Two earthing terminals complete with necessary hardware shall be provided on each voltage transformer for connecting to earth continuity conductors of the Employer. They voltage transformer for connecting to earth continuity conductors of the Employer. They shall be of electroplated brass and of adequate size to carry the earth fault current.shall be of electroplated brass and of adequate size to carry the earth fault current.


The earthing terminals shall be identified by means of appropriate symbol marked in a The earthing terminals shall be identified by means of appropriate symbol marked in a legible and indelible manner adjacent to the terminals.legible and indelible manner adjacent to the terminals.

7.167.16 TESTS AND INSPECTIONS TESTS AND INSPECTIONS

The voltage transformers shall be tested in accordance with the requirements of the type The voltage transformers shall be tested in accordance with the requirements of the type tests and routine tests as provided in the latest issues of IEC: 186 of IS: 3516.tests and routine tests as provided in the latest issues of IEC: 186 of IS: 3516.

The tests to be conducted shall include;The tests to be conducted shall include;

7.16.17.16.1 Type tests (certificates to be furnished) Type tests (certificates to be furnished)

Lightning impulse voltage test;Lightning impulse voltage test;

High voltage power frequency wet withstand voltage;High voltage power frequency wet withstand voltage;

Temperature rise test;Temperature rise test;

Short circuit withstand capability test;Short circuit withstand capability test;

Determination of limits of voltage error and phase displacement.Determination of limits of voltage error and phase displacement.

7.16.27.16.2 Routine tests :Routine tests :

oo Verification of terminal marking and polarity;Verification of terminal marking and polarity;

oo Power frequency withstand tests on primary winding;Power frequency withstand tests on primary winding;

oo Power frequency dry withstand tests on secondary winding;Power frequency dry withstand tests on secondary winding;

oo Power frequency withstand tests between sections;Power frequency withstand tests between sections;

oo Determination of limits of voltage errors and phase displacement;Determination of limits of voltage errors and phase displacement;

oo Partial discharge measurementPartial discharge measurement..

oo Insulation Resistance measurement.Insulation Resistance measurement.

7.177.17 TEMPERATURE RISETEMPERATURE RISE

The temperature rise of any part of the voltage transformer under continuous operation The temperature rise of any part of the voltage transformer under continuous operation and exposed in the direct rays of the sun shall not exceed the permissible limits as and exposed in the direct rays of the sun shall not exceed the permissible limits as provided in IEC publication 186 or IS: 3156. These shall not be exceeded when corrected provided in IEC publication 186 or IS: 3156. These shall not be exceeded when corrected for the difference between the ambient temperature at site and the ambient temperature for the difference between the ambient temperature at site and the ambient temperature specified in the standard. The correction proposed shall be stated in the bid.specified in the standard. The correction proposed shall be stated in the bid.

8.8. PROTECTIVE RELAY & CONTROL PANELPROTECTIVE RELAY & CONTROL PANEL

Outdoor Control panels with protective relay and meters shall be provided by the supplierOutdoor Control panels with protective relay and meters shall be provided by the supplier suitable for above breakers. The equipment shall have protection scheme with the suitable for above breakers. The equipment shall have protection scheme with the following relays:following relays:

(i)(i) Triple pole IDMTL type combined over current ( 2 Nos.) & Earth fault ( 1 No) Triple pole IDMTL type combined over current ( 2 Nos.) & Earth fault ( 1 No) relay ( Draw out type ) preferably Non-communicable numerical relay.relay ( Draw out type ) preferably Non-communicable numerical relay.

Plug setting range of the over current and earth fault relays shall be 5% to 250%.Plug setting range of the over current and earth fault relays shall be 5% to 250%.


(ii)(ii) 3 elements auxiliary relay for transformer fault, trip for Buchholz, winding 3 elements auxiliary relay for transformer fault, trip for Buchholz, winding temperature & oil temperaturetemperature & oil temperature

(iii)(iii) Master trip relay for inter tripping Master trip relay for inter tripping

(iv ) Differential Relay (iv ) Differential Relay

(v) One alarm bell scheme with bell (110 V DC)(v) One alarm bell scheme with bell (110 V DC)N.B :- The relays should be Areva, Easun Rerolle, Ashida, ABB. Any deviation should beN.B :- The relays should be Areva, Easun Rerolle, Ashida, ABB. Any deviation should be mentioned.mentioned.

9.9. METERS :METERS :

The following meters shall be provided.The following meters shall be provided.

i) Ammeter: - 1 No., 0 – 100 – 200 A/ 5 Amp Preferable Make – IMP / AE or any reputedi) Ammeter: - 1 No., 0 – 100 – 200 A/ 5 Amp Preferable Make – IMP / AE or any reputed make (Dial type or Digital).make (Dial type or Digital).

ii) Volt meter: - 1 No., 0 - 40 KV (size: 144 mm X 144 mm), make IMP / AE or any ii) Volt meter: - 1 No., 0 - 40 KV (size: 144 mm X 144 mm), make IMP / AE or any reputed make (Dial type or Digital).reputed make (Dial type or Digital).

iii) Ammeter selector switch – 1 No. Make – Kaycee or any other reputed makeiii) Ammeter selector switch – 1 No. Make – Kaycee or any other reputed make

iv) Volt meter selector switch – 1 No. Make – Kaycee or any other reputed makeiv) Volt meter selector switch – 1 No. Make – Kaycee or any other reputed make

v) 40 watt lamp with switch – 1Nov) 40 watt lamp with switch – 1No

vi) Plug & Socket - 1 No.vi) Plug & Socket - 1 No.

vii) Fuses & Links – 1 No.vii) Fuses & Links – 1 No.

viii) Test terminal Blocks – Test terminal Block need be provided for testing relays & viii) Test terminal Blocks – Test terminal Block need be provided for testing relays & breakers.breakers.

ix) Indication Lamp - Red - Breaker ‘ON’ix) Indication Lamp - Red - Breaker ‘ON’ (24V DC LED type) Green - Breaker ‘OFF’ (24V DC LED type) Green - Breaker ‘OFF’ Amber – Breaker ‘AUTO TRIP’ Amber – Breaker ‘AUTO TRIP’ Blue – Spring charge indication Blue – Spring charge indication White – Healthy Trip illuminated push bottom switch White – Healthy Trip illuminated push bottom switch

10.10. OTHER EQUIPMENTSOTHER EQUIPMENTS

10.110.1 Out Door Control - Relay PanelOut Door Control - Relay Panel10.1.110.1.1 General General

The electrical controls, relays, instruments, meters, annunciation scheme shall be The electrical controls, relays, instruments, meters, annunciation scheme shall be provided in a sheet steel enclosure conforming to IEC: 298 or IS: 3427 mounted on provided in a sheet steel enclosure conforming to IEC: 298 or IS: 3427 mounted on support base on the floor. The panel shall be free standing, dust, moisture and rodent and support base on the floor. The panel shall be free standing, dust, moisture and rodent and vermin proof suitable for outdoor installation. The panel shall have a high degree of vermin proof suitable for outdoor installation. The panel shall have a high degree of protection for outdoor installation with relevant standard.protection for outdoor installation with relevant standard.

Each panel shall comprise of rigid welded structure frame enclosed completely by metal Each panel shall comprise of rigid welded structure frame enclosed completely by metal sheet of thickness not less than 2 mm. The sheets shall be cold rolled with smooth finish sheet of thickness not less than 2 mm. The sheets shall be cold rolled with smooth finish levelled and free from flaws. The structural frame and all load bearing members of the levelled and free from flaws. The structural frame and all load bearing members of the enclosure shall have minimum thickness of 2.5 mm.enclosure shall have minimum thickness of 2.5 mm.


The enclosure shall have hinged door at the front and back for access to the low voltage The enclosure shall have hinged door at the front and back for access to the low voltage wiring. All door panels and removable covers shall be gasketed all round with neoprene wiring. All door panels and removable covers shall be gasketed all round with neoprene bonded gasket. Ventilating louvers shall be provided to limit the temperature rise as bonded gasket. Ventilating louvers shall be provided to limit the temperature rise as provided in IEC: 694 and 298 or IS: 12729 and 3427. They shall be provided with filters provided in IEC: 694 and 298 or IS: 12729 and 3427. They shall be provided with filters encased in fine wire screens for non-ferrous metal or stainless steel unaffected by encased in fine wire screens for non-ferrous metal or stainless steel unaffected by moisture and rain water. A 230 V AC heater with auto temperature control shall be moisture and rain water. A 230 V AC heater with auto temperature control shall be provided in the cabinet to prevent moisture condensation.provided in the cabinet to prevent moisture condensation.

The housing shall be surface treated and painted in accordance with the clause on Surface The housing shall be surface treated and painted in accordance with the clause on Surface Treatment of this specification. Treatment of this specification.

10.1.210.1.2 Panel wiring and accessories Panel wiring and accessories

10.1.310.1.3 Wiring Wiring

Each panel shall be supplied with all internal wiring complete.Each panel shall be supplied with all internal wiring complete.

Panel wiring shall be suitably bunched and clamped for neat appearance. The conductors Panel wiring shall be suitably bunched and clamped for neat appearance. The conductors used for wiring purpose shall be PVC insulated 650 / 1100 volt grade semi-flexible heat used for wiring purpose shall be PVC insulated 650 / 1100 volt grade semi-flexible heat resistant, flame retardant and vermin proof electrolytic copper cable conforming to IEC: resistant, flame retardant and vermin proof electrolytic copper cable conforming to IEC: 227, 502 or IS: 1554. The wiring shall be securely supported and taken through PVC 227, 502 or IS: 1554. The wiring shall be securely supported and taken through PVC troughs. Each wire shall be continuous from end to end without any joint in between. All troughs. Each wire shall be continuous from end to end without any joint in between. All panel wiring shall be capable of withstanding a voltage of 2 KV AC 50 Hz for one panel wiring shall be capable of withstanding a voltage of 2 KV AC 50 Hz for one minute.minute.

Cable and wire for connections within the switchgear and between the switchgear and Cable and wire for connections within the switchgear and between the switchgear and terminal blocks shall have a minimum temperature rating of 90 degree Celsius. The sizes terminal blocks shall have a minimum temperature rating of 90 degree Celsius. The sizes of the conductors for panel wiring shall be not less than 2.5 mmof the conductors for panel wiring shall be not less than 2.5 mm22. For CT secondary . For CT secondary wiring, two such wires shall be used in parallel.wiring, two such wires shall be used in parallel.

10.1.410.1.4 Panel wiring protection Panel wiring protection

The panels shall be equipped with links and HRC cartridge fuses conforming to IEC :269 The panels shall be equipped with links and HRC cartridge fuses conforming to IEC :269 or IS : 13703 in 650 Volt grade phenolic moulded fuse holder consisting of fuse carrier or IS : 13703 in 650 Volt grade phenolic moulded fuse holder consisting of fuse carrier and base or miniature circuit breakers conforming to IEC : 947-2 or IS : 13947-2 at and base or miniature circuit breakers conforming to IEC : 947-2 or IS : 13947-2 at appropriate locations. The carriers and bases shall be made of high grade flame retardant appropriate locations. The carriers and bases shall be made of high grade flame retardant and non hygroscopic phenolic moulded material with hard glass surface. Each fuse or and non hygroscopic phenolic moulded material with hard glass surface. Each fuse or MCB shall be identified with engraved plastic label.MCB shall be identified with engraved plastic label.

In general, fuses and MCBs shall be limited to the minimum required for safety. The In general, fuses and MCBs shall be limited to the minimum required for safety. The protection scheme shall include fuses for VT secondary circuits and DC supply to each protection scheme shall include fuses for VT secondary circuits and DC supply to each panel and fuses or MCB for spring charging motor and incoming AC supply.panel and fuses or MCB for spring charging motor and incoming AC supply.

10.1.510.1.5 Terminal blocks Terminal blocks

Terminal blocks of brass studs rated for 10 amps. continuous current, 650 volt DC gradeTerminal blocks of brass studs rated for 10 amps. continuous current, 650 volt DC grade covered by moulded insulating materials with adequate electrical clearances shall becovered by moulded insulating materials with adequate electrical clearances shall be provided for terminating the panel wiring and outgoing connections. The terminationprovided for terminating the panel wiring and outgoing connections. The termination shall be made by crimping lugs or bare conductor with insulating sleeves at ends. Theshall be made by crimping lugs or bare conductor with insulating sleeves at ends. The arrangement can be horizontal or vertical as per standard practice adopted by thearrangement can be horizontal or vertical as per standard practice adopted by the manufacturer. All terminals must be numbered and wire termination provided withmanufacturer. All terminals must be numbered and wire termination provided with numbered ferrules for identification. All numbering and marking including those innumbered ferrules for identification. All numbering and marking including those in


wiring diagram shall follow the guidelines provided in IS : 11353. All circuit breakerwiring diagram shall follow the guidelines provided in IS : 11353. All circuit breaker auxiliary contracts including spare contacts shall be wired to the terminal blocks. Tenauxiliary contracts including spare contacts shall be wired to the terminal blocks. Ten percent spare terminals shall be provided.percent spare terminals shall be provided.

10.1.610.1.6 Colour and numbering Colour and numbering

The wiring used for 230 V AC supply for illumination lamp, panel heater and otherThe wiring used for 230 V AC supply for illumination lamp, panel heater and other devices shall be coloured red for phase wire and black for the neutral. The colour of wiresdevices shall be coloured red for phase wire and black for the neutral. The colour of wires connecting directly to Earth shall be black. All other panel wires shall be of one colour toconnecting directly to Earth shall be black. All other panel wires shall be of one colour to be approved.be approved.

Engraved core identification plastic ferrules marked to correspond with the panel wiringEngraved core identification plastic ferrules marked to correspond with the panel wiring diagram shall be fixed at both ends of each wire. Ferrules shall fit tightly on the wire anddiagram shall be fixed at both ends of each wire. Ferrules shall fit tightly on the wire and shall not fall off when the wire is disconnected from the terminal block. Numbers 6 and 9,shall not fall off when the wire is disconnected from the terminal block. Numbers 6 and 9, if used shall be under scored to enable differentiation. if used shall be under scored to enable differentiation.

10.1.710.1.7 Circuit diagramCircuit diagram

A durable copy of the circuit wiring diagram shall be affixed to the inner side of the doorA durable copy of the circuit wiring diagram shall be affixed to the inner side of the door of the switchgear compartment. Labels shall be provided inside the compartment toof the switchgear compartment. Labels shall be provided inside the compartment to describe the functions of the various items of equipment.describe the functions of the various items of equipment.

The scope of supply shall include the panel mounting base plate and all specialThe scope of supply shall include the panel mounting base plate and all special equipment, bolts, nuts and washers necessary for making the supporting.equipment, bolts, nuts and washers necessary for making the supporting.

10.210.2 Supporting Structure Supporting Structure

The supply of the material shall be complete with mounting structures of mild steelThe supply of the material shall be complete with mounting structures of mild steel sections conforming to IS:226 or equivalent ISO. The supporting structure shall besections conforming to IS:226 or equivalent ISO. The supporting structure shall be designed and constructed to withstand the maximum combined effects of the circuitdesigned and constructed to withstand the maximum combined effects of the circuit breaker dead weight, its maximum dynamic load and maximum effect of wind loading.breaker dead weight, its maximum dynamic load and maximum effect of wind loading. The supporting structure shall be hot dip galvanized as per clause on surface treatment ofThe supporting structure shall be hot dip galvanized as per clause on surface treatment of this specification.this specification.

10.310.3 CT and PT mounting bracketCT and PT mounting bracket

The supporting structure shall be fitted with a bracket for supporting the three oil filled 33The supporting structure shall be fitted with a bracket for supporting the three oil filled 33 KV single phase current transformers and 3 Nos. 33 KV ( 1 phase) PTs. The supportKV single phase current transformers and 3 Nos. 33 KV ( 1 phase) PTs. The support bracket shall be provided opposite the circuit breaker poles and shall ensure adequatebracket shall be provided opposite the circuit breaker poles and shall ensure adequate clearance between the breaker poles and the CTs as well as between the CTs & PTs. Theclearance between the breaker poles and the CTs as well as between the CTs & PTs. The CTs & PTs shall be supplied by the Supplier as per specification above and is included inCTs & PTs shall be supplied by the Supplier as per specification above and is included in the scope. The drawings of the structure with bracket shall be subject to Purchaser’sthe scope. The drawings of the structure with bracket shall be subject to Purchaser’s approval before fabricationapproval before fabrication

The CT & PT mounting bracket shall be hot dip galvanised as per clause on surfaceThe CT & PT mounting bracket shall be hot dip galvanised as per clause on surface treatment of this specification.treatment of this specification.

10.410.4 Local control cabinetLocal control cabinet

The operating machanism, local controls and monitoring shall be provided in a metal cladThe operating machanism, local controls and monitoring shall be provided in a metal clad control cabinet fitted to the same structure supporting the breaker and mounted at acontrol cabinet fitted to the same structure supporting the breaker and mounted at a


convenient height for safe operation from ground level or from a platform to be suppliedconvenient height for safe operation from ground level or from a platform to be supplied under the contract.under the contract.

The cabinet shall be made of minimum 2.00 mm sheet steel and shall be constructed as aThe cabinet shall be made of minimum 2.00 mm sheet steel and shall be constructed as a dust, weather and vermin proof outdoor housing with protection of IP-54 class as defineddust, weather and vermin proof outdoor housing with protection of IP-54 class as defined in IEC:529 or IS:13947. It shall have single door and transparent windows for reading thein IEC:529 or IS:13947. It shall have single door and transparent windows for reading the circuit breaker ON or OFF position and spring charge position without opening the door.circuit breaker ON or OFF position and spring charge position without opening the door. The door and any removable covers shall be gasketed all round with neoprene bondedThe door and any removable covers shall be gasketed all round with neoprene bonded gaskets. A ventilating louver shall be provided with fine wire non-ferrous metal orgaskets. A ventilating louver shall be provided with fine wire non-ferrous metal or stainless steel screen and filter. A 230 V A.C heater with auto temperature control shall bestainless steel screen and filter. A 230 V A.C heater with auto temperature control shall be provided in the cabinet to prevent moisture condensation and also a 230 volt lamp forprovided in the cabinet to prevent moisture condensation and also a 230 volt lamp for internal illumination with door operated switch.internal illumination with door operated switch.

The local control cabinet shall be subjected to surface treatment and painting as per clauseThe local control cabinet shall be subjected to surface treatment and painting as per clause on surface treatment of this specification.on surface treatment of this specification.

