2.1.1-breaker.doc

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Vol.II Part-I/Section-II

SECTION – II

2.1.1 TECHNICAL SPECIFICATION OF CIRCUIT BREAKERS

1.0 SCOPE:

The scope of this bid covers, design manufacturing and supply of euipment as per Section-I Volume-II. The bidder mentioned in this Section of the Technical !id means"#riginal $uipment %anufacturer &#$%'(. The purchaser means the )%PPT*+(.

In case bidder is not #$%, sole responsibility of offering euipments/material of manufacturer as per this bid reuirement shall rest on the bidder.

2.0 STANDARDS:

2.1 pplicable Standards for the offered euipments/items shall be as per Section-I

Volume-II.

2.2 If the euipment offered by !idders conforms to any other standards, salient points of comparison beteen the standards adopted and the specific standards shall be clearlybrought out in relevant schedule of technical deviation. It ill be sole responsibility of !iddersto prove that the salient features of offered euipment are euivalent or better than IS.

2.3 ACCEPTANCE OF OTHER AUTHORITATIVE STANDARDS:

In the preceding paragraph relevant Indian standard /I$* standard bid have beenshon. oever, the euipment meeting any other authoritative international standard, hichensures eual or better uality than the standards, mentioned shall also be acceptable.$uipment for hich Indian Standards are not available, the relevant !ritish standards andI$* recommendations ill be applicable. Please attach photocopy of all such standardsaccording to hich the euipment has been offered.

2.4 TYPE TESTS:

*ircuit !reaers should be suitable to close and open successfully for specified idleline charging current ithout developing dangerous over voltages. ll offered circuit breaersshould be fully type tested as per the relevant standards. In case the euipment of the typeand design offered, has already been type tested, !idders shall invariably furnish type testreports from the reputed and approved national/international laboratory/0overnmentapproved test houses to prove that bids of *ircuit breaers offered conform to the relevantstandard. Test certificates shall clearly indicate the type and model number etc., so that

relevant details of offered circuit breaers could be verified. 1hile submitting offers the modeland type etc., shall be clearly indicated. Type test reports so furnished should not pertain tothe period earlier than five years from the date of opening of !id. !idders have to submit onecomplete set of Type Test reports for the offered circuit breaers for the folloing tests:

2I*/%PPT*+/T3-454 to 456 *ircuit !reaers1

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Seismic ithstand test on the complete euipment shall be carried out along ith thesupporting structure etc. Seismic level specified shall be applied at the base of the structure.The accelerometers shall be provided at the terminal pad of the euipment. Seismic test shallbe carried out in all possible combination of the euipments.

Non-!"#$$on o% &'(')*n+ +,' +'+ &'o&+ %o& +' "&'*/'& o%%'&' ",

+' B$'& *(( "' +&'*+' * $!*($%$*+$on.

2. DISCREPANCY IN TECHNICAL PARTICULARS:

3egarding discrepancy in technical particulars stipulation under Section-I Volume-IIshall be applicable.

3.0 SYSTE CONDITIONS:

3.1 pplicable climatic conditions shall be as per Section-I Volume-II.

3.2 AU5ILIARY PO6ER SUPPLY:

u7iliary Poer Supply for offered $V euipments shall be as per Section-I

Volume-II.

4.0 DUTY RE7UIREENT

4.1 *ircuit breaers shall be totally restrie free under all duty conditions and shall be

capable of performing specified duties.

4.2 *ircuit breaers shall meet the duty reuirements for all type of phase to phase and

2I*/%PPT*+/T3-454 to 456 *ircuit !reaers

S.NO. TYPE TESTS REPORTS TO BE FURNISHED BY BIDDERS

4 %echanical #peration Test &%echanical endurance test'8 Temperature rise test

9

ielectric tests&ielectric properties should be tested ith the closing resistor'a' +ighting impulse voltage ithstand test

b' Poer freuency voltage ithstand testc' Sitching impulse voltage ithstand test &et'&for ;55<V *!'

; Poer freuency voltage ithstand test.

= %aing and breaing capacity test

> !asic short circuit test &duties for terminal faults'

6 *ritical *urrent Test

? Short line fault test@ Short time current test

45 $volving Aault Test44 #ut of phase breaing test

48 Idle +ine charging current breaing tests:49 Seismic ithstand test:

4; *orona inception and e7tinction voltage test &for ;55 <V !reaers only'4= *apacitor current sitching test

4> Shunt reactor current-sitching test

46 IP == test on marshalling bo7

2

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ground fault, irrespective of fault location. !reaers shall also meet idle line charging and

dropping hen used on an effectively grounded system and perform mae and brea

operations as per stipulated duty cycles satisfactorily.

4.3 C$&!$+ "&'*/'& *(( "' **"(' o% %o((o8$n9 !+, &'!$&'#'n+ * #'n+$on'

$n A'n$-A1 ;P&$n$*( P*&*#'+'&;:

i. Interrupting the steady and transient magnetiBing inrush current of poer transformer.

ii. Interrupting line charging current.iii. *learing short line faults &ilometric faults' ith source impedance

behind the bus euivalent to symmetrical fault current specified.iv. !reaing inductive currents of upto 45 mp.v. #ut of phase breaing capacity.

vi. Various voltage class circuit breaers should be capable for capacitor sitching as per I$*.

4.4 !reaers shall satisfactorily ithstand high stresses imposed during fault clearing,load reCection and re-energisation of lines ith trapped charges. !reaers shall also

ithstand the voltage specified in ppendi7-4 (Principal Parameters(:

.0 <ENERAL TECHNICAL RE7UIREENTS OF CIRCUIT BREAKERS:

.1 $7posed live parts shall be placed high enough above ground to meet the

reuirement of local safety codes.

.2 ny part of the breaer, especially the removable ones, shall be freelyinterchangeable ithout the necessity of any modification at site.

.3 *omplete circuit breaer ith all the necessary items for successful operation shall

be supplied.

.4 *ircuit breaers shall be suitable for hot line ashing.

. ll breaers shall be supplied ith 4 set &> nos.' terminal connectors. etails of

terminal connector reuired ith each circuit breaer are given in clause 4?.5 hereunder and

the !idders are reuired to note that the terminal connectors shall form a part of scope of

supply.

.= *urrent density adopted for the design of the terminal pads shall in no case e7ceed

the folloing values:i. Aor copper pads - 4.> mp/s.mm.

ii. Aor others - 4.5 mp/s.mm.

.> Provisions shall be made for attaching operation analyBer after installation at site to

record contact travel D speed and for maing measurement of operation timings,

synchroniBation of contacts of all poles.


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=.0 CONTACTS:

=.1 %ain contacts shall have ample area and contact pressure for carrying rated current

continuously and also the short time rated current of !reaers ithout e7cessive

temperature rise, hich may cause their pitting or elding. *ontacts shall be adCustable to

allo for ear, easily replaceable and shall have a minimum of moveable parts andadCustments to accomplish desired results.

=.2 ll e7ternal and internal mae and brea contacts shall be sealed and shall be free

from atmospheric effects. *ontacts shall be designed to have adeuate thermal and current

carrying capacity for the duty specified and to have long life e7pectancy so that freuent

replacement due to e7cessive burning is minimiBed. Provision shall be made for rapid

dissipation of heat generated by the arc on opening.

=.3 %ain contacts shall be first to open and last to close to minimiBe contact burning andear.

=.4 ny device provided for voltage grading to damp oscillations or to prevent restrieprior to the complete interruption of *ircuit or to limit over voltages on closing shall have a

life e7pectancy compatible to that of !reaers as a hole.

=. !reaers shall be so designed that hen operated ithin their specified rating,

temperature of each part ill be limited to values consistent ith a long life of the material

used. The temperature shall not e7ceed that indicated in I$*-=> under specified ambient

conditions.

>.0 PORCELAIN HOUSIN<:

>.1 Porcelain housing shall be of single piece construction ithout any Coint or coupling.It shall be homogeneous, free from lamination, cavities and other flas or imperfections that

might affect high mechanical and dielectric strength and shall be thoroughly vitrified tough

and impervious to moisture.

>.2 0laBing of porcelain shall be uniform, bron or dar bron coloured, free from

blisters, burns and similar other defects ith a smooth surface arranged to shed aay

rainater or condensed ater particles &fog'.

>.3 ousing shall be designed to have ample insulation, mechanical strength and rigidity

for satisfactory operation for the conditions under hich they ill be used. ll housing of

identical ratings shall be interchangeable.

>.4 Puncture strength of housing shall be greater than the dry flashover value. 1hen

operating at normal rated voltage there shall be no electric discharge beteen the

conductors and housing hich ould cause corrosion or inCury to conductors, insulators or

supports by the formation of substance produced by electro-chemical action. These housing

hen operating at the normal rated voltage shall cause no radio interference/disturbance.


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>. ll iron parts shall be hot dip galvanised and all Coints shall be airtight. Surfaces of

the Coint shall be trued-up by grinding porcelain parts and by machining metal parts. ousing

design shall be such as to ensure a uniform compressive pressure on the Coints.

>.= Interrupter housing insulator and support insulator shall satisfactorily ithstand

insulation level of circuit breaer specified in ppendi7-4 EPrincipal ParametersE and shallalso be suitable for contaminated and polluted atmosphere as per relevant standard.

?.0 AU5ILIARY CONTACTS:

?.1 u7iliary sitches &contacts' reuired for satisfactory operation of *ircuit breaer

including automatic reclosing &single shot, single and 9 phases', #F/#AA indicators both in

control room and cubical sitchyard, semaphore indicators in the mimic diagram in the

control room and anti pumping feature shall be provided on each circuit breaer. ll these

au7iliary sitches and reuired relays ith their scheme shall be included in the scope of

supply.