10.510.5 Panel wiring and accessoriesPanel wiring and accessories

Panel wiring shall be suitably bunched and clamped for neat appearance. The conductorPanel wiring shall be suitably bunched and clamped for neat appearance. The conductor used for wiring purpose shall be PVC insulated 1100V grade semi-flexible copper cableused for wiring purpose shall be PVC insulated 1100V grade semi-flexible copper cable conforming to IEC: 227 or IS: 1554, heat resistant, flame, vermin and rodent proof. Theconforming to IEC: 227 or IS: 1554, heat resistant, flame, vermin and rodent proof. The wiring shall be securely supported and taken through PVC troughs. All panel wiring shallwiring shall be securely supported and taken through PVC troughs. All panel wiring shall be capable of withstanding a voltage of 2KV A.C 50 Hz for 1 minute. Each wire shall bebe capable of withstanding a voltage of 2KV A.C 50 Hz for 1 minute. Each wire shall be continuous from end to end without any joint in between.continuous from end to end without any joint in between.

The sizes of the control cable for wiring in the cabinet shall be not less than 2.5 mmThe sizes of the control cable for wiring in the cabinet shall be not less than 2.5 mm22. CT. CT secondary wiring shall be through two such wires in parallel.secondary wiring shall be through two such wires in parallel.

10.5.110.5.1 Fuse protection Fuse protection

The cabinet shall be equipped with links and HRC catridge fuses in 1.1KV grade fuseThe cabinet shall be equipped with links and HRC catridge fuses in 1.1KV grade fuse holders consisting of fuse carrier and base. The holders shall be made of high grade,holders consisting of fuse carrier and base. The holders shall be made of high grade, flame retardant and non hygroscopic phenolic moulded material of dark brown colourflame retardant and non hygroscopic phenolic moulded material of dark brown colour with hard glass surface. Each fuse shall be identified with engraved plastic lebels. with hard glass surface. Each fuse shall be identified with engraved plastic lebels.

10.5.210.5.2 Terminal blocksTerminal blocks

Terminal blocks rated for 10 amps. continuous current, 1.1KV grade covered by mouldedTerminal blocks rated for 10 amps. continuous current, 1.1KV grade covered by moulded insulating materials with adequate electrical clearance shall be provided for terminatinginsulating materials with adequate electrical clearance shall be provided for terminating the panel wiring and outgoing connections. The termination shall be made by crimpingthe panel wiring and outgoing connections. The termination shall be made by crimping lugs or bare wire with insulating sleeves at ends. The arrangement can be horizontal orlugs or bare wire with insulating sleeves at ends. The arrangement can be horizontal or vertical as per standard practice adopted by the manufacturer. All terminals must bevertical as per standard practice adopted by the manufacturer. All terminals must be numbered and wire termination provided with numbered ferrule for identification. Allnumbered and wire termination provided with numbered ferrule for identification. All numbering and marking include those in wiring diagram shall follow the guidelinesnumbering and marking include those in wiring diagram shall follow the guidelines provided in IS: 11353. Ten percent spare terminals shall be provided.provided in IS: 11353. Ten percent spare terminals shall be provided.

10.5.310.5.3 ColoursColours

The wiring used for AC supply for illumination lamp and heater shall be differentlyThe wiring used for AC supply for illumination lamp and heater shall be differently coloured from control wiring so that these can be distinguished from each other. Thecoloured from control wiring so that these can be distinguished from each other. The


colour of all earth wire shall be black.colour of all earth wire shall be black.10.610.6 Circuit diagramCircuit diagram

A durable copy of the circuit wiring diagram shall be affixed to the inner side of theA durable copy of the circuit wiring diagram shall be affixed to the inner side of the control cabinet door. Labels shall be provided inside in the cabinet to describe thecontrol cabinet door. Labels shall be provided inside in the cabinet to describe the functions of various items of equipment.functions of various items of equipment.

10.710.7 Cable EntryCable Entry

A removable gland plate shall be provided at the bottom of the cabinet for entry ofA removable gland plate shall be provided at the bottom of the cabinet for entry of Purchaser’s control and auxiliary power cables in the cabinet. Required number ofPurchaser’s control and auxiliary power cables in the cabinet. Required number of electroplated brass cable glands of appropriate sizes with shrouds shall be provided inelectroplated brass cable glands of appropriate sizes with shrouds shall be provided in consultation with the Purchaser in the gland plate for the control and power cables.consultation with the Purchaser in the gland plate for the control and power cables. Provision shall be made for earthing of the cable armours in the gland.Provision shall be made for earthing of the cable armours in the gland.

11.11. OPERATING MECHANISMOPERATING MECHANISM11.111.1 GeneralGeneral

The operating mechanism of the circuit breaker shall be motor wound spring chargedThe operating mechanism of the circuit breaker shall be motor wound spring charged type. It shall be electrically and mechanically trip free with anti pumping device (as pertype. It shall be electrically and mechanically trip free with anti pumping device (as per IEC: 694 definition). All working parts in the mechanism shall be of corrosion resistantIEC: 694 definition). All working parts in the mechanism shall be of corrosion resistant material. Self lubricating, wear resistant bearings shall be provided in the mechanism.material. Self lubricating, wear resistant bearings shall be provided in the mechanism.

The mechanism shall fully close the circuit breaker and sustain it in the closed positionThe mechanism shall fully close the circuit breaker and sustain it in the closed position against the forces of the rated making current and shall fully open the circuit breakeragainst the forces of the rated making current and shall fully open the circuit breaker without undue contact bounce at a speed commensurate with that shown by tests to bewithout undue contact bounce at a speed commensurate with that shown by tests to be necessary to achieve the rated breaking capacity in accordance with IEC: 56 or IS: 13118.necessary to achieve the rated breaking capacity in accordance with IEC: 56 or IS: 13118. The mechanism shall be capable of being locked in either the open or closed position. TheThe mechanism shall be capable of being locked in either the open or closed position. The mechanism shall be capable of fully closing and opening again after the auto-reclose timemechanism shall be capable of fully closing and opening again after the auto-reclose time interval specified as 0.3 second in this specification.interval specified as 0.3 second in this specification.

11.211.2 Spring mechanismSpring mechanism

The spring operating mechanism shall be complete with spring charging motor, openingThe spring operating mechanism shall be complete with spring charging motor, opening and closing springs with limit switches and all accessories necessary for automaticand closing springs with limit switches and all accessories necessary for automatic charging. In normal operation, recharging of the operating springs shall commencecharging. In normal operation, recharging of the operating springs shall commence immediately and automatically upon completion of the closing operation so that aimmediately and automatically upon completion of the closing operation so that a complete sequence of closing and opening operation should be possible.complete sequence of closing and opening operation should be possible.

It shall be possible to hand charge the operating springs with the circuit breaker in eitherIt shall be possible to hand charge the operating springs with the circuit breaker in either the open or closed position conveniently from the ground level. Closure whilst a springthe open or closed position conveniently from the ground level. Closure whilst a spring charging operation is in progress shall be prevented and release of the springs shall not becharging operation is in progress shall be prevented and release of the springs shall not be possible until they are fully charged. possible until they are fully charged.

The state of charge of the operating springs shall be indicated by a mechanical deviceThe state of charge of the operating springs shall be indicated by a mechanical device showing showing ‘SPRING CHARGED‘SPRING CHARGED’ when closing spring is fully charged and operation is’ when closing spring is fully charged and operation is permissible and permissible and ‘SPRING’ FREE’‘SPRING’ FREE’ when closing spring is not fully charged and the when closing spring is not fully charged and the operation is not possible. Provision shall be made for remote electrical indication ofoperation is not possible. Provision shall be made for remote electrical indication of ‘Spring Charged’ and ‘Spring Free’ conditions.‘Spring Charged’ and ‘Spring Free’ conditions.

The operating mechanism shall be such that the failure of any auxiliary spring shall notThe operating mechanism shall be such that the failure of any auxiliary spring shall not cause tripping or closing the circuit breaker but shall not prevent tripping against tripcause tripping or closing the circuit breaker but shall not prevent tripping against trip command.command.


Closing action of the circuit breaker shall charge the opening spring ready for tripping . From theClosing action of the circuit breaker shall charge the opening spring ready for tripping . From the close position with spring charged, one open-close-open operation shall be possible withoutclose position with spring charged, one open-close-open operation shall be possible without recharging the spring.recharging the spring.

11.311.3 MotorMotor

The motor for spring charging shall be single phase 230 Volt A.C motor. ContinuousThe motor for spring charging shall be single phase 230 Volt A.C motor. Continuous motor rating shall be at least ten percent above the maximum load demand of the drivenmotor rating shall be at least ten percent above the maximum load demand of the driven equipment. It shall remain within its rated capacity at all operating points that will arise inequipment. It shall remain within its rated capacity at all operating points that will arise in service. It shall be protected by H.R.C catridge fuses or MCB. The motor shall complyservice. It shall be protected by H.R.C catridge fuses or MCB. The motor shall comply with IEC: 34 or IS: 996. with IEC: 34 or IS: 996.

12.12. AUXILIARY POWER SUPPLYAUXILIARY POWER SUPPLY

The operating mechanism shall be suitable to operate with the following auxiliary powerThe operating mechanism shall be suitable to operate with the following auxiliary power supplies supplies

a)a) 230 V, 50 Hz, single phase A.C230 V, 50 Hz, single phase A.C -- for spring charging motorfor spring charging motor

b)b) DC supply 110 VoltsDC supply 110 Volts -- for close and open coils, indication & Alarm for close and open coils, indication & Alarm

The mechanism shall be designed to operate satisfactorily despite fluctuations ofThe mechanism shall be designed to operate satisfactorily despite fluctuations of auxiliary power supplies as under:auxiliary power supplies as under:

AC supply :AC supply : VoltageVoltage from 115% to 85% of normal voltagefrom 115% to 85% of normal voltage

Frequency Frequency from 105% to 95% of normal frequencyfrom 105% to 95% of normal frequency

Combined voltage andCombined voltage and frequency variation frequency variation

from 115% to 85% of normal from 115% to 85% of normal

DC Supply:DC Supply: VoltageVoltage from 120% to 70% of normal voltagefrom 120% to 70% of normal voltage

13.13. INTERLOCKSINTERLOCKS

The circuit breaker shall be capable of being mechanically and electrically interlockedThe circuit breaker shall be capable of being mechanically and electrically interlocked with the associated line isolator so that the isolator cannot be operated with the breaker inwith the associated line isolator so that the isolator cannot be operated with the breaker in the closed position.the closed position.

All doors or shutters which give access to live parts shall be interlocked in such a wayAll doors or shutters which give access to live parts shall be interlocked in such a way that these cannot be opened unless the circuit breaker is in the open position.that these cannot be opened unless the circuit breaker is in the open position.

Other interlocks shall be provided as deemed necessary for safety.Other interlocks shall be provided as deemed necessary for safety.

14.14. PROTECTION AND METERING PROTECTION AND METERING

Protective relays and metering will be provided in a control panel by separate agency inProtective relays and metering will be provided in a control panel by separate agency in Purchaser’s control room. The circuit breaker shall be particularly suitable for thePurchaser’s control room. The circuit breaker shall be particularly suitable for the


following protection schemes:following protection schemes:

Inter-tripping for simultaneous tripping other circuit breaker.Inter-tripping for simultaneous tripping other circuit breaker.

15.15. TERMINAL CONNECTORTERMINAL CONNECTOR

Suitable terminal connectors of bi-metallic type suitable for both horizontal and verticalSuitable terminal connectors of bi-metallic type suitable for both horizontal and vertical connection shall be provided on the terminal pads both on the incoming and the outgoingconnection shall be provided on the terminal pads both on the incoming and the outgoing side for connection to jumpers of ACSR or AAAC conductor. The size of the conductorside for connection to jumpers of ACSR or AAAC conductor. The size of the conductor may vary between 50 mmmay vary between 50 mm22 and 232 mm and 232 mm22 depending upon the location of the circuit depending upon the location of the circuit breaker. The terminal connection drawing and details are to be approved by the Purchaserbreaker. The terminal connection drawing and details are to be approved by the Purchaser before fabrication. The terminal connectors shall be bi-metallic type to avoid bimetallicbefore fabrication. The terminal connectors shall be bi-metallic type to avoid bimetallic corrosion.corrosion.

16.16. INSULATION AND CLEARANCE INSULATION AND CLEARANCE

a)a) The insulation to ground, the insulation between open contacts and insulation betweenThe insulation to ground, the insulation between open contacts and insulation between phases of the circuit breaker shall be capable of satisfactorily withstanding dielectricphases of the circuit breaker shall be capable of satisfactorily withstanding dielectric test voltages.test voltages.

b)b) The minimum clearance in open air shall be as follows :The minimum clearance in open air shall be as follows :

between poles - 460 mmbetween poles - 460 mm phase to earth - 400 mmphase to earth - 400 mm ground clearance for live part - 3700 mmground clearance for live part - 3700 mm

17.17. TEMPERATURE RISETEMPERATURE RISE

The temperature rise and the maximum temperature of any part of the circuit breakerThe temperature rise and the maximum temperature of any part of the circuit breaker under continuous load condition and exposed in the direct rays of the sun shall not exceedunder continuous load condition and exposed in the direct rays of the sun shall not exceed the permissible limits as provided in Table V of IEC publication 694 or table 4 of IS :the permissible limits as provided in Table V of IEC publication 694 or table 4 of IS : 12729. These limits shall not be exceeded when corrected for the difference between the12729. These limits shall not be exceeded when corrected for the difference between the ambient temperature at site and the ambient temperature specified in the standard. Theambient temperature at site and the ambient temperature specified in the standard. The correction proposed shall be stated in the tender.correction proposed shall be stated in the tender.

18.18. TESTSTESTS

18.118.1 Type and routine testsType and routine tests

The circuit breakers shall be subjected to routine and type tests in accordance with theThe circuit breakers shall be subjected to routine and type tests in accordance with the standards listed in this specification including the following IEC and IS standards with thestandards listed in this specification including the following IEC and IS standards with the latest amendments:latest amendments:

Circuit breaker IEC: 56 and IS: 13118 and relevant other standards.Circuit breaker IEC: 56 and IS: 13118 and relevant other standards. Porcelain insulator IEC: 233 and IS: 5621 and relevant other standards.Porcelain insulator IEC: 233 and IS: 5621 and relevant other standards.

The tests shall include but not limited to the following:The tests shall include but not limited to the following:

18.218.2 Short circuit testsShort circuit tests

The circuit breaker shall satisfactorily perform the out of phase and short circuit dutiesThe circuit breaker shall satisfactorily perform the out of phase and short circuit duties specified in IEC: 56, IEC: 17A (Sectt.) 438 and IEC:17A/CD/474 and IS: 13118 and IS:specified in IEC: 56, IEC: 17A (Sectt.) 438 and IEC:17A/CD/474 and IS: 13118 and IS:


13516.13516.

The circuit breaker shall be capable of performing at least twenty five (25) openThe circuit breaker shall be capable of performing at least twenty five (25) open operations at the rated short circuit current before maintenance or inspection is required.operations at the rated short circuit current before maintenance or inspection is required.

18.318.3 Capacitive current switchingCapacitive current switching Capacitive switching tests shall be performed in accordance with IEC:56 or IS:13118 andCapacitive switching tests shall be performed in accordance with IEC:56 or IS:13118 and IEC: 17A/CD/474 at 1.3U preferably by direct test method or alternatively using syntheticIEC: 17A/CD/474 at 1.3U preferably by direct test method or alternatively using synthetic method to IEC: 427 or IS:13516. The test circuits shall simulate the most onerous sitemethod to IEC: 427 or IS:13516. The test circuits shall simulate the most onerous site conditions.conditions.

18.418.4 Reactor Switching Reactor Switching

In addition to the capacitive current switching tests to IEC:56 or IS:13118 andIn addition to the capacitive current switching tests to IEC:56 or IS:13118 and IEC:17A/CD/474, the circuit breakers shall be tested for shunt reactor switching inIEC:17A/CD/474, the circuit breakers shall be tested for shunt reactor switching in accordance with IEC: 1233. Examination of the interrupter after the tests shall not showaccordance with IEC: 1233. Examination of the interrupter after the tests shall not show any evidence of surface tracking or erosion of contacts. any evidence of surface tracking or erosion of contacts.

18.518.5 Dielectric testsDielectric tests

At zero gauge loss of vacuum inside the interrupter chamber, the open contracts shallAt zero gauge loss of vacuum inside the interrupter chamber, the open contracts shall withstand continuously , the rated phase to ground voltage and it shall be possible towithstand continuously , the rated phase to ground voltage and it shall be possible to break normal current in these conditions. During the dielectric type tests, no flashoverbreak normal current in these conditions. During the dielectric type tests, no flashover external or internal shall be acceptable.external or internal shall be acceptable.

The circuit breakers shall be subjected to a power frequency AC voltage test for oneThe circuit breakers shall be subjected to a power frequency AC voltage test for one minute in dry and wet conditions and there shall be no external flash over to earth.minute in dry and wet conditions and there shall be no external flash over to earth.

18.618.6 Mechanical enduranceMechanical endurance

In addition to the requirements of IEC:56, an extended mechanical endurance test isIn addition to the requirements of IEC:56, an extended mechanical endurance test is required to show that the circuit breaker is capable of at least 10,000 operations at no loadrequired to show that the circuit breaker is capable of at least 10,000 operations at no load in accordance with IEC: 17A/474/CD. Between the specified test series in IEC:in accordance with IEC: 17A/474/CD. Between the specified test series in IEC: 17A/474/CD, some maintenance such as lubrication and mechanical adjustment is17A/474/CD, some maintenance such as lubrication and mechanical adjustment is allowed and shall be performed in accordance with manufacturer’s instructions. Changeallowed and shall be performed in accordance with manufacturer’s instructions. Change of contracts is not permitted.of contracts is not permitted.

18.718.7 Low current switching Low current switching

The circuit breakers shall produce very low over voltage (<2.0 pu) on all switchingThe circuit breakers shall produce very low over voltage (<2.0 pu) on all switching circuits inductive current including reactor switching to IEC – 1233 and capacitivecircuits inductive current including reactor switching to IEC – 1233 and capacitive current switching to IEC: 17A (Secretariat) 438 and IEC 17A/CD/474 the circuit breakercurrent switching to IEC: 17A (Secretariat) 438 and IEC 17A/CD/474 the circuit breaker shall be re-ignition or re-strike free for all duties.shall be re-ignition or re-strike free for all duties.

18.818.8 Duty requirement testsDuty requirement tests

Apart from auto-reclosing and the other duties mentioned above, the breakers shall beApart from auto-reclosing and the other duties mentioned above, the breakers shall be able to perform the following duties for which type tests are to be conducted as per IEC:able to perform the following duties for which type tests are to be conducted as per IEC: 56 or IS: 13118.56 or IS: 13118.

1. Breaking the steady and the transient magnetising current of the transformer.1. Breaking the steady and the transient magnetising current of the transformer.

2. Breaking 25% of rated fault current at twice the rated voltage as per IEC/IS.2. Breaking 25% of rated fault current at twice the rated voltage as per IEC/IS.


3. Cable charging breaking current.3. Cable charging breaking current.

4. Back-to-back capacitor bank breaking current 4. Back-to-back capacitor bank breaking current

5. Single capacitor bank breaking current.5. Single capacitor bank breaking current.

6. Capacitor bank in rush making current.6. Capacitor bank in rush making current.

Test for the resistance of the main circuit shall also be conducted.Test for the resistance of the main circuit shall also be conducted.

18.918.9 Temperature rise testTemperature rise test

Temperature rise test is to be conducted on the circuit breaker and the accessories inTemperature rise test is to be conducted on the circuit breaker and the accessories in

accordance with IEC: 56 or IS: 13118. The temperature rise shall be limited as per thisaccordance with IEC: 56 or IS: 13118. The temperature rise shall be limited as per this

specification.specification.

19.19. PERFORMANCE REQUIREMENTSPERFORMANCE REQUIREMENTS

The supplier shall declare the circuit breaker opening and closing times at 120 percent,The supplier shall declare the circuit breaker opening and closing times at 120 percent,

100 percent and 70 per cent of the rated voltage of the opening and closing devices when100 percent and 70 per cent of the rated voltage of the opening and closing devices when

measured at the terminals of the trip and closing coils. The minimum make break time atmeasured at the terminals of the trip and closing coils. The minimum make break time at

rated voltage and total break time of the CB shall be stated. The total break time must notrated voltage and total break time of the CB shall be stated. The total break time must not

exceed 60 m. sec.exceed 60 m. sec.

20.20. EARTHINGEARTHING

All metal parts not intended for carrying current or not alive shall be connected toAll metal parts not intended for carrying current or not alive shall be connected to

duplicate earthing system and suitable electroplated brass earthing terminals shall beduplicate earthing system and suitable electroplated brass earthing terminals shall be

provided on each circuit breaker in conformity with IEC : 56 or IS: 13118. Suitableprovided on each circuit breaker in conformity with IEC : 56 or IS: 13118. Suitable

identification mark for the earth terminals shall be provided adjacent to the terminal.identification mark for the earth terminals shall be provided adjacent to the terminal.

Earth continuity conductors shall be provided down to the ground level for earthEarth continuity conductors shall be provided down to the ground level for earth

connection to Purchaser’s earthing grid. It shall have sufficient cross sectional area toconnection to Purchaser’s earthing grid. It shall have sufficient cross sectional area to

afford a low resistance path for the full fault current envisaged. Such conductor shall alsoafford a low resistance path for the full fault current envisaged. Such conductor shall also

be provided for the CTs up to the ground level. be provided for the CTs up to the ground level.

The size of the earth continuity conductor shall be large enough to reduce the potentialThe size of the earth continuity conductor shall be large enough to reduce the potential rise of the metal frame of the breaker in the event of fault to minimum but in any case notrise of the metal frame of the breaker in the event of fault to minimum but in any case not more than 10V. The size of the conductor shall also be adequate to restrict themore than 10V. The size of the conductor shall also be adequate to restrict the


temperature rise without causing any damage to the earth connection in the case of fault.temperature rise without causing any damage to the earth connection in the case of fault. No riveted joints in the earth conducting path shall be permissible and only bolted jointsNo riveted joints in the earth conducting path shall be permissible and only bolted joints of adequate size shall be provided with nuts, bolts and plain and spring washers. Theof adequate size shall be provided with nuts, bolts and plain and spring washers. The surfaces to be jointed shall be perfectly flat without any unevenness to ensure that there issurfaces to be jointed shall be perfectly flat without any unevenness to ensure that there is no contact resistance.no contact resistance.

An earth busbar of copper strip shall be provided inside the local control cabinet to whichAn earth busbar of copper strip shall be provided inside the local control cabinet to which all earthing connections must be made. The earth busbar shall be terminated into twoall earthing connections must be made. The earth busbar shall be terminated into two electroplated brass earthing terminals of adequate size with nuts, bolts and washers forelectroplated brass earthing terminals of adequate size with nuts, bolts and washers for connecting to earth continuity conductor mentioned above.connecting to earth continuity conductor mentioned above.

ANNEXURE – V (A)ANNEXURE – V (A)

TECHINICAL DATA SCHEDULE FOR 33 KV OUTDOOR VACUUM CIRCUITTECHINICAL DATA SCHEDULE FOR 33 KV OUTDOOR VACUUM CIRCUIT BREAKERBREAKER


ITEMITEM NONO

DESCRIPTIONDESCRIPTION UNITSUNITS BIDDER’S BIDDER’S OFFEROFFER

11 GENERALGENERAL

- Name of manufacture- Name of manufacture - Manufacturer’s type designation- Manufacturer’s type designation - Governing standards- Governing standards - No. of poles of circuit breaker - No. of poles of circuit breaker no.no.- No. of breaks per phase- No. of breaks per phase no.no.- Total length of break per phase- Total length of break per phase mmmm- Type – Vacuum- Type – Vacuum Yes/NoYes/No

2.2. NOMINAL VOLTAGESNOMINAL VOLTAGES

- Rated voltage- Rated voltage KVKV- Maximum(continuous)service rated voltage- Maximum(continuous)service rated voltage KVKV

3.3. RATED NORMAL CURRNETSRATED NORMAL CURRNETS

- Under normal condition- Under normal condition AmpsAmps- Under site condition- Under site condition AmpsAmps

4.4. SHORT CIRCUIT PERFORMANCESSHORT CIRCUIT PERFORMANCES

- Rated short circuit breaking current:- Rated short circuit breaking current: Symmetrical, rmsSymmetrical, rms KAKAAsymmetrical including DC componentAsymmetrical including DC component KAKA

- Rated short circuit making current; peak- Rated short circuit making current; peak KAKA - Short time current withstand capability:- Short time current withstand capability:

Peak valuePeak value KAKARms valueRms value KAKADurationDuration SecSec

5.5. MAX. TEMP. RISE OVER AMBIENT OF 50MAX. TEMP. RISE OVER AMBIENT OF 5000CC

- At normal continuous current- At normal continuous current 00CC

- After performing the operating sequence- After performing the operating sequence 00CC


ITEMITEM NONO

DESCRIPTIONDESCRIPTION UNITSUNITS BIDDER’S BIDDER’S OFFEROFFER

66 Make & Break TimesMake & Break Times

Total break timesTotal break times

- At 10% rupturing capacity- At 10% rupturing capacity milli-secmilli-sec- At rated rupturing capacity- At rated rupturing capacity milli-secmilli-sec- Arcing time at rated breaking current- Arcing time at rated breaking current milli-secmilli-sec- Make time form giving close command- Make time form giving close command milli-secmilli-sec- Minimum reclose time at full rated interrupting- Minimum reclose time at full rated interrupting secsec Capacity from trip coil energisation Capacity from trip coil energisation - Minimum dead time for 3 phase reclosing- Minimum dead time for 3 phase reclosing secsec- Circuit breaker opening time:- Circuit breaker opening time:

at 125% of rated voltage of opening deviceat 125% of rated voltage of opening device milli-secmilli-sec

at 100% of rated voltage of opening deviceat 100% of rated voltage of opening device milli-secmilli-sec

at 70% of rated voltage of opening deviceat 70% of rated voltage of opening device milli-secmilli-sec- Circuit breaker closing time:- Circuit breaker closing time:

at 125% of rated voltage of closing deviceat 125% of rated voltage of closing device milli-secmilli-secat 100% of rated voltage of closing deviceat 100% of rated voltage of closing device milli-secmilli-secat 70% of rated voltage of closing deviceat 70% of rated voltage of closing device milli-secmilli-sec

77 RESTRIKING VOLTAGES FOR 100% RATED RESTRIKING VOLTAGES FOR 100% RATED CAPACITYCAPACITY

-- Amplitude factorAmplitude factor -- Phase factorPhase factor KVKV-- Natural frequencyNatural frequency HzHz-- Rate of rise of recovery voltage Rate of rise of recovery voltage kv/µskv/µs

88 RATED INSULATION LEVELRATED INSULATION LEVEL

- Dry and wet power frequency withstand test voltage - Dry and wet power frequency withstand test voltage (rms) for 1 minute(rms) for 1 minute

Between live terminals and grounded objects Between live terminals and grounded objects KVKV

Between terminals with breaker contacts open Between terminals with breaker contacts open KVKV- 1.2/50 µsec full wave impulse withstand voltage +ve - 1.2/50 µsec full wave impulse withstand voltage +ve

and - ve polarity (peak)and - ve polarity (peak)

Between live terminals and grounded objectBetween live terminals and grounded object KVKVBetween terminals with breaker contacts openBetween terminals with breaker contacts open KVKV

-- One mimute power frequency voltage of auxiliary One mimute power frequency voltage of auxiliary wiringwiring

KVKV


ITEMITEM NONO

DESCRIPTIONDESCRIPTION UNITSUNITS BIDDER’SBIDDER’S OFFEROFFER

99 OPERATING PERFORMANCEOPERATING PERFORMANCE

-- Rated transient recovery voltageRated transient recovery voltage KVKV - Rated cable charging breaking current- Rated cable charging breaking current amps.amps. -- Rated single capacitor bank breaking currentRated single capacitor bank breaking current ampsamps -- Rated back-to-back capacitor bank breaking currentRated back-to-back capacitor bank breaking current ampsamps -- Rated capacitor bank in-rush making currentRated capacitor bank in-rush making current ampsamps -- Rated small inductive breaking currentRated small inductive breaking current ampsamps -- First pole-to-clear factorFirst pole-to-clear factor -- Rated operating sequenceRated operating sequence -- Rated out-of-phase breaking current Rated out-of-phase breaking current KAKA -- Re-ignition and Re-strike freeRe-ignition and Re-strike free Yes/ NoYes/ No

1010 NUMBER OF OPERATION POSSIBLE WITHOUTNUMBER OF OPERATION POSSIBLE WITHOUT

MAINTENANCEMAINTENANCE -- at full rated interrupting currentat full rated interrupting current no.no. -- at 50% of rated interrupting currentat 50% of rated interrupting current nono -- at 100% of full load currentat 100% of full load current nono

-- at no load at no load nono 1111 MINIMUM CLRARANCE IN AIRMINIMUM CLRARANCE IN AIR

-- Between phasesBetween phases mmmm -- Live parts to earthLive parts to earth mmmm -- Live parts to ground levelLive parts to ground level mmmm

1212 WEIGHTS AND DIMENSIONSWEIGHTS AND DIMENSIONS

Total weight of one complete breaker, including mounting Total weight of one complete breaker, including mounting structure structure

kgkg

Mounting structure weightMounting structure weight kgkg Control cabinet weightControl cabinet weight kgkg Dimensions: HeightDimensions: Height mmmm Width Width mmmm Depth Depth mmmm Drawings must be providedDrawings must be provided

1313 HOLLOW INSULATOR HOUSINGHOLLOW INSULATOR HOUSING

Type and make of insulators.Type and make of insulators. Power frequency withstand test voltage for one minute:Power frequency withstand test voltage for one minute: -- DryDry KVKV -- WetWet KVKV Flash over valueFlash over value -- DryDry KVKV -- WetWet KVKV


ITEMITEM NONO


1.2/50 impulse voltage withstand capability1.2/50 impulse voltage withstand capability -- positive polaritypositive polarity KVKV -- negative polaritynegative polarity KVKV Creepage distance total Creepage distance total mmmm Creepage distance protectedCreepage distance protected mmmm Weight of assembled housingWeight of assembled housing kgkg Corona shield provided nor notCorona shield provided nor not Yes /noYes /no

1414 SUPPORT INSULATORSUPPORT INSULATOR

Type and make of insulatorsType and make of insulators Power frequency withstand test voltage for one minute:Power frequency withstand test voltage for one minute: -- DryDry KVKV -- WetWet KVKV Flash over valueFlash over value -- DryDry KVKV -- WetWet KVKV 1.2/50 impulse voltage withstand capability1.2/50 impulse voltage withstand capability -- positive polaritypositive polarity KVpKVp -- negative polaritynegative polarity KVpKVp Creepage distance, totalCreepage distance, total mmmm Creepage distance, protectedCreepage distance, protected mmmm Weight of assembled housingWeight of assembled housing kgkg Corona shield provided or notCorona shield provided or not yes/noyes/no 1515 CONTACTSCONTACTS

-- Type of main contactsType of main contacts -- Type of auxiliary contactsType of auxiliary contacts -- Material of auxiliary contactsMaterial of auxiliary contacts -- Type of plating, if anyType of plating, if any -- Thickness of platingThickness of plating micronmicron -- Contact pressureContact pressure gm/sq.mmgm/sq.mm No of auxiliary contacts provided:No of auxiliary contacts provided: Those closed when breaker is closed Those closed when breaker is closed nono Those open when breaker is closed Those open when breaker is closed nono Those adjustable Those adjustable nono

1616 OPERATING MECHANISMOPERATING MECHANISM

Opening typeOpening type Closing typeClosing type Force applied by charged spring for closingForce applied by charged spring for closing kgkg

Time taken by motor for charging the spring form fully Time taken by motor for charging the spring form fully discharged to fully charged positiondischarged to fully charged position

secsec

Full sequence of operationFull sequence of operation


ITEMITEM NONO


Whether limit switches are provided with springWhether limit switches are provided with spring yes/noyes/no Whether spring limit switches start & stop the motorWhether spring limit switches start & stop the motor yes/noyes/no Type and material of spring employedType and material of spring employed Whether trip freeWhether trip free yes/noyes/no Whether anti pumping device providedWhether anti pumping device provided yes/noyes/no

1717 AUXILIARY AND CONTROL POWER SUPPLYAUXILIARY AND CONTROL POWER SUPPLY

-- Normal auxiliary A.C supply voltageNormal auxiliary A.C supply voltage -- Voltage limits for proper operationVoltage limits for proper operation MaximumMaximum VoltsVolts MinimumMinimum VoltsVolts -- Frequency limits for proper operationFrequency limits for proper operation MaximumMaximum HzHz MinimumMinimum HzHz -- for circuit breakers : for circuit breakers : VoltsVolts -- Normal DC control circuit voltageNormal DC control circuit voltage VoltsVolts -- Voltage limits for proper operationVoltage limits for proper operation MaximumMaximum VoltsVolts MaximumMaximum VoltsVolts -- Power required for trip coilPower required for trip coil Watts Watts -- Power required for closing coilPower required for closing coil Watts Watts

1818 LOCAL CONTROL PANELLOCAL CONTROL PANEL -- MaterialMaterial -- Degree of protectionDegree of protection -- Vermin proof provisionsVermin proof provisions Yes/noYes/no -- Weather proof provisionWeather proof provision Yes/noYes/no -- Dust proof provisionDust proof provision Yes/noYes/no -- Ventilation provisionVentilation provision Yes/noYes/no -- Thickness of sheet materials usedThickness of sheet materials used mmmm -- Overall dimensionsOverall dimensions mmmm -- Total weightTotal weight kgkg -- Mounting arrangementMounting arrangement

1919 TERMINAL CONNECTORTERMINAL CONNECTOR -- MaterialMaterial -- Bi-metallic or notBi-metallic or not yes/noyes/no -- WeightWeight kgkg -- DimensionsDimensions mmmm -- Size and type of conductor it can accommodateSize and type of conductor it can accommodate sq mmsq mm

-- Terminal pads silver plated or notTerminal pads silver plated or not yes/noyes/no-- Thickness of silver platingThickness of silver plating micronsmicrons


ITEMITEM NONO


2020 CORROSION PREVENTION SYSTEM FORCORROSION PREVENTION SYSTEM FOR CIRCUIT BREAKER AND CONTROL CABINETCIRCUIT BREAKER AND CONTROL CABINET

-- Surface preparationSurface preparation -- Rust inhibitionRust inhibition -- Zinc thickness/paint thicknessZinc thickness/paint thickness micronsmicrons -- Treatment of fastenersTreatment of fasteners

2121 CORROSION PREVENTION SYSTEM FORCORROSION PREVENTION SYSTEM FOR SUPPORT STRUCTURESUPPORT STRUCTURE

Surface preparation Surface preparation Rust inhibition Rust inhibition Zinc thickness Zinc thickness micronsmicrons Treatment of fasteners. Treatment of fasteners.

2222 VACUUM CIRCUIT BREAKER SEALINGVACUUM CIRCUIT BREAKER SEALING Degree of protection of circuit breaker pole enclosure. (IECDegree of protection of circuit breaker pole enclosure. (IEC

529, IS 13947)529, IS 13947)

Method of sealing the circuit breaker pole enclosure. Method of sealing the circuit breaker pole enclosure.

2323 33 KV CURRENT TRANSFORMER33 KV CURRENT TRANSFORMER for transformer protectionfor transformer protection -- Make and type of transformerMake and type of transformer -- Ratio 200-100-50/ 1- 1 – 1 ARatio 200-100-50/ 1- 1 – 1 A Core1. Core1. Accuracy class Accuracy class 0.50.5 Saturation factor Saturation factor Accuracy limit factor Accuracy limit factor Knee point voltage Knee point voltage VoltsVolts Magnetizing current at V Magnetizing current at Vkk/2/2 Milli amps.Milli amps. Secondary resistance R Secondary resistance Rctct ohmsohms Core 2. VA burdenCore 2. VA burden VAVA Accuracy class Accuracy class Saturation factor Saturation factor Accuracy limit factor Accuracy limit factor Core 3. VA burden Core 3. VA burden VAVA Accuracy class Accuracy class Saturation factor Saturation factor Accuracy limit factor Accuracy limit factor Instrument security factor Instrument security factor Short time current rating : Current Short time current rating : Current KAKA time time Sec.Sec.