?.2 In addition to the au7iliary sitches mentioned above, !idders shall provide as sparesten au7iliary contacts each of the Enormally-openE and Enormally-closedE types hich shalloperate ith the closing or opening of all the three poles of circuit breaers and further tenau7iliary contacts each of Enormally closedE and "normally openE type hich shall operateith each of three individual poles of circuit breaers. These spare contacts shall be utilisedfor additional safety inter-locing and other monitoring devices by the purchaser.

?.3 ll au7iliary contacts shall be placed in a eatherproof casing and current rating of thesitches shall be mentioned in the !id. Provision shall be available to convert these spareEnormally-openE contacts to Enormally-closedE type and vice versa.

?.4 u7iliary sitch of !reaers shall be preferably driven by breaer operating rod.

oever in case due to some constraint same is not possible then a plug-in device shall beprovided to simulate the opening and closing operations of circuit breaer for the purpose of testing control circuits.

?. rrangement proposed for connecting control cables to the au7iliary sitches shall beclearly stated. Provision shall be made for suitable cable glands fitted on gland plate for receiving control cables reuired for inter connecting assemblies and the au7iliary sitchesof the breaer. dditional 0land plates shall be supplied duly drilled and fitted ith cableglands. 0land plate and operating mechanism doors shall be provided ith gaset properly.These cable glands shall be suitable for armoured copper control cables. The cable glandsith suitable blaning arrangement shall be fitted on the gland plate that shall be fastenedsuitably at the bottom of each control cabinet for connecting copper control cables provided

by the purchaser.

?.=. !idders may please note that 4.4 <V grade unarmoured copper control cables shallbe used by the purchaser and, therefore, the offered cable glands shall be suitable for thesiBes of these cables as specified under ppendi7-4 EPrincipal ParametersE

?.>. T' o$+$on o% &o+*+$n9 A!. 8$+' $n #'*n$# "o o!( "' ! +*++'&' o!( no+ "' *n, $%%$!(+, $n *"(' onn'+$on *n +&*$n9 *&+$!(*& +'&#$n*(.A(( +'&#$n*( #*&/$n9 o!( "' ('*&(, )$$"(' %&o# %&on+@o!+$' +' 8$+.


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.0 TOTAL BREAK TIE:

.1 ETotal !rea TimeE as specified in ppendi7-4, EPrincipal ParametersE shall note7ceed under any circumstances for the folloing duties:

&i' Test duties 4,8,9,;,= &ith T3V' as per I$*->8864-455 /I$*=>

&ii' Short line fault +@5, +6= &ith T3V' as per I$*->8864-455 /I$*=>.2 !idders may please note that specified brea time of !reaers shall not e7ceedunder any duty conditions, variation of the trip coil voltage, pneumatic/ hydraulic pressureand SA> gas pressure etc.

10.0 OPERATIN< ECHANIS AND ASSOCIATED 7UIPENTS:

10.1 <ENERAL RE7UIREENTS:

B$'& #*, ('*' no+' +*+ "o+ (o$n9 *n +&$$n9 #'*n$# %o& *((&*+$n9 o% "&'*/'& n'' n''*&$(, "' o% &$n9 +,'. T$ $ #*n*+o&, &'!$&'#'n+.

10.1.1 $ach circuit breaer shall be designed for remote control operations from the

control room. In addition, there shall be provision for local tripping D closing operations both

by electrical D mechanical control. %echanical arrangement should be provided to facilitate

manual tripping of circuit breaer for emergency trip under emergent conditions e.g. failure

of * supply, trip coil is burnt, trip coil mechanism is defective etc., hile arc uenching

medium is healthy.

10.1.2 #perating mechanism shall be of spring type only, remotely operated by electrical

signal. %echanism shall be adeuately designed D capable of performing satisfactorily all

specified tripping and reclosing duty ithin the specified time. $ntire operating mechanism

control circuitry including electrical controls D monitoring devices and all other accessories,

as reuired, shall be housed in an outdoor type, hot dip galvanised steel enclosure. This

enclosure shall conform to the degree of protection IP-== of latest version of IS:84;6. The

enclosure shall be invariably mounted on a separate concrete plinth of 955 mm height.

oever, in case due to IP-== protection limitations. I% o'&*+$n9 #'*n$# $ #o!n+'

"'(o8 +' o(' o!$n9. $n +*+ *' $+ o!( "' o$"(' %o& +' o'&*+$n9 '&onn'(

+o #*n!*((, *&9' (o$n9 &$n9 @ #'*n$# %&o# 9&o!n (')'( $n(!$n9 ON@OFF

o'&*+$on 8$+o!+ !$n9 *n, +oo( o& o+'&8$'. Ho8')'&. !' +o *n, &'*on $%

o'&*+$n9 (*+%o&# $ *"o(!+'(, n''*&, +' *#' *(( "' ''#' +o "' $n(!'

$n o' o% !(,.

10.1.3 ll oring parts in the mechanism shall be made of corrosion resistant material.

ll bearings hich reuire greasing shall be euipped ith pressure grease fittings. !earing

pins, bolts, nuts and other parts shall be adeuately pinned or bloced to prevent loosening

or changing of adCustment ith repeated operation of the breaer.

10.1.4 esign of the operating mechanism shall be such that it shall be practically

maintenance free. 0uaranteed years of maintenance free operation, the number of full load

and full rated short circuit current breaing/operation ithout reuiring any maintenance or

overhauling, shall be clearly stated in the !id. s far as possible the need for lubricating the

operating mechanism shall be ept to the minimum and eliminated altogether, if possible.


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10.1. The operating mechanism shall be non-pumping and trip free electrically and

mechanically. latch checing sitch shall be provided on mechanically trip free mechanism

to prevent reclosing before !reaers latches have reset. There shall be no obCectionable

rebounds in the mechanism and it shall not reuire any critical adCustments at site. It shall be

rigid, positive and fast in operation. %echanism shall be such that the failure of any au7iliary

spring shall not cause false tripping or closing. #peration of the poer operated closingdevice, hen *ircuit breaer is already closed, shall not cause damage to *ircuit beaer or

endanger the operatorGs life. Provision shall be made for attaching an operation analyBer to

facilitate speed test after installation of !reaers at site. #F-#AA indicating lamps shall be

provided on the mechanism bo7.

10.1.= mechanical indicator shall be provided to sho EopenE and EcloseE position of !reaers in addition to facilitate for remote electrical indication. n operation counter shallalso be provided in the central control cabinet. %echanical indicator and operation counter shall be located in a position here it shall be visible to a man standing on the ground levelith the mechanism housing closed.

10.1.> *ircuit breaer operating mechanism shall incorporate an electrically achievedpositive acting anti-pumping feature to prevent *ircuit breaer from reclosing after an

automatic opening hen the initiating closing device is maintained in the position for closing.

Fecessary anti-pumping relay shall be included in the scope of supply.

10.1.? ll material for maing connection beteen *ircuit breaer and its local control

cabinet shall be included in the scope of supply.

10.1. ll the similar contacts of 9 pole circuit breaer shall be designed to touch or open

essentially simultaneously D in any case shall close or open ithin a period of half a cycle or

less. u7iliary circuit through resistors shall be closed in sufficient time before the main

contacts closes to ensure that the over-voltage ill be held to guarantee value under mostfavorable seuence of contact closing.

10.1.10 !idders shall furnish detailed operation and maintenance manual of the

mechanism along ith the operation manual for *ircuit beaer.

10.1.11 The mechanism shall be rated for minimum mechanical operations hich iscovered under %8 class test ith I$* >8864- 455.

10.1.12 T' *&+ o% +' CB ($/' o'&*+$n9 #'*n$# ($n/ o'&*+$n9 *&# '+.

o!( no+ "' 'o' +o *+#o'&'. I+ #'*n )*&$o! *&+ o% CB o!( "'

&o'&(, o)'&' *n o!( "' +'+' %o& IP *&' '!$)*('n+ +'+.

10.2 OTOR OPERATED SPRIN< CHAR<IN< ECHANIS:

10.2.1. Spring operated mechanism shall be complete ith motor, opening D closing springith visual indication for spring charged/ discharged condition and all necessary accessoriesto mae the mechanism a complete operating unit. $ach mechanism shall be so designedas to enable a continuous seuence of EopeningE and EclosingE operations to be obtained aslong as poer is available to the motor and at least one EopeningE and EclosingE operation


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after failure of poer supply to the motor. !reaer operation shall be independent of themotor hich shall be used solely for the purpose of compressing the closing spring. %otor rating shall be such that it reuires only about 95 seconds for charging the closing springfully. *losing action of *ircuit breaer shall compress the opening spring ready for tripping.Spring charging motor shall be * motor &Single or 9 phase * %otors are not acceptable.%echanism shall be capable of performing the rated operating duty cycle of 5-5.9 seconds-

*#-9 minutes-*#. In the event of failure of poer supply to spring charging motor, themechanism shall be capable of performing one seuence of 5-5.9 seconds -*# duty. Themechanism shall undergo olive green passivation.

10.2.2. Fo& *n!*( &$n9 *&9$n9 o'&*+$on +&o!9 o'&*+$n9 *n('. $+ $'$&' +*+ #'*n$# "o #*, "' #o!n+' *+ *'!*+' '$9+ *n 9'*& &*+$o*(( "' o o'n +*+ on' #*n +*n$n9 *+ 9&o!n (')'( $ *"(' +o #*n!*((,*&9' +' &$n9 8$+o!+ #! '%%o&+. T' *n(' *(( "' '$+'& *+ no&#*(

o'&*"(' '$9+ o& o+'&8$' * !$+*"(' 3%+ 3%+ (*+%o&# n'*&(, 4%+ "'(o8 +'#*n!*( o'&*+$n9 *n(' 8$+ %o(*"(' (*'& *(( "' &o)$' +o %*$($+*+'#*n!*( *&9$n9 o% &$n9. T' o'&*+$n9 *n(' %o& *&9$n9 +' &$n9 *(("' $n'&+' %&o# $' o% #'*n$# "o *n no+ %&o# "o++o#. T' &$n9

*&9$n9 %*$($+, *(( *)' '*' o% o'&*+$on *n +' #o)'#'n+ o% *n(' *(("' $n )'&+$*( (*n' on(,. T' B$'& o!( 'n(o' <.A. D&*8$n9 8$+ +'$& o%%'&.