Impulse voltage withstand levelImpulse voltage withstand level KVKV


ITEMITEM NONO


Power frequency voltage withstand levelPower frequency voltage withstand level Primary windingPrimary winding KVKV Secondary windingSecondary winding KVKV Specification of oilSpecification of oil Quantity of oilQuantity of oil LitersLiters Creepage distanceCreepage distance mmmm Protected creepage distanceProtected creepage distance mmmm Weight of CT complete with oilWeight of CT complete with oil kgkg

2424 Corrosion Prevention System for CTsCorrosion Prevention System for CTs Surface preparation Surface preparation Rust in inhibition Rust in inhibition Paint thicknessPaint thickness micronmicron Treatment of fastenersTreatment of fasteners Oil resistance varnishOil resistance varnish

2525 33 KV VOLTAGE TRANSFORMER 33 KV VOLTAGE TRANSFORMER 11 GENERAL.GENERAL. -- Make Make -- Type of transformerType of transformer -- Rated normal voltageRated normal voltage KVKV -- Rated maximum voltageRated maximum voltage KVKV -- Rated primary voltageRated primary voltage KVKV -- Rated secondary voltageRated secondary voltage VoltsVolts -- V A burdenV A burden VAVA -- Accuracy classAccuracy class -- Ratio errorRatio error -- Phase displacement positive or negativePhase displacement positive or negative -- Saturation factorSaturation factor -- Instrument security factorInstrument security factor -- Short time current ratingShort time current rating Rms valueRms value KAKA PeriodPeriod SecSec Peak valuePeak value KAKA -- Impulse voltage withstand levelImpulse voltage withstand level KVKV -- One minute power frequency voltage One minute power frequency voltage KVKV -- withstand level of primary winding withstand level of primary winding KVKV -- Specification of oilSpecification of oil -- Weight of oilWeight of oil KgKg -- Weight of core and windingWeight of core and winding KgKg -- Total weightTotal weight KgKg

-- Overall dimensionsOverall dimensions mmmm-- Rated voltage factorRated voltage factor


ITEMITEM NONO


ContinuousContinuous For 30 secondsFor 30 seconds -- Temperature rise above the ambient of 50Temperature rise above the ambient of 5000CC 00CC

-- Correction factorCorrection factor -- Partial discharge levelPartial discharge level pCpC 22 TANKTANK -- Composition of metalComposition of metal

-- ThicknessThickness mmmm 33 CORECORE -- Material compositionMaterial composition -- Flux density at normal voltage and frequencyFlux density at normal voltage and frequency TelsaTelsa -- Lamination thicknessLamination thickness mmmm 44 WINDINGSWINDINGS -- Purity of copper usedPurity of copper used PercentPercent -- Type of insulationType of insulation -- Power frequency withstand levelPower frequency withstand level Secondary winding to earthSecondary winding to earth KVKV Between sectionsBetween sections KVKV 55 SECONDARY TERMINAL BOXSECONDARY TERMINAL BOX -- Degree of protectionDegree of protection -- Vermin proof provisionVermin proof provision Yes/noYes/no -- Weather proof provisionWeather proof provision Yes/noYes/no -- Dust proof provisionDust proof provision Yes/noYes/no -- Thickness of metal usedThickness of metal used mmmm -- Overall dimensionsOverall dimensions mmmm -- Mounting arrangementMounting arrangement 66 H V TERMINALH V TERMINAL -- MaterialMaterial -- Bi-metallic or notBi-metallic or not Yes/noYes/no -- Dimensions,Dimensions, mmmm -- Size and type of conductor it can accommodateSize and type of conductor it can accommodate Sq. mmSq. mm

77 CORROSION PREVENTION SUSTEMCORROSION PREVENTION SUSTEM (To be furnished as per clause on Surface Treatment)(To be furnished as per clause on Surface Treatment) -- Surface preparationSurface preparation -- Rust inhibitionRust inhibition -- Treatment of fastenersTreatment of fasteners -- Oil resisting varnishOil resisting varnish

2626 INSTRUMENTS & METERS (for Relay Panel)INSTRUMENTS & METERS (for Relay Panel)1.1. Type & make of instruments & meter Type & make of instruments & meter2.2. size size


ITEMITEM NONO


3.3. Whether magnetically shielded or not Whether magnetically shielded or not 4.4. Limits or error in the effective range Limits or error in the effective range 5.5. Scale length Scale length 6.6. Whether Tropicalised Whether Tropicalised 7.7. short time overload rating short time overload rating 8.8. V A Burden: V A Burden: Current coil Current coil Potential coil Potential coil 9.9. Power consumption of current & potential coil Power consumption of current & potential coil

RELAYSRELAYS 1.1. Type & make of relay Type & make of relay 2.2. Current coil ratingCurrent coil rating 3.3. Tap range Tap range 4.4. VA Burden Highest tap & lowest tap VA Burden Highest tap & lowest tap 5.5. Power consumption at highest tap & lowest tapPower consumption at highest tap & lowest tap

6.6. Time of operation at maximum time dial seting at Time of operation at maximum time dial seting at i) i) 5 times tap setting current5 times tap setting current

ii) ii) 10 times tap setting current10 times tap setting current

7.7. Type of characteristic Type of characteristic 8.8. Whether draw out type or notWhether draw out type or not 9.9. Trip contact ratings Amps.Trip contact ratings Amps. 10.10. Whether seal In contacts provided or not Whether seal In contacts provided or not


SECTION –BSECTION –B

TECHINICAL SPECIFICATIONSTECHINICAL SPECIFICATIONS

FOR FOR

11KV INDOOR VACUUM CIRCUIT 11KV INDOOR VACUUM CIRCUIT BREAKERSBREAKERS

SECTION – IVBSECTION – IVB


TECHNICAL SPECIFICATION FOR 11KV INDOOR VACUUM CIRCUIT BREAKERSTECHNICAL SPECIFICATION FOR 11KV INDOOR VACUUM CIRCUIT BREAKERS

1.1. SCOPESCOPE

1.11.1 This specification covers design, engineering, manufacture, testing, inspection beforeThis specification covers design, engineering, manufacture, testing, inspection before

dispatch, packing, forwarding, transportation, insurance during transit, delivery to site/dispatch, packing, forwarding, transportation, insurance during transit, delivery to site/

stores of 11KV indoor Vacuum circuit breakers for use in the 33/11 KV primary substationsstores of 11KV indoor Vacuum circuit breakers for use in the 33/11 KV primary substations

under the distribution networks of WESCO. under the distribution networks of WESCO.

1.21.2 All vacuum circuit breakers must be manufactured by ISO 9000 certified Organization andAll vacuum circuit breakers must be manufactured by ISO 9000 certified Organization and

shall have been type tested at CPRI or any Govt. approved laboratory within Ten years asshall have been type tested at CPRI or any Govt. approved laboratory within Ten years as

on the date of bid opening and in satisfactory operation for a period not less than threeon the date of bid opening and in satisfactory operation for a period not less than three

years. The Bidder shall demonstrate compliance with this requirement by supplying withyears. The Bidder shall demonstrate compliance with this requirement by supplying with

the bid, copies of the type test certificates together with performance certificates fromthe bid, copies of the type test certificates together with performance certificates from

purchasers/ users.purchasers/ users.

1.31.3 The scope also includes the circuit breaker and current and potential transformers,The scope also includes the circuit breaker and current and potential transformers,

supporting structures, operating mechanism, local/ remote control cabinet, relay controlsupporting structures, operating mechanism, local/ remote control cabinet, relay control

panel, foundation bolts, all the accessories and auxiliary equipment, mandatory spares andpanel, foundation bolts, all the accessories and auxiliary equipment, mandatory spares and

special tools for satisfactory installation and operation.special tools for satisfactory installation and operation.

1.41.4 The circuit breakers shall conform in all respects to the highest standards of engineering,The circuit breakers shall conform in all respects to the highest standards of engineering,

design, workmanship, this specification and the latest revisions of relevant standards at thedesign, workmanship, this specification and the latest revisions of relevant standards at the

time of offer and the Purchaser shall have the power to reject any work or materials, which,time of offer and the Purchaser shall have the power to reject any work or materials, which,

in his judgment, is not in full accordance therewith.in his judgment, is not in full accordance therewith.

2.2. STANDARDSSTANDARDS

Except where modified by this specification, the circuit breakers and the accessories shall beExcept where modified by this specification, the circuit breakers and the accessories shall be

designed, manufactured and tested in accordance with latest editions of the standards as specified indesigned, manufactured and tested in accordance with latest editions of the standards as specified in

Clause No.2, Technical Specifications for 33KV outdoor vacuum Circuit Breakers, Section – IV(A).Clause No.2, Technical Specifications for 33KV outdoor vacuum Circuit Breakers, Section – IV(A).

3.3. REQUIREMENTSREQUIREMENTS


The circuit breakers to be supplied against this specification shall be required to control theThe circuit breakers to be supplied against this specification shall be required to control the

primary/ secondary side of 33/11 KV power transformers in the primary sub-stations or theprimary/ secondary side of 33/11 KV power transformers in the primary sub-stations or the

incoming 33 KV feeders or the outgoing feeders in these sub-stations. The circuit breakersincoming 33 KV feeders or the outgoing feeders in these sub-stations. The circuit breakers

shall be suitable for 3 phase, 50 Hz solidly grounded neutral system and shall have normalshall be suitable for 3 phase, 50 Hz solidly grounded neutral system and shall have normal

current carrying capacity and symmetrical short circuit current breaking capability ascurrent carrying capacity and symmetrical short circuit current breaking capability as

mentioned hereunder.mentioned hereunder.

The required 11KV Vacuum Circuit Breakers suitable for indoor installations are to beThe required 11KV Vacuum Circuit Breakers suitable for indoor installations are to be

quoted by Manufacturers only with valid ISO 9000 certification. For indoor circuit breakersquoted by Manufacturers only with valid ISO 9000 certification. For indoor circuit breakers

only floor and horizontal draw out and horizontal isolation breakers are acceptedonly floor and horizontal draw out and horizontal isolation breakers are accepted..

3.13.1 BASIC TECHNICAL REQUIREMENTS:BASIC TECHNICAL REQUIREMENTS:

The vacuum circuit breakers are required to meet the following basic technicalThe vacuum circuit breakers are required to meet the following basic technical

requirements: (Reference standards: IEC: 56, IS: 13118 and associated standards listed inrequirements: (Reference standards: IEC: 56, IS: 13118 and associated standards listed in

this specification)this specification)

Basic Technical RequirementsBasic Technical Requirements

Sl.Sl. No.No.

Particulars Particulars RequirementsRequirements

11 Service type Service type IndoorIndoor22 No. of PolesNo. of Poles 33

33 Nominal system voltageNominal system voltage 11 KV11 KV

44 Highest system voltageHighest system voltage 12 KV12 KV

55 Rated normal current at 50Rated normal current at 5000 C C

i)i) For Bus-bar of Circuit BreakerFor Bus-bar of Circuit Breaker 800 A800 Aii)ii) For InterrupterFor Interrupter 1250 A1250 Aiii)iii) For Outgoing FeedersFor Outgoing Feeders 630 A630 A

66 Rated short circuit breaking current (rms)Rated short circuit breaking current (rms) 25 KA25 KA

77 Rated short circuit making current (Peak)Rated short circuit making current (Peak) 63 KA63 KA

88 Rated short time current withstand capability for 3 sec.Rated short time current withstand capability for 3 sec. 20 KA (Panel)/ 25 KA (Interrupter)20 KA (Panel)/ 25 KA (Interrupter)

99 Rated insulation level :Rated insulation level :i)i) One minute power frequency withstand voltage to earthOne minute power frequency withstand voltage to earth

(wet and dry ) rms(wet and dry ) rms28 KV28 KV

ii)ii) Impulse withstand voltage to earth with 1.2/50µsec.Impulse withstand voltage to earth with 1.2/50µsec. wave of +ve and –ve polarity (Peak )wave of +ve and –ve polarity (Peak )

75 KV75 KV

1010 First-pole-to clear factorFirst-pole-to clear factor 1.51.51111 Rated operating sequence (for auto reclosing)Rated operating sequence (for auto reclosing) O-0.3 sec-CO-3 min-COO-0.3 sec-CO-3 min-CO1212 Maximum break timeMaximum break time 3 cycles3 cycles


1313 Rated out of phase breaking currentRated out of phase breaking current 25% of the symmetrical short circuit25% of the symmetrical short circuit breaking current.breaking current.

1414 Maximum pole scatterMaximum pole scatter 10 mili seconds10 mili seconds

1515 Rated Auxiliary supply for spring charge motor, lamp &Rated Auxiliary supply for spring charge motor, lamp & heater circuit.heater circuit.

230 V A.C230 V A.C

1616 Rated supply voltage for trip / close coilRated supply voltage for trip / close coil 110 V D.C110 V D.C1717 Minimum creepage distance (mm)Minimum creepage distance (mm) 3503501818 Minimum protected creepage distance (mm)Minimum protected creepage distance (mm) 280280

4.4. SERVICE CONDITIONS:SERVICE CONDITIONS: The breakers are to be suitable for operation under the service conditions as specified in ClauseThe breakers are to be suitable for operation under the service conditions as specified in Clause No.4, Technical Specifications for 33KV outdoor vacuum Circuit Breakers, Section -(A).No.4, Technical Specifications for 33KV outdoor vacuum Circuit Breakers, Section -(A).

5.5. 11 KV INDOOR VACUUM CIRCUIT BREAKER11 KV INDOOR VACUUM CIRCUIT BREAKER


5.1.15.1.1

5.1.25.1.2

5.1.35.1.3

The circuit breakers along with CT, PT, Control & relay Panels shall be suitable for indoorThe circuit breakers along with CT, PT, Control & relay Panels shall be suitable for indoor installations with vacuum as interrupting media incorporating separate interrupters of 1250 Ainstallations with vacuum as interrupting media incorporating separate interrupters of 1250 A rating for each phase mounted on single frame. There shall be a common drive mechanismrating for each phase mounted on single frame. There shall be a common drive mechanism actuating the interrupters, which must work in synchronism. These breakers shall be providedactuating the interrupters, which must work in synchronism. These breakers shall be provided with suitable local control while provision shall be made for remote control. with suitable local control while provision shall be made for remote control.

The entire circuit breaker with its operating mechanism shall be mounted on a horizontal drawThe entire circuit breaker with its operating mechanism shall be mounted on a horizontal draw out type chassis/ trolley inserted into a floor standing sheet steel enclosure suitable forout type chassis/ trolley inserted into a floor standing sheet steel enclosure suitable for withstanding electromagnetic/ electro-dynamic forces of both symmetrical and asymmetricalwithstanding electromagnetic/ electro-dynamic forces of both symmetrical and asymmetrical faults. It shall have plug-in off load type isolating main and auxiliary contacts with all necessaryfaults. It shall have plug-in off load type isolating main and auxiliary contacts with all necessary safety features, door limit switch etc.safety features, door limit switch etc.

The vacuum circuit breaker panels shall be enclosed in sheet steel independent floor mountingThe vacuum circuit breaker panels shall be enclosed in sheet steel independent floor mounting cubicle made of 2.0 mm thick CRCA Sheet for outer walls and 1.5 mm thick for partition / insidecubicle made of 2.0 mm thick CRCA Sheet for outer walls and 1.5 mm thick for partition / inside walls suitable for coupling with identical units on either sides to form switchboard. Thewalls suitable for coupling with identical units on either sides to form switchboard. The circuit breaker panel shall be such that when the withdrawable part is being removed the metalcircuit breaker panel shall be such that when the withdrawable part is being removed the metal shutters can be opened with a lever, for an example to inspect the mating contacts or locked withshutters can be opened with a lever, for an example to inspect the mating contacts or locked with a padlock. The upper portion (access to the Busbar) and the lower portion (access to thea padlock. The upper portion (access to the Busbar) and the lower portion (access to the termination compartment) can be unscrewed with the metal shutters closed. This makes ittermination compartment) can be unscrewed with the metal shutters closed. This makes it possible to work in the Busbar compartment with the termination compartment fullypossible to work in the Busbar compartment with the termination compartment fully partitioned off, and vice versa. The breaker shall be provided with three distinct positionspartitioned off, and vice versa. The breaker shall be provided with three distinct positions namely Service, Test and Isolate.namely Service, Test and Isolate.

5.1.45.1.4 The circuit breakers shall be fitted with spring mechanism. The inherent design of these The circuit breakers shall be fitted with spring mechanism. The inherent design of these circuit breakers shall be such that they shall satisfactorily perform all test duties and circuit breakers shall be such that they shall satisfactorily perform all test duties and interrupt out-of-phase current and produce very low over voltage (< 2.0 p.u. ) on all interrupt out-of-phase current and produce very low over voltage (< 2.0 p.u. ) on all switching circuits, capacitive and inductive to IEC: 56, IS: 13118 and other associated switching circuits, capacitive and inductive to IEC: 56, IS: 13118 and other associated standards mentioned in the clause of this specification.standards mentioned in the clause of this specification.

5.1.55.1.5 The terminal pads shall have silver-plating of at least 50 micron thickness. The design of The terminal pads shall have silver-plating of at least 50 micron thickness. The design of the circuit breaker shall be such that inspection and replacement of contacts, coils, the circuit breaker shall be such that inspection and replacement of contacts, coils,


vacuum bottles and any worn or damaged components can be carried out quickly and vacuum bottles and any worn or damaged components can be carried out quickly and with ease. The contact gaps shall be adjustable to allow for wear.with ease. The contact gaps shall be adjustable to allow for wear.

5.1.65.1.6 The mechanism and the connected interrupters shall satisfy the mechanical endurance The mechanism and the connected interrupters shall satisfy the mechanical endurance requirements of IEC: 56, IS: 13118 and all additional requirements specified herein.requirements of IEC: 56, IS: 13118 and all additional requirements specified herein.

6.06.0 Interrupting mediaInterrupting media

6.16.1 Vacuum:Vacuum:

6.1.16.1.1 In vacuum circuit breakers, facilities shall be provided for monitoring the contact erosionIn vacuum circuit breakers, facilities shall be provided for monitoring the contact erosion and any change in contact gap. The vacuum bottles shall be easily replaceable on site andand any change in contact gap. The vacuum bottles shall be easily replaceable on site and the mechanism shall be conveniently adjustable to permit resetting the contact gap. The the mechanism shall be conveniently adjustable to permit resetting the contact gap. The current rating of the vacuum interrupters shall be 1250 Amp.current rating of the vacuum interrupters shall be 1250 Amp.

6.1.26.1.2 The vacuum circuit breaker poles shall be sealed to prevent contamination of the spaces The vacuum circuit breaker poles shall be sealed to prevent contamination of the spaces surrounding the interrupters. The Bidder shall demonstrate how this is achieved by surrounding the interrupters. The Bidder shall demonstrate how this is achieved by supplying technical details with the bid. supplying technical details with the bid.

7.07.0 Auxiliary contacts Auxiliary contacts

7.17.1 12 auxiliary contacts (6 N.O + 6 N.C) of 110Volt DC grade and 10 amps. DC rating shall12 auxiliary contacts (6 N.O + 6 N.C) of 110Volt DC grade and 10 amps. DC rating shall be provided in each circuit breakerbe provided in each circuit breaker

8.08.0 Indication Indication

8.18.1 A mechanically operated circuit breaker position indicator of non corroding material A mechanically operated circuit breaker position indicator of non corroding material shall be provided in a location visible from the operating side of the breaker without the shall be provided in a location visible from the operating side of the breaker without the necessity to open the mechanism door. The word ‘OFF’ in white letters on green necessity to open the mechanism door. The word ‘OFF’ in white letters on green background shall be used to indicate that the breaker is in the open position and the word background shall be used to indicate that the breaker is in the open position and the word ‘ON’ in white letters on a red background to indicate that the breaker is in the closed ‘ON’ in white letters on a red background to indicate that the breaker is in the closed position. The drive for the device shall be positive in both directions and provision shall position. The drive for the device shall be positive in both directions and provision shall be made for local and remote electrical indication.be made for local and remote electrical indication.

8.28.2 Indication of spring charging condition shall be provided as mentioned in this specification.Indication of spring charging condition shall be provided as mentioned in this specification. Mechanical counters to record the number of closing operations shall be provided for each circuitMechanical counters to record the number of closing operations shall be provided for each circuit breaker mechanism.breaker mechanism.

9.09.0 Operation and controls Operation and controls

9.19.1 The breaker shall normally be operated by remote electrical control with electrical The breaker shall normally be operated by remote electrical control with electrical tripping by shunt trip coil. Provision shall be made for local electrical operation and tripping by shunt trip coil. Provision shall be made for local electrical operation and mechanical operation.mechanical operation.

9.29.2 The following facilities shall be provided in the circuit breaker local control cabinet:The following facilities shall be provided in the circuit breaker local control cabinet:

LOCAL / REMOTE selector switch of stay put type. The selection of ‘local’ LOCAL / REMOTE selector switch of stay put type. The selection of ‘local’ operation shall inhibit the operation of the breaker from any remote sourceoperation shall inhibit the operation of the breaker from any remote source

ON/ NEUTRAL/ OFF control switch or ON and OFF push buttons. The push buttonsON/ NEUTRAL/ OFF control switch or ON and OFF push buttons. The push buttons shall be momentary contact type with rear terminal connections. The close push button shallshall be momentary contact type with rear terminal connections. The close push button shall be of green colour and the open push button red colour.be of green colour and the open push button red colour.

MECHANICAL EMERGENCY TRIP DEVICE: suitable for manual operation in theMECHANICAL EMERGENCY TRIP DEVICE: suitable for manual operation in the event of failure of electrical supplies. The device shall be accessible without opening anyevent of failure of electrical supplies. The device shall be accessible without opening any


access doors and distinctly labeled. It shall be shrouded and protected against inadvertentaccess doors and distinctly labeled. It shall be shrouded and protected against inadvertent operation.operation.

Means shall be provided for manual operation of these circuit breakers during failure ofMeans shall be provided for manual operation of these circuit breakers during failure of auxiliary power in addition to electrical operation.auxiliary power in addition to electrical operation.

9.39.3 Means shall be provided to prevent the mechanism from responding to a close signal Means shall be provided to prevent the mechanism from responding to a close signal when the trip coil is energized or to reclose from a sustained close signal either after when the trip coil is energized or to reclose from a sustained close signal either after opening due to a trip signal or failure to hold in the closed position.opening due to a trip signal or failure to hold in the closed position.

9.49.4 The circuit breaker shall be able to perform 10,000 operating cycles at no load in The circuit breaker shall be able to perform 10,000 operating cycles at no load in accordance with IEC: 17A/474/CD for circuit breakers for auto reclosing duties.accordance with IEC: 17A/474/CD for circuit breakers for auto reclosing duties.

10.010.0 CURRENT TRANSFORMERSCURRENT TRANSFORMERS

10.110.1 Current transformers, three per circuit breaker, shall be of indoor, single phase, resin castCurrent transformers, three per circuit breaker, shall be of indoor, single phase, resin cast and shall comply with IEC: 185 and IS: 2705, suitable for operation in hot and humid and shall comply with IEC: 185 and IS: 2705, suitable for operation in hot and humid atmospheric conditions described in service condition. They shall be mounted inside the atmospheric conditions described in service condition. They shall be mounted inside the panel. panel.

10.210.2 CoreCore

10.2.110.2.1 High grade non – ageing cold rolled grain oriented silicon steel of low hysteresis loss andHigh grade non – ageing cold rolled grain oriented silicon steel of low hysteresis loss and permeability shall be used for the core so as to ensure specified accuracy at both normal permeability shall be used for the core so as to ensure specified accuracy at both normal and over currents. The flux density shall be limited to ensure that there is no saturation and over currents. The flux density shall be limited to ensure that there is no saturation during normal service.during normal service.

10.2.210.2.2 The instrument security factor of the core shall be low enough so as not to cause damage The instrument security factor of the core shall be low enough so as not to cause damage to the instruments in the event of maximum short circuit current.to the instruments in the event of maximum short circuit current.

10.310.3 Windings Windings

10.3.110.3.1 The primary & secondary windings shall be made of electrolytic copper with suitable The primary & secondary windings shall be made of electrolytic copper with suitable insulation. The conductor shall be of adequate cross-section so as to limit the temperatureinsulation. The conductor shall be of adequate cross-section so as to limit the temperature rise even during short circuit conditions. The insulation of windings and connections rise even during short circuit conditions. The insulation of windings and connections shall be free from composition liable to soften, ooze, shrink or collapse during service.shall be free from composition liable to soften, ooze, shrink or collapse during service.

10.3.210.3.2 Polarity shall be indelibly marked on each current transformer and at the lead and Polarity shall be indelibly marked on each current transformer and at the lead and termination at associated terminal blocks. CTs with multi ratio winding shall be clearly termination at associated terminal blocks. CTs with multi ratio winding shall be clearly tabulated to show the connections required for different ratios. Similar numbers shall be tabulated to show the connections required for different ratios. Similar numbers shall be marked on terminal block arrangement and wiring diagram. Apart from the above marked on terminal block arrangement and wiring diagram. Apart from the above marking and those to be provided as per IEC 185 or IS 2705, other markings shall be marking and those to be provided as per IEC 185 or IS 2705, other markings shall be provided in consultation with owner.provided in consultation with owner.

10.3.310.3.3 The continuous current rating of the primary winding shall be one hundred and fifty The continuous current rating of the primary winding shall be one hundred and fifty percent of the normal rated current.percent of the normal rated current.

10.3.410.3.4 Secondary windings of current transformers shall be used for metering, instrumentation Secondary windings of current transformers shall be used for metering, instrumentation and protection and shall be rated for continuous current of one hundred and fifty percent and protection and shall be rated for continuous current of one hundred and fifty percent of normal rated current of primary winding.of normal rated current of primary winding.

10.410.4 Fittings and accessories Fittings and accessories


10.4.110.4.1 Fittings and accessories listed below shall be supplied with each current transformer:Fittings and accessories listed below shall be supplied with each current transformer:

Bimetallic connectors suitable for connecting 185 – 300 mmBimetallic connectors suitable for connecting 185 – 300 mm22 XLPE insulated XLPE insulated Aluminium Cables;Aluminium Cables;

two earthing terminals and strips with necessary nuts, bolts and washers;two earthing terminals and strips with necessary nuts, bolts and washers; name and rating plate;name and rating plate; LV terminals with connection diagram ;LV terminals with connection diagram ; mounting nuts, bolts and washers;mounting nuts, bolts and washers;

10.4.210.4.2 Any other fittings deemed essential by the Supplier shall also be supplied with each Any other fittings deemed essential by the Supplier shall also be supplied with each current transformer.current transformer.

10.510.5 Basic technical requirementBasic technical requirement

Ratings: The CTs shall conform to the following ratings and other particulars of the Ratings: The CTs shall conform to the following ratings and other particulars of the circuit breakers:circuit breakers:

Technical Requirement Technical Requirement

Sl. No.Sl. No. ParticularsParticulars Requirements Requirements 1.1. Function Function To control the secondary side of 33/11 KV power transformersTo control the secondary side of 33/11 KV power transformers

of ratings between 1.6 MVA and 10 MVA in primaryof ratings between 1.6 MVA and 10 MVA in primary substations and feeders.substations and feeders.

2.2. Requirement Requirement Core - 1 : Instrumentation and MeteringCore - 1 : Instrumentation and MeteringCore - 2 : Combined Over current and earth fault protection Core - 2 : Combined Over current and earth fault protection Core - 3: Differential Protection (For Transformer panelsCore - 3: Differential Protection (For Transformer panels only)only)

3.3. Transformation RatioTransformation Ratio Category –A (For TFR)Category –A (For TFR)800-400-200/1-1-0.577 A800-400-200/1-1-0.577 A

Category –B (For FDR)Category –B (For FDR)400-200-100/1-1-1-1A400-200-100/1-1-1-1A

4.4. Rated Burden (VA)Rated Burden (VA) Core - 1: 15Core - 1: 15Core - 2: 15Core - 2: 15Core - 3: PSCore - 3: PS

Core - 1: 15Core - 1: 15Core - 2: 15Core - 2: 15

5.5. Class of AccuracyClass of Accuracy Core - 1 : ± 0.5Core - 1 : ± 0.5Core - 2 : 5P Core - 2 : 5P Core - 3 : PS Core - 3 : PS

Core - 1 : 0.5Core - 1 : 0.5Core - 2 : 5P Core - 2 : 5P

6.6. Instrument Security FactorInstrument Security Factor Core - 1 : 10Core - 1 : 10 Core - 1: 10Core - 1: 10

7.7. Accuracy Limit FactorAccuracy Limit Factor Core - 2 : 20Core - 2 : 20Core - 3 : 20Core - 3 : 20

Core - 2 : 20 Core - 2 : 20

8.8. Rated VoltageRated Voltage 12 KV12 KV

9.9. Short Time RatingShort Time Rating 25 KA rms for 3 seconds 25 KA rms for 3 seconds

10.10. Insulation Level :Insulation Level :- Impulse Voltage 1.2/50µs- Impulse Voltage 1.2/50µs wave withstand level wave withstand level- Power frequency 1 min - Power frequency 1 min voltage withstand levelvoltage withstand level

75 KV75 KV

28 KV28 KV


10.610.6 Tests and inspections Tests and inspections

10.6.110.6.1 The CTs shall be tested in accordance with the requirements of the type tests (if required)The CTs shall be tested in accordance with the requirements of the type tests (if required) and routine tests as per the latest issues of IEC: 185 or IS: 2705.and routine tests as per the latest issues of IEC: 185 or IS: 2705.

The tests to be conducted shall include:The tests to be conducted shall include:

10.6.210.6.2 Type TestsType Tests::

Lightning impulse voltage;Lightning impulse voltage;

Power frequency wet withstand voltage;Power frequency wet withstand voltage;

Temperature rise;Temperature rise;

Short time current;Short time current;



Instrument security current (for measuring core);Instrument security current (for measuring core);

Current error and phase displacement (for protection core)Current error and phase displacement (for protection core)

10.6.310.6.3 Routine testRoutine test

Verification of terminal marking and polarity;Verification of terminal marking and polarity;

Power frequency dry withstand test on primary windings;Power frequency dry withstand test on primary windings;

Power frequency dry withstand test on secondary windings;Power frequency dry withstand test on secondary windings;

Power frequency dry withstand test between sections;Power frequency dry withstand test between sections;

Over voltage inter-turn test;Over voltage inter-turn test;


Turn ratio;Turn ratio;


Current error and phase displacement (for protection core);Current error and phase displacement (for protection core);

Knee point voltage and magnetizing current test (for PS class);Knee point voltage and magnetizing current test (for PS class);

Secondary winding resistance ( for PS class )Secondary winding resistance ( for PS class )

11.011.0 POTENTIAL TRANSFORMERPOTENTIAL TRANSFORMER

11.111.1 BASIC TECHNICAL REQUIREMENTSBASIC TECHNICAL REQUIREMENTS

The 11 KV indoor voltage transformers are required to meet the following basicThe 11 KV indoor voltage transformers are required to meet the following basic technical requirements (Reference standards; IEC: 186, IS: 3156 and associatedtechnical requirements (Reference standards; IEC: 186, IS: 3156 and associated standards listed in the specification):standards listed in the specification):

Sl.Sl. No.No.

Particulars Particulars RequirementRequirement


11 TypeType Single phaseSingle phase

22 Nominal system voltage, phase to phaseNominal system voltage, phase to phase 11 KV11 KV

33 Application Application Instrumentation and Metering Instrumentation and Metering

44 Number of secondary windingsNumber of secondary windings 11

55 Rated normal burden*Rated normal burden* 200 VA200 VA

66 Rated primary voltageRated primary voltage 11 KV / √ 311 KV / √ 3

77 Rated secondary voltageRated secondary voltage 110 V / √ 3 / 110 / √ 3110 V / √ 3 / 110 / √ 3

88 Class of accuracyClass of accuracy 0.50.5

99 Rated insulation level : (Primary winding)Rated insulation level : (Primary winding) (Phase to earth)(Phase to earth)

i)i) One minute power frequency withstandOne minute power frequency withstand voltage to earth (wet and dry ) rmsvoltage to earth (wet and dry ) rms

28 KV28 KV

ii)ii) Impulse withstand voltage to earth with 1.2/50Impulse withstand voltage to earth with 1.2/50 µsec. wave of +ve and –ve polarity (Peak )µsec. wave of +ve and –ve polarity (Peak )

75 KV75 KV

1010 One minute Power Frequency withstandOne minute Power Frequency withstand voltage of Secondary windings (rms)voltage of Secondary windings (rms)

i)i) Between phase to earthBetween phase to earth 3 KV 3 KV

ii)ii) Between sectionsBetween sections 3 KV 3 KV

1111 Rated Voltage factorRated Voltage factor

i)i) ContinuousContinuous 1.21.2

ii)ii) for 30 secondsfor 30 seconds 1.51.5

** The burden indicated is the minimum acceptable to the Purchaser. The Contractor shall ensure The burden indicated is the minimum acceptable to the Purchaser. The Contractor shall ensure

that the rated output of the voltage transformers is adequate to meet at least 120 percent of thethat the rated output of the voltage transformers is adequate to meet at least 120 percent of the

connected load (burden).connected load (burden).

11.211.2 GENERALGENERAL

11.2.111.2.1 The voltage transformers to be supplied under this specification shall be of outdoor,The voltage transformers to be supplied under this specification shall be of outdoor, single phase, double wound, oil immersed type, complying with IEC: 185 and IS: 3156single phase, double wound, oil immersed type, complying with IEC: 185 and IS: 3156 suitable for operation in hot and humid atmospheric conditions described in thissuitable for operation in hot and humid atmospheric conditions described in this document. They shall have separate HV and LV windings and shall be suitable for use asdocument. They shall have separate HV and LV windings and shall be suitable for use as bus VTs in 33/11 KV primary substations. bus VTs in 33/11 KV primary substations.

11.311.3 Duty requirementDuty requirement

11.3.111.3.1 11 KV Voltage transformers for all the indicating instruments and measuring meters in11 KV Voltage transformers for all the indicating instruments and measuring meters in


the primary substation on 11 KV side. It shall be of indoor, 1 – phase or 3 – phase resinthe primary substation on 11 KV side. It shall be of indoor, 1 – phase or 3 – phase resin

cast.cast.

11.411.4 CORECORE

11.4.111.4.1 High grade non-ageing cold rolled grain oriented (CRGO – M4 or better) silicon steelHigh grade non-ageing cold rolled grain oriented (CRGO – M4 or better) silicon steel laminations of low hysteresis loss and permeability shall be used for core so as to ensurelaminations of low hysteresis loss and permeability shall be used for core so as to ensure accuracy at both normal and or over voltages. The flux density shall be limited to 1.6accuracy at both normal and or over voltages. The flux density shall be limited to 1.6 Tesla at normal voltage and frequency. There shall be no saturation at any stage duringTesla at normal voltage and frequency. There shall be no saturation at any stage during operation. operation.

11.4.211.4.2 The instrument security factor of the core shall be low enough so as not to cause damageThe instrument security factor of the core shall be low enough so as not to cause damage to the instruments in the event of maximum short circuit current or over voltages.to the instruments in the event of maximum short circuit current or over voltages.

11.511.5 WINDINGSWINDINGS

11.5.111.5.1 The primary and secondary windings shall be electrolytic copper of high purity andThe primary and secondary windings shall be electrolytic copper of high purity and conductivity and covered with double paper insulation. The conductor shall be ofconductivity and covered with double paper insulation. The conductor shall be of adequate cross-section so as to limit the temperature rise even during maximum overadequate cross-section so as to limit the temperature rise even during maximum over voltages.voltages.

11.5.211.5.2 The insulation of windings and connections shall be free from composition liable toThe insulation of windings and connections shall be free from composition liable to soften, ooze, shrink or collapse during service.soften, ooze, shrink or collapse during service.

11.5.311.5.3 The current rating of the primary winding shall be one hundred and fifty percent of theThe current rating of the primary winding shall be one hundred and fifty percent of the normal rated burden and the windings shall be suitable to withstand continuously thenormal rated burden and the windings shall be suitable to withstand continuously the maximum system voltage. The secondary windings of the voltage transformers shall alsomaximum system voltage. The secondary windings of the voltage transformers shall also be suitable for continuous over voltages corresponding to the maximum system voltagebe suitable for continuous over voltages corresponding to the maximum system voltage at the primary winding. The winding supports shall be suitably reinforced to withstandat the primary winding. The winding supports shall be suitably reinforced to withstand normal handling and the thermal and dynamic stresses during operation without damage.normal handling and the thermal and dynamic stresses during operation without damage.

11.5.411.5.4 The voltage transformer secondary circuits will be taken out to form the star point andThe voltage transformer secondary circuits will be taken out to form the star point and earthed at one point outside the voltage transformers.earthed at one point outside the voltage transformers.

11.5.511.5.5 Both primary and secondary winding terminals shall be clearly and indelibly marked toBoth primary and secondary winding terminals shall be clearly and indelibly marked to show polarity in accordance with IEC: 186. The connections required for differentshow polarity in accordance with IEC: 186. The connections required for different secondary windings in case of multi-winding voltage transformers shall be clearlysecondary windings in case of multi-winding voltage transformers shall be clearly indicated in terminal blocks and the wiring diagrams.indicated in terminal blocks and the wiring diagrams.

11.611.6 FITTING AND ACCESSORIES FITTING AND ACCESSORIES

11.6.111.6.1 Fittings and accessories listed below shall be supplied with each voltage transformer:Fittings and accessories listed below shall be supplied with each voltage transformer:

H.V terminal;H.V terminal; two earthing terminals with necessary nuts, bolts and washers;two earthing terminals with necessary nuts, bolts and washers; name and rating plate;name and rating plate; secondary terminal box with LV terminal connections;secondary terminal box with LV terminal connections; mounting nuts, bolts and washers;mounting nuts, bolts and washers; L.V HRC cartridge fuses for the protection of secondary windingL.V HRC cartridge fuses for the protection of secondary winding

11.6.211.6.2 Any other fitting deemed essential by the Contractor shall also be supplied along withAny other fitting deemed essential by the Contractor shall also be supplied along with each voltage transformer:each voltage transformer:

11.6.211.6.2 The name and rating plate shall contain all the particulars as provided in IEC: 186 andThe name and rating plate shall contain all the particulars as provided in IEC: 186 and


also the name of the employer and year of manufacture. They shall comply with thealso the name of the employer and year of manufacture. They shall comply with the clause termed label in this specification.clause termed label in this specification.