10.2.3 The mechanism shall be strong, rigid positive and fast in operation. Provisionshall be made for local electrical control and local / remote selection ith enough contacts inthe cubicle of the breaer. %anual emergency local tripping arrangement shall be providedon the breaer for use in emergency during maintenance. This emergency trip is intendedfor use, shall a failure of any part of * control circuits including trip coil taes placepreventing remote electrical tripping.

10.3 OTORS:

10.3.1 %otors shall be of self ventilated type having T$A* &totally enclosed fan cooled'enclosure.

10.3.2 epending upon the capacity and loading conditions supplier shall design suitablegrease lubricated or oil lubricated bearings for above motors. !earing shall be soconstructed that the loss of grease and its creeping along ith shaft into motor housing isprevented. It shall also prevent dirt and ater from getting into the motor.

10.3.3 *ontinuous motor rating &name plate rating' shall be at least ten &45' percent above

the ma7imum load demand of the driven euipment at design duty point D the motor shall

not be overloaded at any operating point of driven euipment that ill arise in service.

10.3.4 %otors shall be capable of giving rated output ithout reduction in e7pected life spanhen operated continuously in the system having the particulars as given in principleparameters.

10.3. ll induction motors shall be suitable for full voltage direct-on-line starting. Theseshall be capable of starting and accelerating to the rated speed along ith the driveneuipment ithout e7ceeding the acceptable inding temperature even hen the supplyvoltage drops don to 6=H of the rated voltage.


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11.0 CONTROL:

11.1 *lose and trip circuits shall be designed to permit use of momentary contact sitchesand trip/neutral/close sitch.

11.2 $ach breaer pole shall be provided ith to independent trip circuits, valves and coils

or to independent trip circuits ith trip coils each connected to a different set of protectiverelays using dedicated main and duplicate * supplies. t no point mi7ing of to trip circuit

supplies shall be made. Trip coil circuits shall be suitable to trip circuit supervision in pre D

post closing conditions. Purchaser ould provide the trip circuit supervision relays. !idders

shall provide necessary terminals in the central control cabinet of *ircuit breaer for pre D

post closing trip circuit supervision.

11.3 !reaers shall normally be operated by remote electrical control. $lectrical tripping

shall be performed by shunt trip coils. oever, provisions shall also be made for local

electrical control. Aor this purpose, a local/remote selector sitch and trip/neutral/close

sitch shall be provided in !reaers central control cabinet. 3emote located push buttons

and indicating lamps shall be provided by the Purchaser.

11.4 conveniently located manual mechanical tripping lever or latch shall also be providedfor tripping !reaers and simultaneously opening the reclosing circuit.

11. Shunt trip coils shall operate correctly under all operating conditions of *ircuit breaer

up to the rated breaing capacity of *ircuit breaer and at all values of .*. supply voltage

beteen 65H and 445H of rated voltage. oever, at =5H of rated voltage, !reaers shall

be able to perform closing and opening operations. If additional elements are introduced in

the trip coil circuits, their successful operation and reliability for similar applications shall be

ensured.

11.= Aor maintenance purposes, a local manual closing device along ith a detachable

handle shall also be provided. evice should be easily operable by one man standing on the

ground. irection of rotation of handle shall be clearly mared. Suitable arrangement for

safe storage of handle shall be provided.

11.> *losing coil shall operate correctly at all values of voltage beteen ?=H and 445Hof the rated voltage of closing coil.

12.0 SURFACE FINISH PAINTIN< C <ALVANISIN<:

12.1 ll interiors and e7teriors of tans, mechanism, enclosures, cabinets and other metal parts shall be thoroughly cleaned to remove all rust, scales, corrosion, greases or other adhering foreign matter. ll steel surfaces in contact ith insulating oil, as far asaccessible shall be painted ith not less than to coats of heat resistant, oil insoluble,insulating paint.

12.2. ll ferrous metal surfaces e7posed to atmosphere shall be given to primer coatsof Binc chromate and to coats of epo7y paint ith epo7y base thinner or hot dip galvaniBedor to pacs of aliphatic polyurethane finished paint. ll metal parts not accessible for painting shall be made of corrosion resistant material. ll machine finished or bright surfaces


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shall be coated ith a suitable preventive compound and suitably rapped or otheriseprotected. ll paints shall be carefully selected to ithstand tropical heat and e7tremes of eather ithin the limits specified. Paint shall not scale off or rinle or be removed byabrasion due to normal handling. ll e7ternal paintings shall be as per shade no. >@6 of IS:=or Polyurethane paint having shade Siemens grap 3+ 6598. ll ferrous parts D steelstructure including all siBes of nuts, bolts, plain and spring ashers, support channels,

structures, etc. shall be hot dip galvaniBed or stainless steel or electro-galvanised.

13.0 EARTHIN<:

#perating mechanism housing, control cabinets, dead tans, support structure etc.shall be provided ith to separate earthing terminals suitable for connection to earth mat of substation sitchyard.

14.0 NAE AND RATIN< PLATES:

*ircuit breaer and its operating device shall be provided ith a rating plate or platesmared ith but not limited to folloing details

a' %anufacturerGs name D trade mar.b' Serial number or type designation maing it possible to get all the

relevant Information from the manufacturer.

c) Jear of manufacture.

d) 3ated nominal/highest voltage.

e) 3ated insulation level.

f) 3ated freuency.

g) 3ated normal current.

h) 3ated capacitive/inductive breaing current

i) 3ated short circuit breaing current.

j) Airst pole to clear factor.

' 3ated duration of short circuit current.

I' 3ated out of phase breaing current.

m' 3ated au7iliary d.c supply voltage of closing and opening devices.

n' 3ated pressure of compressed air / gas for operation and interruption.

o' 3ated * supply voltage of au7iliary circuits

p' %ass of circuit breaer.

' PurchaseGs order no. D date

3ating plate shall be visible in position of normal service and installation. The rating

plate shall be engraved, eather proof and corrosion proof. escription on the rating plate

should be given in Elegible $nglish lettersE.

1.0 TERINAL CONNECTORS:

1.1. Terminal connector shall conform to the latest version of IS:==>4 or euivalent

International Standard. Standard draing for terminal connectors is enclosed. *lamps shall

be designed adeuately to tae care of any bimetallic effect. Temperature at the clamp shall

not e7ceed ?5 deg *. *orona rings shall be provided at the breaer terminals to control the


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radio interference. Terminal connectors shall be tested for short circuit current capability,

temperature rise, *orona inception etc.

1.2. The design of clamp shall be to our approval. The details of current tae off as

reuired by us shall be detailed out in draing and shall be submitted along ith the bid. In

respect of the terminal connectors folloing should be ensured:-

&a' The terminal connector should be made of > luminum lloy and bypressure / gravity die cast only. Sand casted terminal connectors are notacceptable.

&b' ll castings shall be free from blo holes, surface blisters, cracs and*avities. ll sharp edges should be rounded off.

&c' Fo part of clamp shall be less than 48 mm thic.&d' The bimetallic strips / sleeve shall be 8 mm thic.&e' ll nuts, bolts D ashers shall be of ot ip 0alvanised mild steel.&f' The conductor should be tightened by si7 bolts. *onductor hold length must not

be less than 455 mm.&g' The surface of clamps to be tightened by si7 bolts should be flat in shape so

that it may be possible to open the nuts and bolts by normal flat spanners.Therefore, any type of groove in the clamp body for fi7ing of nuts should beavoided.

&h' The portion of clamp to hold the conductor should be flat and straight and notBig-Bag in construction, at both the sides, so that holding of clamp by throttlingaction of current may be avoided.

&i' Space of at least =5H of diameter of nuts should be available after the hole atboth the sides of conductor holding portion for better mechanical strength.

&C' ll current carrying parts shall be designed and manufactured to have minimumcontacts resistance.

&' The clamp for Tin %oose *S3 *onductor shall be in three pieces so thateach conductor may be tightened separately.

&I' SiBe of terminal connector for hich the clamp is designed and also ratedcurrent under site conditions shall be embossed / punched on each part of clamps e7cept hardare.

1.3 ;55<V bus shall be of uadruple )%##S$K conductor. ll circuit breaers shall beprovided ith fle7ible terminal connectors, hich shall be of e7pansion type to receive ; inchIPS tube or Tin %oose *S3 conductor and suitable for horiBontal tae off.

1=.0 FITTIN<S AND ACCESSORIES:

1=.1 Aolloing is the list of the maCor fittings and accessories to be included bymanufacturers as an integral part of euipment. Fumber and e7act location of these parts

shall be indicated in the !id.

S. No. P*&+$!(*& T,' o% C$&!$+ B&'*/'&

SF= V*!!#

4 ollo insulator columns for poles of

*ircuit !reaer

Jes Jes

8 #perating mechanism housing in accordance ith clause no.45.5 shall

complete ith


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S. No. P*&+$!(*& T,' o% C$&!$+ B&'*/'&

SF= V*!!#

a' Pistol grip circuit breaer control sitch

having trip/ normal/close position.

Jes Jes

b' Trip coils/ closing coil Jes Jes

c' Space heater euipped ith industrialgrade sitch

Jes Jes

d' *able glands Jes Jes

e' Industrial grade receiptable type 9 pin 4=

mps poer plug D socet ith sitch.

Jes Jes

f' +ocal/remote changeover sitch. Jes Jes

g' %anually operated tripping pushbutton/lever &mechanical device convenientlocated to trip all three phasessimultaneously'.

Jes Jes

h' Padlocs and duplicating eys Jes Jes

i' Terminal !oards. Jes Jes C' Spring charged discharged indicator. Jes Jes

' #peration counter. Jes Jes

l' Aacility for manual charging of spring. Jes Jes

m' Auses/%*!s as reuired for * D *

supply.

Jes Jes

n' The number of terminals provided shallbe adeuate enough to ire out all contactsand control circuits plus 85H spareterminals for onerGs use.

Jes Jes

o' %anual charging spring operating handle

for maintenance.

Jes Jes

p' u7iliary sitch Jes Jes

' %echanical #F D #AA Indicator. Jes Jes

r' *ubicle lamp ith cage D sitch. Jes Jes

s' ntipumping relay. Jes Jes

t' #ut-of-Step relay. Jes -

u' Set of > nos. terminal connector clamps Jes Jes

v' Fame D 3ating plate in accordance ithI$* incorporating year of manufacture.

Jes Jes

' amping resistors Jes -

7' Pressure 0auge for F8 Pressure - Jes

9 Portable/hand held SA> gas leaagedetector.

Jes -

; SA> 0as filling adapter Jes -

1>.0 FOUNDATION SUPPORT STRUCTURES FOR BREAKER STRUCTURES:

1>.1 S!o&+ S+&!+!&': Support structures along ith the foundation bolts reuired for

mounting the breaer shall be ithin the scope of the bidder and prices for the same shall


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be uoted inclusive of all the items of structures, hardare and accessories for mounting so

as to put circuit breaer in to service. The support structures for circuit breaers shall be

designed to maintained minimum ground clearance form the loest live terminal to breaer

structure base plate &to be fi7 on concrete plinth ' as per ppendi7-4 principal parameter of

the bid.

1>.2. Fo!n*+$on:- !idders shall furnish a draing shoing foundation plan for breaersoffered by them clearly indicating the i' ynamic upard and donard loads for hich it isdesigned ii' static load iii' total eight of breaer considered for foundation design D iv' allspacing and dimensional details alongith details of foundation bolts. %PPT*+ havestandardiBed foundation plan draing for circuit breaers. The bidders shall have to matchtheir breaer structure dimensions strictly ith this enclosed draing for respective rating of circuit breaers. The static and dynamic loading for foundation have been specified under

ppendi7-4 of this bid.

1?.0 ESSENTIAL SPARE ITES:

T' "$'& #*, ('*' no+' +*+ +' n*#' o% ''n+$*( $+'# &'!$&' %o& o'&*+$on #*$n+'n*n' o% $&!$+ "&'*/'& *)' "''n #'n+$on' $n Ann'!&'-E o%

S'+$on-I Vo(.II P*&+-I. T' &$' +o' ''n+$*( *&' $+'# #*, ('*' "' $n(!'

8$(' o%%'&$n9 +' &$' %o& $&!$+ "&'*/'& o)'&' !n'& +' */*9'.

1?.1 D'&$+$on o% E'n+$*( S*&' I+'#: The technical specification of essentialspares items mentioned in nne7ure-$ have been already described in this bid document.oever the portable SA> gas evacuating D filling trolly shall meet the folloing technicalreuirement.

* Po&+*"(' SF= <* ')*!*+$n9 %$(($n9 +&o((,: The portable SA> 0as evacuating Dfilling trolly shall consist of folloing items:

S.No. D'&$+$on S'$%$*+$on

i. igh Vacuum ith directcoupled electric motor

Vacuum having 855 +P% capacity4.8 P 8=5V =5L single phase motor

ii. Vacuum gauge 9/?( !SP direct mounting maleconnection ith counter clocisepointer movement scale to read 5 to6>5 mm of 0

iii. !all valve ia M( F! both side male thread. !allvalve material of construction either brass of S.S.

iv. *opper $lbo D T 0ood uality copper of dia 9/?( F0siBe having e7cellent braBing property.

v. *opper pipe *opper pipe ith good uality copper

vi. Pressure regulator deuate rating pressure regulator tomonitor the pressure of SA> 0as to beconnected ith SA> gas cylinder of ;5/8= <g. pressure.

vii. SA> 0as !ottle ith %S -


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operating ey

viii. igh pressure rubber hoseassembly

= %eter long high pressure holesuitable for >5 !ar pressure

i7. Transparent PV hose assembly = %eter long PV* breaded hosesuitable for 45 !ar pressure

1.0 TYPE TESTS TEST REPORTS:

1.1. ll the euipment offered, shall be fully type tested as per the relevant standards. Incase the euipment of the type and design, offered, has already been type tested, !iddersshall furnish to sets of the type test reports along ith the !id. Aor any change in thedesign/type already type tested and the design/type offered against this !id the purchaser reserves the right to demand repetition of tests ithout any e7tra cost on the first or any oneunit of any rating included in the !id. In case the euipment has not been type tested earlier,all the type tests as per relevant standards shall be carried out by the successful!idder/supplier in the presence of purchaserGs representative ithout any e7tra cost. Thetest reports submitted ith the offer shall not be older than five years, prior to the date of opening of !id for various tests indicated in *lause 8.; of this bid document.

1.2. !idders shall indicate the manufacturerGs standard routine tests. !idders shall

completely assemble and test each breaer to ensure satisfactory oring of all

components and also assembled breaers as a hole.

1.3. ll acceptance and routine tests as stipulated in the relevant standards shall be

carried out by the supplier in the presence of purchaserGs representative.

1.4. Speed curves for each breaer shall be obtained ith the help of a suitable operational

analyBer to determine !reaer contact movement during opening, closing, auto-reclosing

and trip free operation under normal as ell as limiting operating conditions &control voltage,

pneumatic pressure etc.'. Tests shall sho the speed of contacts directly at various stagesof operation, travel of contacts, opening time, closing time, shortest time beteen separation

and meeting of contacts at brea/mae operation etc. This test shall also be performed at

site for hich the necessary operation analyBer along ith necessary transducers, cables,

console, etc. shall be provided if reuired.

1.. Preliminary copy of the test results shall be supplied for approval before

dispatch/shipment of *ircuit breaers. ; copies of complete test results shall be furnished

ith *ircuit breaers. These shall include complete reports and results of the routine test

and type tests carried out on circuit breaers of identical design.

1.=. ADDITIONAL TESTS:Purchaser reserves the right for carrying out any other tests of a reasonable nature

at the ors of the supplier / laboratory or at any other recogniBed laboratory/researchinstitute in addition to the above mentioned type, acceptance and routine tests at the cost of the purchaser to satisfy that the material complies ith the intent of this bid. !idders mayplease note that Insulation 3esistance test by =<V or 45<V megger at manufacturerKs orsshall be invariably carried out on each circuit breaer to record folloing I3 values.

&a' Insulation resistance beteen top terminal to earth &for open and closed


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condition of circuit breaer' in --- %ega #hms.

&b' Insulation resistance beteen both top Terminals in open and close condition

of circuit breaer in --- %ega #hms.

&c' Insulation resistance beteen both top Terminals to earth in open and close

*ondition of circuit breaer --- %ega #hms

20.0 INSPECTION:

20.1 Purchaser shall have access at all times to the ors and all other places of

manufacture here *ircuit !reaer are being manufactured and !idders shall provide all

facilities for unrestricted inspection of the !idderGs ors, ra materials, manufacture of all

the accessories and for conducting necessary tests as detailed herein. Purchaser reserves

the right to insist for itnessing the acceptance/routine testing of the bought out items.

Supplier shall submit the routine test certificates of bought out items and ra material, at the

time of routine testing of the fully assembled breaer

20.2 Fo material shall be dispatched from its point of manufacture unless the material hasbeen satisfactorily inspected and tested. Successful !idder shall ithin 95 days of

placement of order, submit itKs of bought out accessories and the names of sub-suppliers.

20.3 !idders shall indicate the inspections and checs carried out at various stages of the

manufacture of *ircuit !reaer. *omplete record of stage inspection ould be ept by the

supplier and this record should be made available for inspection by the representative of the

Purchaser. The supplier should indicate the manufacturing programme and the Purchaser

ill have a right to depute inspecting officers during the manufacture of the euipment.

Purchaser reserves the right to carry out stage inspections at all stages, for hich advance

intimation shall be given and all necessary cooperation shall be rendered by the

manufacturer.

20.4 t the time of inspection, the supplier shall identify each and every item/accessories

of the particular *ircuit !reaer under testing. Nnless all the items are identified, the

manufacture ill not be treated as complete. Various tests stipulated in IS/I$* shall be

performed in the presence of purchaserGs engineers or hen the inspection aiver has been

given, in such a case, the testing shall be done at the manufacturerGs ors as per IS/I$*

stipulations and same should be confirmed by documentary evidence by ay of Test

*ertificate hich shall be got approved by the purchaser.

20. It is e7pected that before a *ircuit !reaer is finally offered for inspection, internal

testing of the same for various important parameters are already done. 3outine test report

for such tests shall also accompany the letter of inspection call so that the Inspecting #fficer

at the time of inspection may verify the parameters brought out in the preliminary report.

etails of all tests should be clearly brought out.

20.= In case for any reasons inspection is not completed or euipment is not found to becomplete ith all accessories as per confirmation given ith the letter of inspection call,purchaser ill reserve the right to recover the complete cost of deputation of inspectingteam to the ors of the manufacturer.


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20.> cceptance of any uantity of circuit breaer D its accessories shall in no ay relieve

the successful !idder of his responsibility for meeting all the reuirement of this bid and

shall not prevent subseuent reCection if such euipments are later found to be defective.

21.0 7UALITY ASSURANCE PRO<RAE:

21.1 !idders must establish that a proper uality assurance program is being folloed by

them for manufacture of circuit breaers. In order to ensure this, suitable OP should form a

part of the technical !id, hich ill be submitted against this !id. Ouality ssurance

Program must have a structure as detailed in the folloing paragraphs.