11.711.7 Fuse protectionFuse protection

11.7.111.7.1 The Primary and secondary windings shall be protected by HV/ LV HRC cartridge fusesThe Primary and secondary windings shall be protected by HV/ LV HRC cartridge fuses in fuse holder consisting of carriers and bases. The carriers and bases shall be of highin fuse holder consisting of carriers and bases. The carriers and bases shall be of high grade flame retarding and non hygroscopic moulded insulation materials with hard glassgrade flame retarding and non hygroscopic moulded insulation materials with hard glass surface. Each fuse shall be identified with engraved plastic label.surface. Each fuse shall be identified with engraved plastic label.


11.8.111.8.1 A durable copy of the circuit wiring diagram shall be affixed to the inner side of theA durable copy of the circuit wiring diagram shall be affixed to the inner side of the terminal box cover. Labels shall be provided inside the cover to describe the functions ofterminal box cover. Labels shall be provided inside the cover to describe the functions of various items of equipments.various items of equipments.

11.911.9 TERMINATION TERMINATION

11.9.111.9.1 The equipment shall be supplied with HV electrical connection terminals of a size andThe equipment shall be supplied with HV electrical connection terminals of a size and rating appropriate for all the duties, including overload duty specified for the equipment.rating appropriate for all the duties, including overload duty specified for the equipment. The terminals shall be of bi-metallic type.The terminals shall be of bi-metallic type.

11.1011.10 EARTHING TERMINALEARTHING TERMINAL

11.10.111.10.1 Two earthing terminals complete with necessary hardware shall be provided on eachTwo earthing terminals complete with necessary hardware shall be provided on each voltage transformer for connecting to earth continuity conductors of the Employer. Theyvoltage transformer for connecting to earth continuity conductors of the Employer. They shall be of electroplated brass and of adequate size to carry the earth fault current.shall be of electroplated brass and of adequate size to carry the earth fault current.

11.10.211.10.2 The earthing terminals shall be identified by means of appropriate symbol marked in aThe earthing terminals shall be identified by means of appropriate symbol marked in a legible and indelible manner adjacent to the terminals.legible and indelible manner adjacent to the terminals.

11.1111.11 TESTS AND INSPECTIONS TESTS AND INSPECTIONS

11.11.111.11.1 The voltage transformers shall be tested in accordance with the requirements of the typeThe voltage transformers shall be tested in accordance with the requirements of the type tests (if required) and routine tests as provided in the latest issues of IEC: 186 of IS:tests (if required) and routine tests as provided in the latest issues of IEC: 186 of IS: 3516.3516.

The tests to be conducted shall include :The tests to be conducted shall include :

11.11.211.11.2 Type tests :Type tests :

Lightning impulse voltage test;Lightning impulse voltage test; High voltage power frequency wet withstand voltage;High voltage power frequency wet withstand voltage; Temperature rise test;Temperature rise test; Short circuit withstand capability test;Short circuit withstand capability test; Determination of limits of voltage error and phase displacement.Determination of limits of voltage error and phase displacement.

11.11.311.11.3 Routine tests:Routine tests:

Verification of terminal marking and polarity;Verification of terminal marking and polarity; Power frequency withstand tests on primary winding;Power frequency withstand tests on primary winding; Power frequency dry withstand tests on secondary winding;Power frequency dry withstand tests on secondary winding;

Power frequency withstand tests between sections;Power frequency withstand tests between sections; Determination of limits of voltage errors and phase displacement;Determination of limits of voltage errors and phase displacement; Insulation Resistance measurement;Insulation Resistance measurement; Partial discharge measurementPartial discharge measurement


11.11.411.11.4 TEMPERATURE RISETEMPERATURE RISE

The temperature rise of any part of the voltage transformer under continuous operationThe temperature rise of any part of the voltage transformer under continuous operation and exposed in the direct rays of the sun shall not exceed the permissible limits asand exposed in the direct rays of the sun shall not exceed the permissible limits as provided in IEC publication 186 or IS: 3156. These shall not be exceeded when correctedprovided in IEC publication 186 or IS: 3156. These shall not be exceeded when corrected for the difference between the ambient temperature at site and the ambient temperaturefor the difference between the ambient temperature at site and the ambient temperature specified in the standard. The correction proposed shall be stated in the bid.specified in the standard. The correction proposed shall be stated in the bid.

12.012.0 PROTECTIVE RELAY & CONTROL PANELPROTECTIVE RELAY & CONTROL PANEL

12.112.1 Control panel (Indoor) with protective relay and meters shall be provided by the supplierControl panel (Indoor) with protective relay and meters shall be provided by the supplier suitable for above breakers. The equipment shall have protection scheme with thesuitable for above breakers. The equipment shall have protection scheme with the following relays:following relays:

i)i) Triple pole IDMTL type combined over current ( 2 Nos.) & Earth fault ( 1 No),Triple pole IDMTL type combined over current ( 2 Nos.) & Earth fault ( 1 No), Draw out type, 1.3sec, 110V DC Relays (Electro-mechanical or Numerical non-Draw out type, 1.3sec, 110V DC Relays (Electro-mechanical or Numerical non-communicable type). communicable type).

Plug setting range of the over current relays shall be 50% to 200% and that of the earthPlug setting range of the over current relays shall be 50% to 200% and that of the earth fault relay as 10% to 40% in case of electromechanical relays.fault relay as 10% to 40% in case of electromechanical relays.Or PSR: – 5 % to 250 % for O/C & E/F Relays in non-communicable Numerical Relays.Or PSR: – 5 % to 250 % for O/C & E/F Relays in non-communicable Numerical Relays.

ii)ii) 3 element auxiliary relay (110V DC) for transformer fault, trip for Buchholtz3 element auxiliary relay (110V DC) for transformer fault, trip for Buchholtz winding temperature & oil temperature.winding temperature & oil temperature.

iii)iii) Master trip relay (110V DC) for inter tripping Master trip relay (110V DC) for inter tripping

iv)iv) One alarm bell scheme with bell (110 V AC)One alarm bell scheme with bell (110 V AC)

N.B. : - N.B. : - 1) The relay should be Areva, Easun, Ashida, ABB or of any reputed make. Deviations, if any1) The relay should be Areva, Easun, Ashida, ABB or of any reputed make. Deviations, if any should be mentioned.should be mentioned.

2) Non-communicable type NUMERICAL RELAY of any reputed make e.g. AREVA, ABB,2) Non-communicable type NUMERICAL RELAY of any reputed make e.g. AREVA, ABB, SIEMENS, C&S Protection & control with GE.SIEMENS, C&S Protection & control with GE.

13.013.0 METERS :METERS :

The following meters will be provided.The following meters will be provided.

i) Ammeter:- 0-150-300-600A- 1No Digital preferable Make IMP / AE or any reputedi) Ammeter:- 0-150-300-600A- 1No Digital preferable Make IMP / AE or any reputed make.make.

ii) Volt meter – 0 - 15 KV - 1 No Digital, preferable make IMP / AE or reputed makeii) Volt meter – 0 - 15 KV - 1 No Digital, preferable make IMP / AE or reputed make (for Transformer panels only)(for Transformer panels only)

iii) Ammeter selector switch – 1 No. preferable Make – Kaycee or any other reputediii) Ammeter selector switch – 1 No. preferable Make – Kaycee or any other reputed makemake

iv) Volt meter selector switch – 1 No. preferable Make – Kaycee or any other reputediv) Volt meter selector switch – 1 No. preferable Make – Kaycee or any other reputed makemake

v) 40 watt lamp with switch – 1Nov) 40 watt lamp with switch – 1No

vi) Plug & Socket - 1 No.vi) Plug & Socket - 1 No.

vii) Fuses & Links – 1 No.vii) Fuses & Links – 1 No.


i)i) Test terminal Blocks – Test terminal Block need be provided for testing relays &Test terminal Blocks – Test terminal Block need be provided for testing relays & breakers in test position.breakers in test position.

ix) Indication Lamp - Red - Breaker “ON”ix) Indication Lamp - Red - Breaker “ON”

(24 V DC LED type) Green - Breaker “OFF” (24 V DC LED type) Green - Breaker “OFF”

Amber - Breaker “ AUTO TRIP” Amber - Breaker “ AUTO TRIP”

Blue – spring charge indication Blue – spring charge indication

White – Healthy Trip illuminated push bottom switch White – Healthy Trip illuminated push bottom switch

x) Suitable length of wires should be provided for connecting 3 Ph., 3 Wire HTTV meter.x) Suitable length of wires should be provided for connecting 3 Ph., 3 Wire HTTV meter.

14.014.0 INDOOR CONTROL - RELAY PANELINDOOR CONTROL - RELAY PANEL

14.114.1 Panel wiring and accessories Panel wiring and accessories

14.1.114.1.1 Wiring Wiring

Each panel shall be supplied complete with all internal wirings.Each panel shall be supplied complete with all internal wirings.

14.1.214.1.2 Panel wiring shall be suitably bunched and clamped for neat appearance. The conductorsPanel wiring shall be suitably bunched and clamped for neat appearance. The conductors used for wiring purpose shall be PVC insulated 1100 volt grade semi-flexible heatused for wiring purpose shall be PVC insulated 1100 volt grade semi-flexible heat resistant, flame retardant and vermin proof electrolytic copper cable conforming to IEC:resistant, flame retardant and vermin proof electrolytic copper cable conforming to IEC: 227, 502 or IS : 1554. The wiring shall be securely supported and taken through PVC227, 502 or IS : 1554. The wiring shall be securely supported and taken through PVC troughs. Each wire shall be continuous from end to end without any joint in between. Alltroughs. Each wire shall be continuous from end to end without any joint in between. All panel wiring shall be capable of withstanding a voltage of 2 KV AC 50 Hz for onepanel wiring shall be capable of withstanding a voltage of 2 KV AC 50 Hz for one minute.minute.

14.1.314.1.3 Cable and wire for connections within the switchgear and between the switchgear andCable and wire for connections within the switchgear and between the switchgear and terminal blocks shall have a minimum temperature rating of 90 degree Celsius. The sizesterminal blocks shall have a minimum temperature rating of 90 degree Celsius. The sizes of the conductors for panel wiring shall be not less than 2.5 sq. mm. For CT secondaryof the conductors for panel wiring shall be not less than 2.5 sq. mm. For CT secondary wiring, two such wires shall be used in parallel or 4sqmm cable to be usedwiring, two such wires shall be used in parallel or 4sqmm cable to be used

14.1.414.1.4 Panel wiring protection Panel wiring protection

The panels shall be equipped with links and HRC cartridge fuses conforming to IEC:269 or IS:The panels shall be equipped with links and HRC cartridge fuses conforming to IEC:269 or IS: 13703 in 1.1KV grade phenolic moulded fuse holder consisting of fuse carrier and base or13703 in 1.1KV grade phenolic moulded fuse holder consisting of fuse carrier and base or miniature circuit breakers conforming to IEC: 947-2 or IS: 13947-2 at appropriate locations. Theminiature circuit breakers conforming to IEC: 947-2 or IS: 13947-2 at appropriate locations. The carriers and bases shall be made of high grade flame retardant and non hygroscopic phenoliccarriers and bases shall be made of high grade flame retardant and non hygroscopic phenolic moulded material with hard glass surface. Each fuse or MCB shall be identified with engravedmoulded material with hard glass surface. Each fuse or MCB shall be identified with engraved plastic label.plastic label.

14.1.514.1.5 In general, fuses and MCBs shall be limited to the minimum required for safety . TheIn general, fuses and MCBs shall be limited to the minimum required for safety . The protection scheme shall include fuses for VT secondary circuits and DC supply to eachprotection scheme shall include fuses for VT secondary circuits and DC supply to each panel and fuses or MCB for spring charging motor and incoming AC supply.panel and fuses or MCB for spring charging motor and incoming AC supply.

15.015.0 Terminal blocks Terminal blocks

15.115.1 Terminal blocks of brass studs rated for 10 amps. continuous current, 650 volt DC grade Terminal blocks of brass studs rated for 10 amps. continuous current, 650 volt DC grade covered by moulded insulating materials with adequate electrical clearances shall be covered by moulded insulating materials with adequate electrical clearances shall be provided for terminating the panel wiring and outgoing connections. The termination provided for terminating the panel wiring and outgoing connections. The termination


shall be made by crimping lugs or bare conductor with insulating sleeves at ends. The shall be made by crimping lugs or bare conductor with insulating sleeves at ends. The arrangement can be horizontal or vertical as per standard practice adopted by the arrangement can be horizontal or vertical as per standard practice adopted by the manufacturer. All terminals must be numbered and wire termination provided with manufacturer. All terminals must be numbered and wire termination provided with numbered ferrules for identification. All numbering and marking including those in numbered ferrules for identification. All numbering and marking including those in wiring diagram shall follow the guidelines provided in IS : 11353. All circuit breaker wiring diagram shall follow the guidelines provided in IS : 11353. All circuit breaker auxiliary contracts including spare contacts shall be wired to the terminal blocks. Ten auxiliary contracts including spare contacts shall be wired to the terminal blocks. Ten percent spare terminals shall be provided.percent spare terminals shall be provided.

16.016.0 Colour and numbering Colour and numbering

16.116.1 The wiring used for 230 V AC supply for illumination lamp, panel heater and other The wiring used for 230 V AC supply for illumination lamp, panel heater and other devices shall be coloured. The colour of wires connecting directly to Earth shall be devices shall be coloured. The colour of wires connecting directly to Earth shall be green. CT & PT connection wires shall be of R, Y & B colour.green. CT & PT connection wires shall be of R, Y & B colour.

16.216.2 Engraved core identification plastic ferrules marked to correspond with the panel wiring Engraved core identification plastic ferrules marked to correspond with the panel wiring diagram shall be fixed at both ends of each wire. Ferrules shall fit tightly on the wire and diagram shall be fixed at both ends of each wire. Ferrules shall fit tightly on the wire and shall not fall off when the wire is disconnected from the terminal block. Numbers 6 and shall not fall off when the wire is disconnected from the terminal block. Numbers 6 and 9, if used shall be under scored to enable differentiation. 9, if used shall be under scored to enable differentiation.


17.117.1 A durable copy of the circuit wiring diagram shall be affixed to the inner side of the doorA durable copy of the circuit wiring diagram shall be affixed to the inner side of the door of the switchgear compartment. Labels shall be provided inside the compartment to of the switchgear compartment. Labels shall be provided inside the compartment to described the functions of the various items of equipment.described the functions of the various items of equipment.

17.217.2 The scope of supply shall include the panel mounting base plate and all special The scope of supply shall include the panel mounting base plate and all special equipment, bolts, nuts and washers necessary for making the supporting.equipment, bolts, nuts and washers necessary for making the supporting.

18.018.0 OPERATING MECHANISMOPERATING MECHANISM


18.1.118.1.1 The operating mechanism of the circuit breaker shall be motor wound spring charged The operating mechanism of the circuit breaker shall be motor wound spring charged type. It shall be electrically and mechanically trip free with anti pumping device ( as per type. It shall be electrically and mechanically trip free with anti pumping device ( as per IEC 694 definition ). All working parts in the mechanism shall be of corrosion resistant IEC 694 definition ). All working parts in the mechanism shall be of corrosion resistant material. Self lubricating, wear resistant bearings shall be provided in the mechanism.material. Self lubricating, wear resistant bearings shall be provided in the mechanism.

18.1.218.1.2 The mechanism shall fully close the circuit breaker and sustain it in the closed position The mechanism shall fully close the circuit breaker and sustain it in the closed position against the forces of the rated making current and shall fully open the circuit breaker against the forces of the rated making current and shall fully open the circuit breaker without undue contact bounce at a speed commensurate with that shown by tests to be without undue contact bounce at a speed commensurate with that shown by tests to be necessary to achieve the rated breaking capacity in accordance with IEC : 56 or necessary to achieve the rated breaking capacity in accordance with IEC : 56 or IS:13118. The mechanism shall be capable of being locked in either the open or closed IS:13118. The mechanism shall be capable of being locked in either the open or closed position. The mechanism shall be capable of fully closing and opening again after the position. The mechanism shall be capable of fully closing and opening again after the auto-reclose time interval specified as 0.3 second in this specification.auto-reclose time interval specified as 0.3 second in this specification.

18.218.2 Spring mechanismSpring mechanism

18.2.118.2.1 The spring operating mechanism shall be complete with spring charging motor, opening The spring operating mechanism shall be complete with spring charging motor, opening and closing springs with limit switches and all accessories necessary for automatic and closing springs with limit switches and all accessories necessary for automatic

charging. In normal operation, recharging of the operating springs shall commence charging. In normal operation, recharging of the operating springs shall commence immediately and automatically upon completion of the closing operation so that a immediately and automatically upon completion of the closing operation so that a complete sequence of closing and opening operation should be possible.complete sequence of closing and opening operation should be possible.

18.2.218.2.2 It shall be possible to hand charge the operating springs with the circuit breaker in either It shall be possible to hand charge the operating springs with the circuit breaker in either


the open or closed position conveniently from the ground level. Closure whilst a spring the open or closed position conveniently from the ground level. Closure whilst a spring charging operation is in progress shall be prevented and release of the springs shall not charging operation is in progress shall be prevented and release of the springs shall not be possible until they are fully charged. be possible until they are fully charged.

18.2.318.2.3 The state of charge of the operating springs shall be indicated by a mechanical device The state of charge of the operating springs shall be indicated by a mechanical device showing ‘SPRING CHARGED’ when closing spring is fully charged and operation is showing ‘SPRING CHARGED’ when closing spring is fully charged and operation is permissible and ‘SPRING’ FREE’ when closing spring is not fully charged and the permissible and ‘SPRING’ FREE’ when closing spring is not fully charged and the operation is not possible. Provision shall be made for remote electrical indication of operation is not possible. Provision shall be made for remote electrical indication of ‘Spring Charged’ and ‘Spring Free’ conditions.‘Spring Charged’ and ‘Spring Free’ conditions.

18.2.418.2.4 The operating mechanism shall be such that the failure of any auxiliary spring shall not The operating mechanism shall be such that the failure of any auxiliary spring shall not cause tripping or closing the circuit breaker but shall not prevent tripping against trip cause tripping or closing the circuit breaker but shall not prevent tripping against trip command.command.