21.2 Ouality assurance and failure prevention starts ith careful study and scrutiny of our technical bids and reuirements. Supplier shall carefully study all the technical parametersand other particulars D the supplier shall categorically give his confirmation that thesereuirements shall be met in a satisfactory manner.

21.3 Supplier shall furnish the checs e7ercised in design calculations. The salient

features of design ill have to be made available to the Purchaser.

21.4 Supplier shall indicate the various sources of the items being procured. The type of

checs, uantum of checs and acceptance norms shall be intimated and random test and

chec results should be made available for inspection henever so desired. Vendor list for

various bought out items shall be submitted ith the !id and the same shall be subCect to

purchaserGs approval. oever, no change in vendor list shall be acceptable after placement

of order and list of vendors shall be freeBe at the time of placement of order.

22.0 DOCUENTATION:

22.1 LIST OF DRA6IN<S AND DOCUENTS:

!idders shall furnish four sets of relevant descriptive and illustrative published

literature pamphlets and the folloing draings for preliminary study, along ith the !id.

&a' 0eneral outline draings shoing dimensions and shipping eights, uantity of insulating media, air receiver capacity etc.

&b' Sectional vies shoing the general constructional features of *ircuit breaer

including operating mechanism, arcing chambers, contacts ith lifting

dimensions for maintenance.

&c' ll draings D data typical and recommended schematic diagram for controlSupervision D reclosing shall be annotated in $nglish.

&d' Schematic diagrams of breaer offered for control supervision and reclosing.

&e' Structural draing, design calculations and loading data for support structures.

&f' Short circuit oscilleogram D certificates for similar type tested breaers.

0eneral arrangement of foundation and structure mounting plan including

eights of varnish components and impact loading data for foundation design.

&g' Type test reports.


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22.2 Successful !idder shall, ithin to ees of placement of order, submit four sets of final version of all the above draings for purchaserGs approval. Purchaser shallcommunicate his comments/approval on the draings to the supplier ithin to ees.Supplier shall, if necessary, modify the draings and resubmit four copies of the modifieddraings for purchaserGs approval ithin to ees from the date of comments. fter receiptof purchaserGs approval, the supplier shall, ithin three ees, submit to prints of approved

draings and to sets of good uality reproducible of the approved draings for purchaserGsuse.

22.3 Successful !idder shall also furnish to sets each of bound manuals coveringerection, commissioning, operation and maintenance instructions and all relevantinformation and draings pertaining to the main euipment as ell as au7iliary devicesalongith each breaer. %ared erection draings shall identify the component parts of theeuipment as shipped to enable erection by purchaserGs on personnel. $ach manual shallalso contain one set of all the approved draings, type test reports as ell as acceptancereports of the corresponding consignment dispatched. Similar bound manuals for breaersshall be made available to the office of $&TDP' on one per breaer basis.

%anufacturing of euipments shall be strictly in accordance ith the approved draings andno deviation shall be permitted ithout the ritten approval of the purchaser.

22.4 pproval of draings/or by the purchaser shall not relieve !idders of any of his

responsibility and liability for ensuring correctness and correct interpretation of the draings

for meeting the reuirements of the latest revision of the applicable standards rules and

codes of practices. $uipment shall conform in all respects to high standards of engineering,

design, ormanship and latest revisions of relevant standards at the time of supply and

purchaser reserves the right to reCect any or or materials hich, in his Cudgment, is not in

full accordance thereith.

22. dditional data to be furnished along ith the !id:&a' raing, shoing contacts in close, arc initiation, full arcing,

arc e7tinction and open position.

&b' Temperature v/s pressure curves for each setting of density monitor along ith

details of density monitor.

&c' %ethod of checing the healthiness of voltage distribution devices &condensers'

provided across the breas at site.

&d' ata on capabilities of circuit breaers in terms of time and number of

operations at duties ranging from 455H fault currents to load currents of the

loest possible value ithout reuiring any maintenance or checs.

&e' $ffect of non-simultaneity beteen contacts ithin a pole or beteen poles and

also ho it is covered in the guaranteed total brea time.

&f' Sectional vie of non return couplings if used for SA> pipes.&g' etails and type of filters used in interrupter assembly and also operating

e7perience ith such filters&h' etails of SA> gas:

i) Test methods used in controlling the uality of gas used in *ircuit beaers

particularly purity and moisture content.

ii' Proposed tests to assess the conditions of SA> ithin a circuit breaer after a

period of service particularly ith regard to moisture contents in the gas.


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iii' Precise procedure to be adopted by maintenance personnel for handling

euipment ho are e7posed to the products of arcing in SA> gas so as to

ensure that they are not affected by possible irritants of the sin and

respiratory system.

23.0 PACKIN< AND FOR6ARDIN<:

$uipment shall be paced in suitable crates in such a manner to protect it fromdamage and ithstand handling during transit. !idders shall be responsible for and maegood at his on e7pense, any or all damage to the euipment during transit. Aragilematerials shall be carefully paced and mared ith the appropriate caution symbols.1herever necessary, proper arrangement for lifting such as lifting hoos etc. shall beprovided.

$ach consignment shall be accompanied by a detailed pacing list containing thefolloing information:

&a' Fame of the consignee.

&b' etails of consignment.&c' estination.&d' Total eight of consignment.&e' Sign shoing upper/loer side of the crate.&f' andling and unpacing instructions.&g' !ill of material indicating contents of each +ot

Supplier shall ensure that the pacing list and bill of material are approved by thepurchaser before dispatch.

24.0. COPLETENESS OF E7UIPENT AND BOU<HT OUT ITES:

!idders must furnish the folloing information along ith technical !id:

24.1 *omplete details of all the accessories hich ill be supplied ith *ircuit breaer should be furnished. 1hile furnishing these details, items hich ill be manufactured by!idders and balance items, hich ill be procured from sub-suppliers should be clearlyidentified and indicated in the !id.

24.2 It is obligatory on the part of !idder to ensure that supply of all accessories alongith %ain euipment are simultaneously delivered to avoid any holdup in erection andcommissioning. The responsibility for obtaining timely supplies of bought out items ill reston !idders and only on this basis, delivery period ill be offered in the !id.

24.3 It may be noted that in case of damages/shortages due to improper pacing or anyother negligence, replenishment shall be arranged ithin one month time. Aor bought outitems, responsibility for guarantee and obtaining immediate replacement in case any defectsare noticed and also in case defective supply of any item is reported, ill rest ith the!idder. In case for attending to defects in any accessory or inspection/ replacement of theaccessory, hich may be bought out item for the !idder if services of engineer of originalmanufacturer is reuired, the same ill be organiBed on immediate basis by !idder at hiscost.


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2.0 SPECIFIC TECHNICAL RE7UIREENTS OF SF= CIRCUIT BREAKERS:

2.1 #ffered circuit breaers shall be of sulphur he7afluoride &SA>' gas filled.

2.2 C$&!$+ "&'*/'& *(( o#&$' o% +&'' $'n+$*( $n9(' o(' !n$+. T'

!+, o% $&!$+ "&'*/'& %o& )*&$o! KV (* * "''n $n$*+' $n +' P&$n$('

*&*#'+'& *n o+'& &'!$&'#'n+ %o& $&!$+ "&'*/'&; A'n$-A1 o% "$o!#'n+;. C$&!$+ B&'*/'& *(( "' o'&*+' ", &$n9 *&9' #'*n$#%o& "o+ o'n$n9 *n (o$n9. T' #'*n$# *(( "' o!' $n * !+ &oo% *n 8'*+'& &oo% on+&o( *"$n'+.

2.3 !reaer assemblies ith base, support structure for circuit breaer as ell as for

control cabinet, central control cabinet and foundation bolts for main structure as ell as

control cabinet and central control cabinet &e7cept concrete foundations', !reaer terminals

and operating mechanisms. Support structures shall be hot dip galvaniBed.

2.4 *ompressed SA> gas, in each pole ith provision of density monitor.

2. #ne central control cabinet and one control bo7 for each pole ith all the reuired

electrical devices mounted therein and the necessary terminal blocs for termination of inter

pole iring. Fecessary inter pole cables shall be in the scope of supply and the purchaser

based on the schematic, iring diagram and termination schedule to be supplied by the

!idder, shall do cabling at site.

2.= Instruments, gauges for SA> gas pressure ith suitable number of F#/F* contacts

of reuired uantity for interlocing and other formalities as per schematics.

2.> ll necessary parts to provide a complete and ready to use circuit breaer

installation such as main euipment, terminal connectors, control parts, cable connector,

pipe lines and other devices, hether specifically called for herein or not.

2.? *ircuit breaers shall be single pressure type, the design and construction of *ircuit

beaer shall be such that there is minimum possibility of gas leaage and entry of moisture.

There should not be any condensation of SA> gas on the internal insulating surface of circuit

breaer.

2. ll gaseted surfaces shall be smooth, straight and reinforced to minimiBe distortion

and to mae a tight seal. #perating rod connecting the operating mechanism to the arc

chamber &SA> media' shall have adeuate seals, single E5E ring seals ithout test holes

ouble E5E ring seals or ouble lip seals and test holes for leaage test of the internal seal

shall be provided on each static Coint. suitable pressure-monitoring device on each polemay be provided to ensure pressure of insulating media for the entire assembly.

2.10 In the interrupter assembly there shall be an absorbing product bo7 to eliminate

mi7ing of SA> decomposition products and moisture. %aterial used in the construction of

*ircuit breaers shall be fully compatible ith SA> gas.

2.11 $ach pole shall form an enclosure filled ith SA> gas independent of to other


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poles. The SA> gas density of each pole shall be monitored and regulated by individual

density monitors.

2.12 SA> gas density monitor shall be adeuately temperature compensated. ensity

monitor shall meet the folloing reuirements:

i) It shall be possible to dismantle the density monitor for checing/ replacementithout draining the SA> gas by using suitable interloced non-returncouplings.

ii' It shall damp the pressure pulsation hile filling the gas in service so that theflicering of the pressure sitch contacts does not tae place.

iii' 0as pressure indicators should be provided for each breaer pole. Thesepressure indicators shall have uniform graduated dial.

2.13 Suitable arrangement for pressure relief shall be provided in the gas chamber of

circuit breaer to avoid the damages or distortion during occurrence of abnormal pressure

increase or shoc aves generated by internal electric fault arcs. Position of pressure relief

devices &e.g. vents, diaphragms, etc.' shall be arranged to minimiBe danger to operating

personals in the event of gas or vapour escaping under pressure.

2.14 Aacility shall also be provided to reduce the gas pressure ithin !reaers to a

value not e7ceeding ? millibars ithin ; hours or less. $ach circuit breaer shall be capable

of ithstanding this degree of vacuum ithout distortion or failure of any part.

2.1 Sufficient SA> gas shall be provided to fill all circuit breaer poles after erection. dditional 85H of the total SA> gas reuirement for each breaer shall be supplied inseparate cylinders.

2.1= Portable/hand held SA> gas leaage detector shall also be supplied along ith each

SA> breaer.

2.1> *ontacts shall be ept permanently under pressure of SA> gas. 0ap beteen the

open contacts shall be such that it can ithstand atleast the rated phase to ground voltage

continuously at Bero gauge pressure of SA> gas due to profuse and sudden leaage.

2.1? If multi brea interrupters are used, these shall be so designed and augmented, that

uniform voltage distribution is developed across breaing contacts. *alculations/test reports

in support of this reuirement shall be furnished along ith the !id. Thermal and voltage

ithstand capability of the grading element shall be adeuate for the specified duty and

service conditions.

2.1 Special contacts for use ith the trip coils and single shot reclosing operation, hich

permit the relative adCustment ith respect to the travel of *ircuit breaer, shall also be

provided.

2.20 #perating mechanism shall be suitable for high speed single/three phase tripping D

reclosing as per duty cycle indicated for various class of *!s in "Principle parameters and

other reuirement for circuit breaers( ppendi7-4.


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2.21 Should the settings of the three breaer poles not be the same &e.g. due to failure of

an operating or closing coil' all three poles shall trip simultaneously on appropriate electrical

command. n out of step relay shall be supplied ith each breaer to give a remote trip

discrepancy alarm.

2.22 non return valve should be provided so that in case of substantial pressure loss ina pole the main interrupting chambers remain pressurised and can retain their full insulating

capacity for several more hours.

2.23 %otors shall be Esuirrel cageE three phase induction motors of sufficient siBe capable

of satisfactory operation for the application and duty as reuired for driving euipment.

2.24 If arcing contacts are used they shall be first to close and the last to open. These

shall be easily accessible for inspection and replacement. If separate arcing contacts are not

mounted, in that case main contacts shall be easily accessible for inspection and

replacement. Tips of arcing contacts and main contacts shall either be made of graphite or

silver-plated or of tungsten alloy.

2.2 SULPHUR HE5AFLUORIDE <AS SF= <AS:

2.2.1 SA> gas shall comply ith latest version of I$*-96>, 96> and 96>! and shall be

suitable in all respects for use in the sitchgear under the orst operating conditions.

2.2.2 igh pressure cylinders in hich the SA> gas is shipped and stored at site shall

comply ith latest version of IS:;96@ &Identification of the contents of industrial gas

cylinders' and IS:6944 &Seamless high carbon steel cylinders for permanent and high

pressure liuefiable gases'. These gas cylinders shall also meet Indian !oiler regulations.

2.2.3 SA> gas shall be tested for purity, de point, brea don voltage, ater contents

as per latest version of I$*-96>, 96> and 96>! and test certificates shall be furnished for

each lot of SA> gas.

2.2= CONTROL CABINETS:

*. *ontrol cabinets shall be of the free standing floor mounting type.

". #perating mechanism and all accessories shall be enclosed in eather D vermin

proof mechanism cabinet of hot dip galvaniBed sheet steel construction, the thicness of

hich shall not be less than 9 mm intended for outdoor operation. *ontrol cabinets shall be

provided ith a hinged door. oor hinges shall be of union Coint type for easy access to the

mechanism at the front. Sides shall be properly braced to prevent obbling. Suitable gasetshall be provided to mae the mechanism housing aterproof and dust proof. ousing latch

shall accommodate padloc reuiring a 48mm dia hole. Padloc and duplicate eys are also

included in the scope of supply.

. !us bars shall be of tinned copper of adeuate cross-section to carry the normal

current, ithout e7ceeding the permissible temperature rise over an ambient temperature of

=5Q* outside the cubicle. !uses shall be braced to ithstand forces corresponding to short


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circuit current of 8= .

. %otors rated 4 1 and above being controlled from the control cabinet ould be

suitable for operation on a ;99 V, 9 phase =5 B system. Aractional 1 motors ould be

suitable for operation on a 895 V, 4-phase, =5 B supply system.

'. Isolating sitches shall be group operated units &9 pole for use on 9-phase supply

system and 8 pole for single phase supply systems' uic mae uic brea type, capable

of breaing safely and ithout deterioration, the rated current of the associated circuit.

*ontrol cabinet door shall be interloced ith the operating handle of the sitch so as to

prevent opening of the door hen the sitch is closed. device for bypassing the door

interloc shall also be provided. Sitch handle shall have provision for locing in both fully

open and fully closed positions.

%. Auses shall be 3* cartridge lin type having prospective current rating of not less

than ;.> &rms'. They shall be provided ith visible operation indicators to sho hen they

have operated. #ne fuse pulling handle shall be supplied for every ten fuses or a part

thereof.

9. Push button shall be rated for not less than > mps, ;99 V .*. or 8 mps, 885V *

and shall be flush mounted on the cabinet door and provided ith appropriate nameplates.

3ed, 0reen and mber indicating lamps shall be flush mounted and provided ith series

resistors to eliminate the possibility of short circuiting of control supply in the event of fusing

of lamps.

. Aor motors upto = 1, contactors shall be direct-on-line, air brea, single thro typeand shall be suitable for maing and breaing the sitching current of the associated motor hich shall be assumed eual to >.= times the full load current of the motor. Aor motors

above = 1, automatic star delta type starters shall be provided. 9 pole contactors shall befurnished for 9 phase motors and 8-pole contactors for single phase motors. 3eversingcontactors shall be provided ith electrical interlocs beteen forard and reversecontactors. If possible, mechanical interlocs shall also be provided. *ontactors shall besuitable for uninterrupted duty and shall be of duty category class *; as defined inIS:8@=@. The main contacts of the contactors shall be silver plated and the insulation classfor the coils shall be class $ or better. ropout voltage of the contactors shall not e7ceed65H of the rated voltage.

$. *ontactors shall be provided ith a three element, positive acting, ambienttemperature compensated, time lagged, hand reset type thermal overload relay ithadCustable setting alternatively %*! for motor protection. and reset button shall be flushith the front door of the cabinet and suitable for resetting ith starter compartment door closed. 3elays shall be either directly connected or *T operated depending on the ratedmotor current.

G. Single phasing prevention relay shall be provided for 9 phase motors to provide

protection against single phasing.

/. %ini starters shall be provided ith no volt coils henever reuired.


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(. PurchaserGs poer cables ill be of 4455/>=5 volts grade stranded aluminumconductor. PV* insulated, PV* sheathed single steel ire armoured and PV* Caceted. llnecessary cable terminating accessories such as glands, crimp type tinned copper lugs etc.for poer as ell as control cables shall be included in !idderGs scope of supply. 3euisitenumber of suitable brass cable glands shall be provided for cable entry at the bottom of theoperating cabinet to receive purchaserGs control cables. These shall be mounted in

accessible position and floor level so that the cable Coints can be made easily. *able glandsshall be double compression type.

G. Separate terminal blocs shall be provided in the mechanism housing for terminating circuits of various voltage classes. Terminals for * D * shall be providedseparately and isolated from each other. *T loads shall be terminated on a separate blocand shall have provision for short circuiting the *T secondary terminals. Terminals for thecontrol D other circuits shall be suitable for accommodating 9mm stranded conductor cableleads. minimum of si7 spare terminals for control iring shall be provided. ousing shallbe complete ith all necessary iring in the housing.

/. 1iring for all control circuits shall be carried out ith 4455/>=5 volts grade PV*

insulated tinned copper stranded conductors of siBes not smaller than 8.= mm. tleast 85Hspare terminal blocs for control ire terminations shall be provided on each panel. ll

terminals shall be provided ith ferrules indelibly mared or numbered and these

identifications shall correspond to the designations on the relevant iring diagrams.

Terminals shall be rated for adeuate capacity hich shall not be less than 45 mps.

(. *ontrol cabinet shall be provided ith 895 V, 4-phase =5 B, 85 1 fluorescent light

fi7ture and a suitably rated 895V, 4 phase, = amps, 9 pin socet for hand lamps. Suitably

rated poer plug ith sitches shall be provided to enable the control supply to !reaers to

be cut off from the mechanism housing.

#. Suitable strip heaters shall be provided inside each cabinet complete iththermostat to prevent moisture condensation. eaters shall be controlled by suitably rateddouble-pole miniature *ircuit !reaers and by differential thermostat so that the cubicletemperature is alays maintained appro7imately 45 deg./ above the outside air temperature.#n-#ff sitch and fuse shall be provided. eater shall be suitable for 895 volts * supplyunless otherise specified.

n. Signal lamps provided shall be of neon scre type ith series resistors, enclosed inbaelite body. $ach signal lamp shall be provided ith a fuse integrally mounted in the lampbody.

o. $lectric measuring instruments shall be of moving iron type mmeters for measuringcurrent up to 95 mps shall be directly connected hile those for measuring above 95 mpsshall be connected through suitable *Ts mmeters shall be provided ith selector sitches.

. Voltmeters shall be protected by 3* fuses and provided ith selector sitches.

. Items inside the cabinet made of organic material shall be coated ith a fungusresistant varnish.

&. ll doors, panels removable covers and breaer openings shall be gaseted allaround. ll louvers shall have screen and filters. *abinet shall be dust, moisture, and vermin


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proof.

. ll cabinets/bo7es shall be designed for the entry of cables from bottom by means of eatherproof and dust-proof connections. Suitable cable gland plate &at least 4=5 mmabove the base of cabinet/bo7' of 0 having minimum thicness of 9 mm, ith necessarycable glands shall be provided. The cable gland plate shall be re-movable type and shall

have provision for additional glands for future. The glands shall have provision for securingarmour of the cable separately and shall be provided ith earthing tag. The glands shall becadmium plated. The cabinet/bo7 shall be designed generously for clearance so as to avoidinterference beteen the iring entering from belo and any terminal bloc or accessoriesmounted ithin the bo7 or cabinet.

+. Suitable relay for monitoring of * supply voltage to the control cabinet shall beprovided. Pressure sitches used for interloc purposes shall have adeuate contact ratingsto be directly used in the closing and trip circuits. In case the contacts are not adeuatelyrated and multiplying relays are used then the interloc for closing/ opening operation shallbe independent of the relay logic i.e. if the * supply to the interloc circuit fails thenoperation locout shall tae place.

2.2> SERVICES FOR SUPERVISION OF ERECTION COISSIONIN< OFCIRCUIT BREAKERS:

2.2>.1 SERVICES FOR SUPERVISION OF ERECTION COISSIONIN<:

It is obligatory on the part of the !idder to provide "free services( of their erectionD commissioning team to supervise erection D commissioning of each *ircuit !reaer.

lthough erection ors shall be done by us, services of erection engineer illhave to be provided for supervision and guidance. It may be clarified that the breaer shallbe made ready for commissioning in all respect and services of your engineer ill bereuired for checing and final commissioning of the breaer. Formally %PPT*+ has

trained staff for erection of breaer based on guidelines, hich are to be furnished by themanufacturer. 1hile undertaing erection or the purchaser ill reuire services of supervision engineer for suitable period depending upon design of euipment and theseservices for reuired period ill have to be made available on free of cost basis. In case anymanufacturer feels that their e7perienced engineer for final supervision of erection andtesting ill need assistance of any Cunior grade supervisor also, services of the same shouldalso be provided on free of cost basis. In any case free services by ay of deputation of reuired number of personnel for sufficient period ill have to be ensured by the bidder onfree of cost basis. The intention is that the services are made available until supervision of erection D commissioning is completed. These services shall be provided for each unit. Itill be obligatory on the part of bidders to depute their erection supervisor andcommissioning engineer positively ithin one ee of telephonic intimation from %PPT*+.

2=.0 SPECIFIC TECHNICAL RE7UIREENTS OF VACUU CIRCUIT BREAKERS:

2=.1 *ircuit breaers shall comprise of three identical pole units lined together mechanically suitable for operation ith a centrally located common operating mechanismbo7 i.e. Formal uty type. Vacuum circuit breaers ith all integral parts reuired for satisfactory operation shall be supplied ith all accessories in position and complete internaliring connected and terminated in the operating mechanism housing. #ffered euipmentshall be complete in all respect.


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2=.2 Aor 99 <V circuit breaer, all contacts shall be of !utt type.

2=.3 VACUU INTERRUPTERS:

2=.3.1 esign of vacuum interrupter shall be such that it gives trouble free operation under

normal load and fault condition throughout the life of the euipment. s the efficiency of breaer depends on degree of vacuum inside the interrupter, manufacturer shall ensure thatthe same is maintained consistently during service.

2=.3.2 Insulating ceramic body of interrupter shall have high mechanical strength and itshall be capable of ithstanding high temperature ithout any significant deterioration inmechanical and electrical properties.

2=.3.3 Interrupter design shall ensure rapid deioniBation of the gap so that normal electricalstrength of the gap is restored instantaneously.

2=.3.4 Vacuum interrupters hich are used shall be so designed and augmented that an

uniform voltage distribution is developed across them. *alculation/ test reports in support of the same shall be furnished along ith the tender. Thermal and voltage ithstand values of the grading elements shall be adeuate for the service conditions and duty specified.

2=.3. %etallic bello or the other sealing arrangement should be provided at the movingcontact and should have long fatigue free life. %anufacturersK catalogue on vacuum bottle,indicating all such details shall essentially be submitted ith the tender.


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APPENDI5-A1

PRINCIPAL PARAETERS AND OTHER RE7UIREENT FORCIRCUIT BREAKERS:

The ;55, 885, 498 and 99<V *ircuit !reaers shall conform to the specific technicalreuirements mentioned hereunder:

S.No.

I+'#R'!$&'#'n+

400KV 220KV 132KV 33KV

4Fominal system voltage&<V rms ' ;55 885 498 99

8 ighest System voltage &<V rms' ;85 8;= 4;= 9>

9 3ated freuency &B.' =5 =5 =5 =5; 3ated normal current &mperes

rms'at =5Q* ambienttemperature.

8=55 8555 8555 48=5

=Type #utdoor SA>-0as

#utdoor,Vacuum

>uty 3euirements

SP3duty

SP3 duty Formal uty Formal uty

>%ounting Structure etails ot dip galvaniBed lattice steel support structure.

6 System Feutral earthing. $ffectively earthed.

? Fumber of Poles 9 9 9 9

@

Type of #peration

Suitable for single poletripping andreclosing i.e.

SP3 duty

Suitable for

single pole

tripping and

reclosing i.e.

SP3 duty

Suitable for

three pole

tripping and

closing i.e.

normal duty

Suitable forthree pole

tripping andclosing i.e.normal duty

45 %inimum clearances R &mm'a' !eteen phasesb' !eteen live parts and earthc' *entre to *entre distance

beteen phases

>555

9=55

6555

----

;=55

----

4655

----

;95

44 0round clearance from theloest live terminal to breaerstructure base plate &to be fi7edon concrete plinth'

?555 ==55 ;>55 9655

48 eight of concrete plinthprovided by purchaser &mm'

955 955 955 955

49 #perating mechanisms Spring operating mechanism ith electrical controls


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S.No.

I+'#R'!$&'#'n+

400KV 220KV 132KV 33KV

4; 3ated operating seuence

5-5.9 sec-*#-9min-*# &)5K stands for opening and "*stands for closing'

4= "Airst Pole to clear( factor 4.9 4.9 4.9 4.=

4> Type of tripping Trip free Trip free Trip free Trip free46 %a7imum closing time not

e7ceeding &milli-seconds'4>5 ms 4=5 ms 495 ms ?5 ms

4? %a7imum total brea time &milliseconds'

>5 ms >5 ms >5 ms >5 ms

4@ *ircuit breaer opening time ;5 ms ;5 ms ;5 ms ;5 ms

85 Insulation level of breaer-a' 4.8 / =5 micro second lightningimpulse ithstand voltage &VP'

4;8= 45=5 >=5 465

b' 8=5 / 8=55 micro second

sitching ithstand voltage &VP'45=5 - - -

c' #ne minute poer freuencyithstand voltage &Vrms'

i. cross earthii. !eteen terminals

=85>45

;>5 -

865-

65-

84 %a7imum radio interference

voltage at 8>> V rms line to

ground voltage &both in close

and open condition' &micro volt'

4555 4555 4555 -

88 3ated breaing current capacity:

i. +ine charging at ratedvoltage at @5 deg. +eading

poer factor &This should be

possible ith temporary over

voltage as high as 4.= PN

ithout restrie' &mp'

>55 8?5 8=5 -

ii. 3ated small inductive current

ithout sitching o/v e7ceeding

8.9 p.u &mp'

5 to 45 5-45 5-45 -

iii. 3ated Short circuit breaing

current &* component' <ilo mp' ;5;5 ;5 8=

iv. #ut of phase breaing current

capacity <ilo mp45 45 45 >.8=

89 3eactor loaded transformer-

interrupting capacity.!idder may state +imiting values, if applicable.

8; 3ated short circuit maing

current capacity ' &<ilo mp'455 455 6@ >8.=


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S.No.

I+'#R'!$&'#'n+

400KV 220KV 132KV 33KV

8= Poer mer duty reuirement94= %V

94= D

4>5%V

4>5 D>9%V

>9%V &%a7

8> Permissible limit of temperature

rise s per table given in nne7ure-I

86 %a7imum acceptable difference

in the instance of

closing/opening of contacts:

i. 1ithin a pole &milli-second'

8.= = = =

ii. !eteen poles &milli-second' 9.9 45 45 45

8? Total creepage distance of

support insulator &mm'45=55 >48= 9>8= @55

8@ Short time current carrying

capability for three seconds &<ilo mp'

;5 < ;5 < ;5 < 8= <

95 !reaing capacity of au7iliary

contacts

45 mp *

ith *ircuit

time constant

less than 85

ms

45 mp *

ith *ircuit

time

constant

less than 85

ms

45 mp &1ithcircuit time

constant lessthan 85 ms'

45 mp *ith circuit

time constanless than 85

ms'

94 %a7imum Foise level at base

and upto =5 meters &d!'4;5 4;5 4;5 4;5

98 3ated line charging current

breaing capacity &mps' ;55 - - -

99 Trip coil and closing coil voltage885 V *

885/

445V*445V * 445V *

9; Fo. of openings circuit breaer iscapable of performing ithoutinspection, replacement andmaintenance

i. at Fo loadii. at =5H of rated currentiii. at 455H of rated currentiv. at =5H of breaing current

v. at 455H of breaingcapacity

- - -

455554555545555455

95

9= 3ated single shunt capacitor ban,breaing current at 9><V Voltagein line ith I$* >8864-455. &4 7 8;%V3 *apacitor !an'

- - ;55 mps &rms

9> Terminal *onnector

a. *onnection ; inch IPS Tin Lebra Tin Lebra Tin Lebra


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S.No.

I+'#R'!$&'#'n+

400KV 220KV 132KV 33KV

tube

b. Type $7pansiontype to

receive ; inchIPS tube

Suitable to

receive TinLebra *S3

Suitable to


Suitable to


* Ouantity > Fos. > Fos. > Fos. > Fos.

d. rrangement

suitable for horiBontaltae off

both vertical

as ell as

horiBontal

tae off

both verticalas ell ashoriBontaltae off

both vertical aell as

horiBontal taeoff

96 *ontrol cable for *!s

a ; *ore 7 8.=s.mm &4=mm dia'

??

? 8b ? *ore 7 8.=s.mm &4@mm dia' ; ; ; 8

c 48 *ore 7 8.=s.mm &88mm dia' 8 8 8 4

d 4@ *ore 7 8.=s.mm &8=mm dia' 8 8 8 8

9? uto reclosing !reaer shall be suitablefor single phase and 9phase high speed auto

reclosing

F F

9@ Static and dynamic load onfoundation

-

a. Static load &in <g'!idder may

state

loading

9555 4=55 @55

b. ynamic load&i' Npard &in <g'&ii' on ard &in <g'

4=558855

85558555

=55=55

;5. raing 3eference

a. Aor Aoundation

-

2I*/%PPT*+/T3-454

T# 456/885<V *!Aoundation

2I*/%PPT*+/T3-454 T#

456/ 498<V *!Aoundation

2I*/%PPT*+T3-454 T# 456

99<V *!Aoundation

b. Aor Terminal *onnector - 2I*/%PPT*+/T3-454 T# 456/ Terminal*onnector


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APPENDI5-A2

LIITS OF TEPERATURE RISE

Temperature rise and ma7imum temperature attained by on any part of euipment

hen in service at site under continuous full load conditions and e7posed continuously to

the direct rays of the sun shall not e7ceed the ma7imum temperature rise specified belounder conditions specified in test clauses. Permissible temperature rise indicated is for a

ma7imum ambient temperature of =5Q*. If ma7imum ambient temperature rises, permissible

values shall be reduced accordingly.

S.No.

N*+!&' o% +' P*&+ o& o% +' ($!$

*$#!# V*(!' o%

T'#.R$' $n +'#. *+

*. *#"$'n+ *$& +'#.no+ '''$n9 0'9 C

4 *ontacts in air, silver-faced copper, copper alloyor aluminum alloy &see notes &i' and&ii' '

45= ==

!are copper or tinned aluminum alloy 6= 8=8 *ontacts in oil:

Silver-faced copper, copper alloy oraluminum alloy&see note ii'

@5 ;5

!are copper or tinned aluminum alloy ?5 95

9 Terminals to be connected to e7ternalconductors by scres or bolts silver faced &seenote iii'

45= ==

; %etal parts acting as springs &See note iv'

=. '+*( *&+ $n on+*+ 8$+ $n!(*+$on o% +' %o((o8$n9 (*':

a' *lass J : &for non-impregnated materials' @5 ;5

b' *lass : &for materials immersed in oil orimpregnated'

455 =5

c' *lass $: in airin oil

485 65

455 =5d' *lass !: in air

in oil495 ?5

455 =5

e' *lass A: in airin oil

4== 45=

455 =5

f' #il base $namelSynthetic $namel in air

Synthetic $namel in oil

455 =5

485 65

455 =5

> ny part of metal or of insulating material incontact ith oil, e7cept contacts

455 =5

6 #il @5 ;5

No+':i) 1hen applying temperature rise of ==Q*, care should be taen to ensure that no

damage is caused to the surrounding insulating materials.


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ii' Ouality of the silver facing shall be such that a layer of silver remains at the points of

contact after the mechanical endurance test. #therise, contacts shall be regarded as

EbareE.

iii' Values of temperature and temperature rise are valid hether or not conductor connected

to the terminals is silver-faced.

iv' Temperature shall not reach a value here the elasticity of the material is impaired. Aor

pure copper, this implies a temperature limit of 6=5*.


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APPENDI5-B

DRA6IN<S

S.No.

D&*8$n9 No. D'&$+$on

4 2I*/%PPT*+/T3-454 T# 456/ 885<V*! A#NFTI#F

Aoundation raing for 885<VSA> *ircuit !reaer

8 2I*/%PPT*+/T3-454 T# 456/ 498<V*! A#NFTI#F

Aoundation raing for 498<VSA> *ircuit !reaer

9 2I*/%PPT*+/T3-454 T# 456/ 99<V*! A#NFTI#F

Aoundation raing for 99<VV*!.

; 2I*/%PPT*+/T3-454 T# 456/T$3%IF+ *#FF$*T#3

raing for Terminal connector for 885/498/99 <V *!


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3 , 1 I F 0

F N % ! $ 3 : -

2 I * , / % P P T * + / T 3 - 4

5 4 T # 4 5 6 / 8 8 5

< V * ! A # N F , T I # F

# A P # + $ # A * .

! .

4 4

+ *

+ *

+ *

S T , F , 3 * I V I + A # N F , T I # F P + , F

A # 3 8 8 5 < V S A > * I 3 * N I T ! 3 $ , < $ 3 & S P 3 ' N T J

; = 5 5

; = 5 5

> = 5

* + # A A $ $ : $ 3 1 , J

* +

+ # A P # + $ # A * .

! .

*

4 = 5 4 = 5 6 5 5 $ $ P P # * < $ T

A # 3 % . 9 >

A # N F , T I # F ! # + T

4 ; 5 5

4 5 5 5

855855

98=

98=

9=59559=5

4;55

4 5 U V 8 5 5 * / * ! # T 1 , J S

? U V 8 5 5 * / * ! # T 1 , J S

1 $ + + * # % P , * T $ A I + + I F 0

P * * 4 : = : ?

? U 4 ; F # S .

= 5 % % T < . P

* * 4 : 8 : ;

> I , .

V 4 @ 5 * / * & 8 T I $ S / S $ T '

8

8

4 ; 5 5

?54455

=554=5

S $ * . 4 - 4

S $ * . 8 - 8

J +

J +

? U 4 ; F # S .

S T P > I , .

8 5 5 * / *

& 8 T I $ S / S $ T '

9 = 5

4555


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+ # A A $ $ $ 3 1 , J

*

ST,F,3 *IVI+ A#NF,TI#F P+,F

A#3498 <V SA> *I3*NIT !3$,<$3 &F#3%,+ NTJ' TJP$

A#NF,TI#F P+,F

4 4 5 5

6 5 5

4555 4555 8554555855

4555

4555

9;55

4 =5 8 =5 8 55 8 =5 4 =5

8?58?5

8 ; 5

5

; 5 5

? 5

4 ; 5

? 5

8 5 5

8 5 5

4 4 5 5

4 4P#*<$T 8=5?5;55 $$P

J,3+$V$+J,3+$V$+

8 8

8 5 5

? 5

,F*#3 !#+T %-8;

P#*<$T8=57?57;55$$P

8 5 m m 0 3 # N T

N P T # A I 3 % S # I +

! N T F # T + $ S S T $ F 4 8 5 5

9 5 5

P * * 4 := : ?

9;55

?U 855 */*!#T 1,JS

,T !#T A,*$S.

S$*TI#F 4-4

48 F#S 48U

3IF0S>I,

855 */*

&9TI$S /S$T'

6 5 5

3IF0S > I,

855*/*

&9 TI$S /S$T'

4555

48 F#S48U

S$*TI#F 8-8

3,1IF0 FN%!$3 :-

2I*,/%PPT*+/T3-454 T# 456/498<V *!

A#NF,TI#F


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A#NF,TI#F P+,F

; 5 5

4 5 5 5

4 ; 5 5

;55

9 5 5

;55

9 5 5

955 955

;F#S. 48U

STP.>I,.4@5 */*

4;?5

4??5

4 4

88

*.* 4:=:?

;F#S. 48U

STP>I,. 4@5*/*

>55 >55

4??5

S$*TI#F4-4

? 5

N P T # T $ A I 3 % S # I +

% I F I % N % 4 5 5 5

9 = 5

= > 5

P#*<$T855855955

$,3TAI++IF0

;F #S ?U 8F #S ?U

STP.?U 855*/*

A#NF,TI#F!#+T%-85 &;F#S'

J +J + J +

J+J + J +

$,3TAI++IF0

9 = 5

% I F I % N % 4 5 5 5

N

P T # T $ A I 3 % S # I +

? 5

S$*TI#F8-8

4??5

ST,F,3 A#NF,TI#F P+ ,F A#3

99 <V V,*NN% *I3*NIT !3$,<$3

;55

955

;55

;F#S?U

STP?U 855* /*

8F#S ?U

*.* 4:=:?

3,1IF0 FN%!$3:-

2I*,/%PPT*+/T3-454T#456/99<V*!

A#NF,TI#F


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SCHEDULE-I A

DESCRIPTION OF E7UIPENT FOR SCHEDULE FOR RATES PRICESTO BE FURNISHED IN BIDDIN< FOR OF SECTION-IV VOLUE-I

S.No. P*&+$!(*& o% '!$#'n+@ I+'# 7+,

A 400/V SF= C$&!$+ B&'*/'&

A ' & A n n ' : ! & ' - H C B S ' 2 + $ o n - I V o ( . - I I B P * & + - I

4 Supply of ;55<V SA> *ircuit breaers complete ith pre- insertion resistors and allaccessories is including mounting structures, terminal connectors, gas lea detector andadapter for gas Ailling etc. conforming to all technical reuirements as described in the !iddocument including foundation bolt.

8&a' Supply of ;55<V SA> *ircuit breaers complete ithout pre