18.2.518.2.5 Closing action of the circuit breaker shall charge the opening spring ready for tripping . Closing action of the circuit breaker shall charge the opening spring ready for tripping . From the close position with spring charged, one open-close-open operation shall be From the close position with spring charged, one open-close-open operation shall be possible without recharging the springpossible without recharging the spring..

18.318.3 MotorMotor

18.3.118.3.1 The motor for spring charging shall be single phase 230 Volt A.C motor. Continuous The motor for spring charging shall be single phase 230 Volt A.C motor. Continuous motor rating shall be at least ten percent above the maximum load demand of the driven motor rating shall be at least ten percent above the maximum load demand of the driven equipment. It shall remain within its rated capacity at all operating points that will arise equipment. It shall remain within its rated capacity at all operating points that will arise in service. It shall be protected by H.R.C catridge fuses or MCB. The motor shall complyin service. It shall be protected by H.R.C catridge fuses or MCB. The motor shall comply with IEC:34 or IS:996. with IEC:34 or IS:996.

19.019.0 AUXILIARY POWER SUPPLYAUXILIARY POWER SUPPLY

19.119.1 The operating mechanism shall be suitable to operate with the following auxiliary power The operating mechanism shall be suitable to operate with the following auxiliary power supplies supplies

a)a) 230 V, 50 Hz, single phase A.C230 V, 50 Hz, single phase A.C -- for spring charging motorfor spring charging motorb)b) DC supply 110 VoltsDC supply 110 Volts -- for close and open coils for close and open coils c)c) Power pack is to be provided in all breaker panels. Power pack is to be provided in all breaker panels.

19.219.2 The DC supply shall be fed from Station Battery. The DC supply shall be fed from Station Battery.

19.319.3 The mechanism shall be designed to operate satisfactorily despite fluctuations of The mechanism shall be designed to operate satisfactorily despite fluctuations of auxiliary power supplies as under:auxiliary power supplies as under:

DC Supply:DC Supply: VoltageVoltage from 120% to 70% of normal voltagefrom 120% to 70% of normal voltage

20.020.0 PROTECTION AND METERING 20.120.1 Protective relays and metering will be provided in an indoor type control panel in

Purchaser’s control room. The circuit breaker shall be particularly suitable for the following protection schemes: Inter-tripping of other breakersInter-tripping of other breakers Simultaneous tripping of other circuit breaker.Simultaneous tripping of other circuit breaker.

21.021.0 TEMPERATURE RISETEMPERATURE RISE

21.121.1 The temperature rise and the maximum temperature of any part of the circuit breaker underThe temperature rise and the maximum temperature of any part of the circuit breaker under continuous load condition and exposed in the direct rays of the sun shall not exceed the continuous load condition and exposed in the direct rays of the sun shall not exceed the permissible limits as provided in Table V of IEC publication 694 or table 4 of IS : 12729. permissible limits as provided in Table V of IEC publication 694 or table 4 of IS : 12729.


These limits shall not be exceeded when corrected for the difference between the ambient These limits shall not be exceeded when corrected for the difference between the ambient temperature at site and the ambient temperature specified in the standard. The correction temperature at site and the ambient temperature specified in the standard. The correction proposed shall be stated in the tender.proposed shall be stated in the tender.

22.022.0 TESTSTESTS

22.122.1 Type and routine testsType and routine tests

The circuit breakers shall be subjected to routine and type tests in accordance with the The circuit breakers shall be subjected to routine and type tests in accordance with the standards listed in this specification including the following IEC and IS standards with the standards listed in this specification including the following IEC and IS standards with the latest amendments:latest amendments:

Circuit breaker IEC: 56 and IS: 13118 and relevant other standards.Circuit breaker IEC: 56 and IS: 13118 and relevant other standards. Cast Resin insulator IEC: 233 and IS: 5621 and relevant other standards.Cast Resin insulator IEC: 233 and IS: 5621 and relevant other standards.

The tests shall include but not limited to the following:The tests shall include but not limited to the following:

22.222.2 Short circuit testsShort circuit tests

The circuit breaker shall satisfactorily perform the out of phase and short circuit duties The circuit breaker shall satisfactorily perform the out of phase and short circuit duties specified in IEC: 56, IEC: 17A (Sect.) 438 and IEC: 17A/CD/474 and IS: 13118 and IS: specified in IEC: 56, IEC: 17A (Sect.) 438 and IEC: 17A/CD/474 and IS: 13118 and IS: 13516.13516.

The circuit breaker shall be capable of performing at least twenty five (25) open operationsThe circuit breaker shall be capable of performing at least twenty five (25) open operations at the rated short circuit current before maintenance or inspection is required.at the rated short circuit current before maintenance or inspection is required.

22.322.3 Capacitive current switchingCapacitive current switching

Capacitive switching tests shall be performed in accordance with IEC: 56 or IS: 13118 and Capacitive switching tests shall be performed in accordance with IEC: 56 or IS: 13118 and IEC: 17A/CD/474 at 1.3U preferably by direct test method or alternatively using synthetic IEC: 17A/CD/474 at 1.3U preferably by direct test method or alternatively using synthetic method to IEC: 427 or IS: 13516. The test circuits shall simulate the most onerous site method to IEC: 427 or IS: 13516. The test circuits shall simulate the most onerous site conditions.conditions.

22.422.4 Reactor Switching Reactor Switching In addition to the capacitive current switching tests to IEC: 56 or IS: 13118 and In addition to the capacitive current switching tests to IEC: 56 or IS: 13118 and IEC:17A/CD/474, the circuit breakers shall be tested for shunt reactor switching in IEC:17A/CD/474, the circuit breakers shall be tested for shunt reactor switching in accordance with IEC :1233. Examination of the interrupter after the tests shall not show accordance with IEC :1233. Examination of the interrupter after the tests shall not show any evidence of surface tracking or erosion of contacts. any evidence of surface tracking or erosion of contacts.

22.522.5 Dielectric testsDielectric testsAt zero gauge loss of vacuum inside the interrupter chamber, the open contacts shall At zero gauge loss of vacuum inside the interrupter chamber, the open contacts shall withstand continuously the rated phase to ground voltage and it shall be possible to break withstand continuously the rated phase to ground voltage and it shall be possible to break normal current in these conditions. During the dielectric type tests, no flashover external ornormal current in these conditions. During the dielectric type tests, no flashover external or internal shall be acceptable.internal shall be acceptable.

The circuit breakers shall be subjected to a power frequency AC voltage test for one The circuit breakers shall be subjected to a power frequency AC voltage test for one minute in dry and wet conditions and there shall be no external flash over to earth.minute in dry and wet conditions and there shall be no external flash over to earth.

22.622.6 Mechanical enduranceMechanical endurance

In addition to the requirements of IEC:56, an extended mechanical endurance test is In addition to the requirements of IEC:56, an extended mechanical endurance test is required to show that the circuit breaker is capable of at least 10,000 operations at no load required to show that the circuit breaker is capable of at least 10,000 operations at no load in accordance with IEC: 17A/474/CD. Between the specified test series in IEC: in accordance with IEC: 17A/474/CD. Between the specified test series in IEC:


17A/474/CD, some maintenance such as lubrication and mechanical adjustment is allowed 17A/474/CD, some maintenance such as lubrication and mechanical adjustment is allowed and shall be performed in accordance with manufacturer’s instructions. Change of and shall be performed in accordance with manufacturer’s instructions. Change of contracts is not permitted.contracts is not permitted.

22.722.7 Low current switching Low current switching

The circuit breakers shall produce very low over voltage (<2.0 pu) on all switching circuitsThe circuit breakers shall produce very low over voltage (<2.0 pu) on all switching circuits inductive current including reactor switching to IEC – 1233 switching and capacitive inductive current including reactor switching to IEC – 1233 switching and capacitive current switching to IEC : 17A (Secretariat) 438 and IEC 17A/CD/474 the circuit breaker current switching to IEC : 17A (Secretariat) 438 and IEC 17A/CD/474 the circuit breaker shall be re-ignition or re-strike free for all duties.shall be re-ignition or re-strike free for all duties.

22.822.8 Duty requirement testsDuty requirement tests

Apart from auto-reclosing and the other duties mentioned above, the breakers shall be able Apart from auto-reclosing and the other duties mentioned above, the breakers shall be able to perform the following duties for which type tests are to be conducted as per IEC: 56 or to perform the following duties for which type tests are to be conducted as per IEC: 56 or IS: 13118.IS: 13118.

1. Breaking the steady and the transient magnetising current of the transformer.1. Breaking the steady and the transient magnetising current of the transformer.

2. Breaking 25% of rated fault current at twice the rated voltage as per IEC/IS.2. Breaking 25% of rated fault current at twice the rated voltage as per IEC/IS.

3. Cable charging breaking current.3. Cable charging breaking current.

4. Back-to-back capacitor bank breaking current 4. Back-to-back capacitor bank breaking current

5. Single capacitor bank breaking current.5. Single capacitor bank breaking current.

6. Capacitor bank in rush making current.6. Capacitor bank in rush making current.

Test for the resistance of the main circuit shall also be conducted.Test for the resistance of the main circuit shall also be conducted.

22.922.9 Temperature rise testTemperature rise test

Temperature rise test is to be conducted on the circuit breaker and the accessories in Temperature rise test is to be conducted on the circuit breaker and the accessories in accordance with IEC: 56 or IS: 13118. The temperature rise shall be limited as per this accordance with IEC: 56 or IS: 13118. The temperature rise shall be limited as per this specification.specification.

23.0.23.0. PERFORMANCE REQUIREMENTSPERFORMANCE REQUIREMENTS

The supplier shall declare the circuit breaker opening and closing times at 120 percent, 100The supplier shall declare the circuit breaker opening and closing times at 120 percent, 100 percent and 70 per cent of the rated voltage of the opening and closing devices when percent and 70 per cent of the rated voltage of the opening and closing devices when measured at the terminals of the trip and closing coils. The minimum make break time at measured at the terminals of the trip and closing coils. The minimum make break time at rated voltage and total break time of the CB shall be stated. The total break time must not rated voltage and total break time of the CB shall be stated. The total break time must not exceed 80 m. sec.exceed 80 m. sec.

24.024.0 EARTHINGEARTHING

24.124.1 All metal parts not intended for carrying current or not alive shall be connected to All metal parts not intended for carrying current or not alive shall be connected to duplicate earthing system and suitable electroplated brass running earth terminals shall be duplicate earthing system and suitable electroplated brass running earth terminals shall be provided on each circuit breaker in conformity with IEC : 56 or IS: 13118. Suitable provided on each circuit breaker in conformity with IEC : 56 or IS: 13118. Suitable

identification mark for the earth terminals shall be provided adjacent to the terminal. Earth identification mark for the earth terminals shall be provided adjacent to the terminal. Earth continuity conductors shall be provided down to the ground level for earth connection to continuity conductors shall be provided down to the ground level for earth connection to Purchaser’s earth grid. It shall have sufficient cross sectional area to afford a low resistancePurchaser’s earth grid. It shall have sufficient cross sectional area to afford a low resistance path for the full fault current envisaged. path for the full fault current envisaged.


24.224.2 The size of the earth continuity conductor shall be large enough to reduce the potential rise The size of the earth continuity conductor shall be large enough to reduce the potential rise of the metal frame of the breaker in the event of fault to minimum but in any case not moreof the metal frame of the breaker in the event of fault to minimum but in any case not more than 10 V. The size of the conductor shall also be adequate to restrict the temperature rise than 10 V. The size of the conductor shall also be adequate to restrict the temperature rise without causing any damage to the earth connection in the case of fault. No riveted joints without causing any damage to the earth connection in the case of fault. No riveted joints in the earth conducting path shall be permissible and only bolted joints of adequate size in the earth conducting path shall be permissible and only bolted joints of adequate size shall be provided with nuts, bolts and plain and spring washers. The surfaces to be jointed shall be provided with nuts, bolts and plain and spring washers. The surfaces to be jointed shall be perfectly flat without any unevenness to ensure that there is no contact resistance.shall be perfectly flat without any unevenness to ensure that there is no contact resistance.

24.324.3 An earth busbar of copper strip 50 X 12 mm size with current density more than 186 Amp/An earth busbar of copper strip 50 X 12 mm size with current density more than 186 Amp/ cmcm22 shall be provided along the width & entire cubicle to which all earth connections must shall be provided along the width & entire cubicle to which all earth connections must be made. The earth busbar shall be terminated into two electroplated brass earthing be made. The earth busbar shall be terminated into two electroplated brass earthing terminals of adequate size with nuts, bolts and washers for connecting to earth continuity terminals of adequate size with nuts, bolts and washers for connecting to earth continuity conductor mentioned above.conductor mentioned above.

25.025.0 Mandatory Spare Parts for 11 KV Indoor VCBMandatory Spare Parts for 11 KV Indoor VCB

The supplier shall provide the mandatory spares as follows:The supplier shall provide the mandatory spares as follows:

26.0. BILL OF MATERIALS FOR 3 PANEL 11 KV INDOOR VCB26.0. BILL OF MATERIALS FOR 3 PANEL 11 KV INDOOR VCB

Seri

al N

o.Se

rial

No.

ITEMITEMIN

CO

ME

RIN

CO

ME

R

TR

FT

RF

OU

TO

UT

G

OIN

GG

OIN

G

B/CB/C

FEEDER TYPE FEEDER TYPE →→ DESIGNATION DESIGNATION →→ I/CI/C O/GO/G B/CB/C

QUANTITY QUANTITY →→ 22 44 11

11 Indicating lampsIndicating lamps

a) ON (RED)a) ON (RED) 11 11

b)b) OFF (GREEN) OFF (GREEN) 11 11

c)c) Auto Trip (Amber) Auto Trip (Amber) 11 11

d)d) Trip Circuit Healthy ( White ) Trip Circuit Healthy ( White ) 11 11

e) Spring Charged ( Blue ) e) Spring Charged ( Blue ) 11 11

22 Trip- Neutral-close switch spring return to neutralTrip- Neutral-close switch spring return to neutral 11 11


33 Digital Volt MeterDigital Volt Meter with suitable scale & selector switch. with suitable scale & selector switch. 11 1144 Digital Ammeter Digital Ammeter with suitable scale & selector switch.with suitable scale & selector switch. 11 11

55 HT Trivector Meter with SCADA COMPATIBILITYHT Trivector Meter with SCADA COMPATIBILITY 11 1166 Local/Remote SwitchLocal/Remote Switch 11 11

77 Cast resin insulated draw out type star-star connected Potential Transformer withCast resin insulated draw out type star-star connected Potential Transformer with the following specifications :the following specifications :

RATIORATIO VA BURDENVA BURDEN CLASSCLASS

11000/√3 / 110/√3 100 VA 111000/√3 / 110/√3 100 VA 1 11 --

88 Cast resin insulated Current Transformer with ICast resin insulated Current Transformer with I thth of 25 kA at 11 KV for 3sec. as per of 25 kA at 11 KV for 3sec. as per details :details :

RATIORATIO VA BURDENVA BURDEN CLASSCLASS

600-300/ 5-5 30 0.5/5P10/PS 600-300/ 5-5 30 0.5/5P10/PS 33 --

400-200/5-5 30 0.5/5P10400-200/5-5 30 0.5/5P10 -- 33

99 Electro-mechanical/ Numerical non communicableElectro-mechanical/ Numerical non communicable type non directional O/C & type non directional O/C & E/F Relay with a setting of 5-250% both in O/C & E/FE/F Relay with a setting of 5-250% both in O/C & E/F 11 11

1010 Master Trip Relay Master Trip Relay 11 111111 Trip Circuit Supervision Relay Trip Circuit Supervision Relay 11 111212 Voltage operated Auxiliary Relay for Transformer AnnunciationVoltage operated Auxiliary Relay for Transformer Annunciation 11 --1313 Transformer Differential Relay for High end 33KV Hook upTransformer Differential Relay for High end 33KV Hook up -- --

1414 12 windows Annunciation facia12 windows Annunciation facia -- --

1515 Panel space heater with switch, fuse and thermostatPanel space heater with switch, fuse and thermostat 11 11

1616 Cubicle lamp with switchCubicle lamp with switch 11 11

1717 Sheet steel cubicle, floor mounting, suitable for indoor installation for use on 11 KVSheet steel cubicle, floor mounting, suitable for indoor installation for use on 11 KV 25 kA, 50Hz AC system having PVC sleeved Copper bus bars rated 25 kA, 50Hz AC system having PVC sleeved Copper bus bars rated 1250A1250A,with,with automatic safety shutters (for VCB panel), earth bus of adequate size, foundationautomatic safety shutters (for VCB panel), earth bus of adequate size, foundation channel & bolts, name plates etc. channel & bolts, name plates etc.

22 44 11

1818 Triple pole Horizontal Isolation Horizontal draw out type Vacuum Circuit Breaker Triple pole Horizontal Isolation Horizontal draw out type Vacuum Circuit Breaker rated 11 kV rated 11 kV 1250A1250A Vacuum Interrupter 50 HZ, Short Time current 25 KA , with Vacuum Interrupter 50 HZ, Short Time current 25 KA , with spring charging motor, shunt trip and closing coils suitable spring charging motor, shunt trip and closing coils suitable for 110V DCfor 110V DC supply supply with power pack. with power pack.

22 44 11


ANNEXURE – V (B)ANNEXURE – V (B)

TECHINICAL DATA SCHEDULE FOR 11 KV INDOOR VACUUM CIRCUIT BREAKER TECHINICAL DATA SCHEDULE FOR 11 KV INDOOR VACUUM CIRCUIT BREAKER

ITEM ITEM NONO

DESCRIPTIONDESCRIPTION UNITSUNITS BIDDER’SBIDDER’SOFFEROFFER

1.1. GENERALGENERAL

- Name of manufacture- Name of manufacture- Manufacturer’s type designation - Manufacturer’s type designation - Governing standards- Governing standards- No. of poles of circuit breaker - No. of poles of circuit breaker - No. of breaks per phase- No. of breaks per phase- Total length of break per phase- Total length of break per phase- Type – Vacuum- Type – Vacuum

no.no.no.no.mmmm

Yes / NoYes / No

2.2. NOMINAL VOLTAGESNOMINAL VOLTAGES

- Rated voltage- Rated voltage- Maximum(continuous)service rated voltage- Maximum(continuous)service rated voltage

kVkVkVkV

3.3. RATED NORMAL CURRENTSRATED NORMAL CURRENTS

- Under normal condition- Under normal condition- Under site condition- Under site condition

AmpsAmpsAmpsAmps

4.4. SHORT CIRCUIT PERFORMANCESSHORT CIRCUIT PERFORMANCES

- Rated short circuit breaking current:- Rated short circuit breaking current: Symmetrical, rmsSymmetrical, rms Asymmetrical including DC componentAsymmetrical including DC component

- Rated short circuit making current; peak- Rated short circuit making current; peak

- Short time current withstand capability:- Short time current withstand capability: Peak valuePeak value Rms valueRms value DurationDuration

KAKAKAKA

KAKA

KAKAKAKASecSec

5.5. MAX. TEMP. RISE OVER AMBIENT OF 50MAX. TEMP. RISE OVER AMBIENT OF 5000CC

- At normal continuous current- At normal continuous current- After performing the operating sequence- After performing the operating sequence

00CC00CC

6.6. MAKE AND BREAK TIMES MAKE AND BREAK TIMES

Total break timesTotal break times- At 10% rupturing capacity- At 10% rupturing capacityAt rated rupturing capacityAt rated rupturing capacity

- Arcing time at rated breaking current- Arcing time at rated breaking current- Make time form giving close command- Make time form giving close command

- Minimum reclose time at full rated interrupting- Minimum reclose time at full rated interrupting Capacity from trip coil energisation Capacity from trip coil energisation- Minimum dead time for 3 phase reclosing- Minimum dead time for 3 phase reclosing

milli-secmilli-sec

milli-secmilli-secmilli-secmilli-sec

milli-secmilli-secmilli-secmilli-sec

secsec


ITEM ITEM NONO


- Circuit breaker opening time:- Circuit breaker opening time: at 125% of rated voltage of opening deviceat 125% of rated voltage of opening device at 100% of rated voltage of opening deviceat 100% of rated voltage of opening device at 70% of rated voltage of opening deviceat 70% of rated voltage of opening device

milli-secmilli-secmilli-secmilli-secmilli-secmilli-sec

77 RESTRIKING VOLTAGES FOR 100% RATED RESTRIKING VOLTAGES FOR 100% RATED

CAPACITYCAPACITY

-- Amplitude factorAmplitude factor-- Phase factorPhase factor-- Natural frequencyNatural frequency-- Rate of rise of recovery voltageRate of rise of recovery voltage

KVKV

HzHzKV/µsKV/µs

8.8. RATED INSULATION LEVELRATED INSULATION LEVEL

Dry and wet power frequency withstand test voltage for Dry and wet power frequency withstand test voltage for 1 minute, rms:1 minute, rms:

Between live terminals and grounded objectsBetween live terminals and grounded objects Between terminals with breaker contacts openBetween terminals with breaker contacts open

-- 1.2/50 µs full wave impulse withstand voltage +ve 1.2/50 µs full wave impulse withstand voltage +ve

and - ve polarity, peakand - ve polarity, peak

Between live terminals and grounded objectBetween live terminals and grounded object Between terminals with breaker contacts openBetween terminals with breaker contacts open

-- One mimute power frequency voltage of auxiliary One mimute power frequency voltage of auxiliary wiringwiring

KVKVKVKV

kVkVkVkV

kVkV

99 OPERATING PERFORMANCEOPERATING PERFORMANCE

-- Rated transient recovery voltageRated transient recovery voltage-- Rated cable charging breaking currentRated cable charging breaking current-- Rated single capacitor bank breaking currentRated single capacitor bank breaking current-- Rated back-to-back capacitor bank breaking currentRated back-to-back capacitor bank breaking current-- Rated capacitor bank in-rush making currentRated capacitor bank in-rush making current-- Rated small inductive breaking currentRated small inductive breaking current-- First pole-to-clear factorFirst pole-to-clear factor-- Rated operating sequenceRated operating sequence-- Rated out-of-phase breaking current Rated out-of-phase breaking current -- Re-ignition and Re-strike freeRe-ignition and Re-strike free

KVKVamps.amps.ampsampsampsampsampsampsampsamps

KAKAYes/NoYes/NoYes/NoYes/No

1010 NUMBER OF OPERATION POSSIBLE WITHOUTNUMBER OF OPERATION POSSIBLE WITHOUTMAINTENANCEMAINTENANCE

-- at full rated interrupting currentat full rated interrupting current-- at 50% of rated interrupting currentat 50% of rated interrupting current-- at 100% of full load currentat 100% of full load current-- at no load at no load

no.no.nononononono


ITEM ITEM NONO


1111 WEIGHTS AND DIMENSIONSWEIGHTS AND DIMENSIONS

Total weight of one complete breaker, including mountingTotal weight of one complete breaker, including mounting structure structure Mounting structure weightMounting structure weightControl cabinet weightControl cabinet weightDimensions: Dimensions: HeightHeight Width, Width, Depth DepthDrawings must be providedDrawings must be provided

KgKgKgKgKgKgmmmmmmmmmmmm

1212 CONTACTSCONTACTS

-- Type of main contactsType of main contacts-- Type of auxiliary contactsType of auxiliary contacts-- Material of auxiliary contactsMaterial of auxiliary contacts-- Type of plating, if anyType of plating, if any-- Thickness of platingThickness of plating-- Contact pressureContact pressure

No of auxiliary contacts provided:No of auxiliary contacts provided: Those closed when breaker is closed Those closed when breaker is closed Those open when breaker is closed Those open when breaker is closed Those adjustable Those adjustable

MicronMicrongm/ mmgm/ mm22

nononononono

1313 OPERATING MECHANISMOPERATING MECHANISM

Opening typeOpening typeClosing typeClosing typeForce applied by charged spring for closingForce applied by charged spring for closingTime taken by motor for charging the spring form fullyTime taken by motor for charging the spring form fullyDischarged to fully charged positionDischarged to fully charged positionFull sequence of operationFull sequence of operationWhether limit switches are provided with springWhether limit switches are provided with springWhether spring limit switches start stop the motorWhether spring limit switches start stop the motorType and material of spring employedType and material of spring employedWhether trip freeWhether trip freeWhether anti pumping device providedWhether anti pumping device provided

KgKg

secsec

yes/noyes/noyes/noyes/no

yes/noyes/noyes/noyes/no

14.14. AUXILIARY AND CONTROL POWER AUXILIARY AND CONTROL POWER SUPPLYSUPPLY

-- Normal auxiliary A.C supply voltageNormal auxiliary A.C supply voltage-- Voltage limits for proper operationVoltage limits for proper operation

MaximumMaximum MinimumMinimum

-- Frequency limits for proper operationFrequency limits for proper operation MaximumMaximum MinimumMinimum

-- Normal control circuit voltageNormal control circuit voltage-- DC Voltage limits for proper operationDC Voltage limits for proper operation

MaximumMaximum MaximumMaximum

VoltsVolts

VoltsVoltsVoltsVolts

HzHzHzHz

VoltsVolts

VoltsVoltsVoltsVolts


ITEM ITEM NONO


-- Power required for trip coilPower required for trip coil-- Power required for closing coilPower required for closing coil

WattsWattsWattsWatts

15.15. LOCAL CONTROL PANELLOCAL CONTROL PANEL

-- MaterialMaterial-- Degree of protectionDegree of protection-- Vermin proof provisionsVermin proof provisions-- Weather proof provisionWeather proof provision-- Dust proof provisionDust proof provision-- Ventilation provisionVentilation provision-- Thickness of sheet materials usedThickness of sheet materials used-- Overall dimensionsOverall dimensions-- Total weightTotal weight-- Mounting arrangementMounting arrangement

Yes/noYes/noYes/noYes/noYes/noYes/noYes/noYes/no

mmmmmmmmKgKg

16.16. TERMINAL CONNECTORTERMINAL CONNECTOR

-- MaterialMaterial-- Bi-metallic or notBi-metallic or not-- WeightWeight-- DimensionsDimensions-- Size and type of conductor it can accommodateSize and type of conductor it can accommodate-- Terminal pads silver plated or notTerminal pads silver plated or not-- Thickness of silver platingThickness of silver plating

yes/noyes/noKgKgmmmm

sq mmsq mmyes/noyes/no

micronsmicrons

17.17. CORROSION PREVENTION SYSTEM FORCORROSION PREVENTION SYSTEM FORCIRCUIT BREAKER AND CONTROL CABINETCIRCUIT BREAKER AND CONTROL CABINET -- Surface preparationSurface preparation-- Rust inhibitionRust inhibition-- Zinc thickness/paint thicknessZinc thickness/paint thickness-- Treatment of fastenersTreatment of fasteners

MicronsMicrons

18.18. VACUUM CIRCUIT BREAKER SEALINGVACUUM CIRCUIT BREAKER SEALING

Degree of protection of circuit breaker pole enclosure.Degree of protection of circuit breaker pole enclosure. (IEC 529, IS 13947) (IEC 529, IS 13947)

Method of sealing the circuit breaker pole enclosure. Method of sealing the circuit breaker pole enclosure.19.19. 11KV CURRENT TRANSFORMER11KV CURRENT TRANSFORMER

Category A; Category A;

-- Make and type of transformer (Cast Resin type)Make and type of transformer (Cast Resin type)-- RatioRatioCore1. VA burdenCore1. VA burden Accuracy class Accuracy class Saturation factor Saturation factor Instrument security factor Instrument security factor Accuracy limit factor Accuracy limit factor

VAVA0.50.5

1010


ITEM ITEM NONO


Core 2. VA burdenCore 2. VA burden Accuracy class Accuracy class Saturation factor Saturation factor Accuracy limit factor Accuracy limit factor

Core 3. Accuracy classCore 3. Accuracy class Saturation factor Saturation factor Accuracy limit factor Accuracy limit factor Knee point voltage (Vk) Knee point voltage (Vk) Magnetizing current at Vk/ Magnetizing current at Vk/22

Secondary resistance R Secondary resistance Rctct

Short time current rating, timeShort time current rating, timeImpulse voltage withstand levelImpulse voltage withstand levelPower frequency voltage withstand levelPower frequency voltage withstand level

Primary windingPrimary winding Secondary windingSecondary winding

Specification of cast resinSpecification of cast resin TypeType weightweight

Weight of CT complete Weight of CT complete

VAVA

VoltsVoltsMilli AmpsMilli Amps

OhmsOhms

KA, Sec.KA, Sec.KVKV

KVKVKVKV

KgKgKgKg

20.20. Category B; Category B;

-- Make and type of transformer (Cast Resin type)Make and type of transformer (Cast Resin type)-- RatioRatio

Core1. VA burdenCore1. VA burden Accuracy class Accuracy class Saturation factor Saturation factor Instrument security factor Instrument security factor Accuracy limit factor Accuracy limit factor

Core 2. VA burdenCore 2. VA burden Accuracy class Accuracy class Saturation factor Saturation factor Accuracy limit factor Accuracy limit factor

Short time current rating, timeShort time current rating, timeImpulse voltage withstand levelImpulse voltage withstand levelPower frequency voltage withstand levelPower frequency voltage withstand level

Primary windingPrimary winding Secondary windingSecondary winding

Specification of cast resinSpecification of cast resin TypeType weightweight

Weight of CT complete Weight of CT complete

VAVA

VAVA

KA, Sec.KA, Sec.KVKV

KVKVKVKV

KgKgKgKg

ITEM ITEM DESCRIPTIONDESCRIPTION UNITSUNITS BIDDER’SBIDDER’S


NONO OFFEROFFER21.21.1.1.

11 KV VOLTAGE TRANSFORMER (CAST RESIN TYPE)11 KV VOLTAGE TRANSFORMER (CAST RESIN TYPE)

GENERAL.GENERAL.

-- Make Make -- Type of transformerType of transformer-- Rated normal voltageRated normal voltage-- Rated maximum voltageRated maximum voltage-- Rated primary voltageRated primary voltage-- Rated secondary voltageRated secondary voltage-- V A burdenV A burden-- Accuracy classAccuracy class-- Ratio errorRatio error-- Phase displacement positive or negativePhase displacement positive or negative-- Saturation factorSaturation factor-- Instrument security factorInstrument security factor-- Short time current ratingShort time current rating

Rms valueRms value PeriodPeriod Peak valuePeak value

-- Impulse voltage withstand levelImpulse voltage withstand level-- One minute power frequency voltage One minute power frequency voltage -- withstand level of primary winding withstand level of primary winding Specification of cast resinSpecification of cast resin

TypeType weightweight

Weight of VT complete Weight of VT complete -- Overall dimensionsOverall dimensions-- Rated voltage factorRated voltage factor

ContinuousContinuous For 30 secondsFor 30 seconds

-- Temperature rise above the ambient of 50Temperature rise above the ambient of 5000CC-- Correction factorCorrection factor-- Partial discharge levelPartial discharge level

KVKVKVKVKVKV

VoltsVoltsVAVA

MinMin

KAKASecSecKAKAKVKVKVKVKVKV

KgKgKgKgmmmm

00CC

pCpC2.2.

3.3.

CORECORE

- Material composition (CRGO-M4 or better)- Material composition (CRGO-M4 or better)-- Flux density at normal voltage and frequencyFlux density at normal voltage and frequency-- Lamination thicknessLamination thickness

WINDINGSWINDINGS

-- Purity of copper usedPurity of copper used-- Type of insulationType of insulation-- Power frequency withstand levelPower frequency withstand level

Secondary winding to earthSecondary winding to earth Between sectionsBetween sections

TeslaTeslammmm

PercentPercent

KVKVKVKV


ITEM ITEM NONO


4.4.

5.5.

SECONDARY TERMINAL BOXSECONDARY TERMINAL BOX

-- Degree of protectionDegree of protection-- Vermin proof provisionVermin proof provision-- Weather proof provisionWeather proof provision-- Dust proof provisionDust proof provision-- Thickness of metal usedThickness of metal used-- Overall dimensionsOverall dimensions-- Mounting arrangementMounting arrangement

H V TERMINALH V TERMINAL

-- MaterialMaterial-- Bi-metallic or notBi-metallic or not-- Dimensions,Dimensions,-- Size and type of conductor it can accommodateSize and type of conductor it can accommodate

Yes/noYes/noYes/noYes/noYes/noYes/no

mmmmmmmm

Yes/noYes/nommmm

Sq. mmSq. mm

22.22. INSTRUMENTS & METERS (for Relay Panel)INSTRUMENTS & METERS (for Relay Panel)

1.1. Type & make of instruments & meterType & make of instruments & meter2.2. SizeSize3.3. Whether magnetically shielded or notWhether magnetically shielded or not4.4. Limits or error in the effective rangeLimits or error in the effective range5.5. Scale lengthScale length6.6. Whether TropicalisedWhether Tropicalised7.7. Short time overload ratingShort time overload rating8.8. V A Burden.V A Burden.

Current coil Current coil Potential coil Potential coil

9.9. Power consumption current & potential coil Power consumption current & potential coil

RELAYSRELAYS

1.1. Type & make of relayType & make of relay2.2. Current coil ratingCurrent coil rating3.3. Tap rangeTap range4.4. V A Burden Highest tap & lowest tapV A Burden Highest tap & lowest tap5.5. Power consumption Highest tap & lowest tapPower consumption Highest tap & lowest tap6.6. Time of operation at maximum time dial setting atTime of operation at maximum time dial setting at

i)i) 5 times tap setting current 5 times tap setting currentii)ii) 10 times tap setting current 10 times tap setting current

7.7. Type of characteristic Type of characteristic 8.8. Whether draw out type or notWhether draw out type or not9.9. Trip contact ratings Amps.Trip contact ratings Amps.10.10. Whether seal In contacts provided or not Whether seal In contacts provided or not


ITEM ITEM NONO


POWER PACKSPOWER PACKS

1. Rated AC voltage.(Input 230 V AC or 110 V. AC 1. Rated AC voltage.(Input 230 V AC or 110 V. AC output 24 V DC, storage capacity 3 tripping even if output 24 V DC, storage capacity 3 tripping even if input failed).input failed).

2. Single phase or three phase.2. Single phase or three phase.

3.3. Capacity(VA)Capacity(VA)4.4. Power factorPower factor5.5. Type of transformer used, if any, to supply input to Type of transformer used, if any, to supply input to

the rectifierthe rectifier6.6. Transformation ratioTransformation ratio7.7. Type of rectification employed, full wave or half waveType of rectification employed, full wave or half wave 8.8. Type of rectifier connectionType of rectifier connection9.9. Ripple factorRipple factor10.10. Type of filter employedType of filter employed11.11. Ratings of capacitorRatings of capacitor12.12. Time of retention of charge by capacitorTime of retention of charge by capacitor13.13. Value of DC constant.Value of DC constant.14.14. Out put voltage(DC)Out put voltage(DC)15.15. Capacity (Watt-sec)Capacity (Watt-sec)16. No of closing & tripping taken by this pack.16. No of closing & tripping taken by this pack.


BOQ for supply & delivery of 33KV CT & PT out door type, 36 KV 1500BOQ for supply & delivery of 33KV CT & PT out door type, 36 KV 1500 MVA outdoor type VCB, 33KV feeder panel, 11KV indoor type 800MVA VCBMVA outdoor type VCB, 33KV feeder panel, 11KV indoor type 800MVA VCB

for 33/11KV, 2 x 8MVA Substation at Growth Center, Jharsuguda.for 33/11KV, 2 x 8MVA Substation at Growth Center, Jharsuguda.

SlSlNoNo

Description of work.Description of work. UnitUnit Qnty.Qnty. Rate in Rs.Rate in Rs. Amount inAmount in Rs.Rs.

1(a)1(a) Supply & deivery of 33KV CT, asSupply & deivery of 33KV CT, as per the technical specification (1per the technical specification (1 phase) 800/400/200A/1-1-1-1Aphase) 800/400/200A/1-1-1-1A

NosNos 22

(b)(b) Supply & delivery of 33KV CT as perSupply & delivery of 33KV CT as per the technical specification (1the technical specification (1 phase) 400/200/100/1-1-1-1Aphase) 400/200/100/1-1-1-1A

MtrMtr 128128

(c)(c) Supply & delivery of CT ad PT outSupply & delivery of CT ad PT out door type console boxes made outdoor type console boxes made out of 2.0 mm CR Sheets. of 2.0 mm CR Sheets.

NosNos 44

2(a)2(a) Supply & delivery of 36 KV 1500Supply & delivery of 36 KV 1500 MVA outdoor type VCB withMVA outdoor type VCB with required GI structure.required GI structure.

MtrMtr 2020

(b)(b) Supply & delivery of 33 KV feederSupply & delivery of 33 KV feeder CR Panel, as per the technicalCR Panel, as per the technical specification.specification.

MtrMtr 4040

33 Supply & delivery of 11KV indoorSupply & delivery of 11KV indoor type 800 MVA VCB panel withtype 800 MVA VCB panel with 1250A x 2 incomers, 1250A x 1B/C1250A x 2 incomers, 1250A x 1B/C and 800A x 4 outgoings as per theand 800A x 4 outgoings as per the technical specification in thetechnical specification in the technical bid. technical bid.

SetSet 22

44 Supply & delivery of 33 KV PT asSupply & delivery of 33 KV PT as per the technical specification (1per the technical specification (1 Phase)Phase)

Total:Total:

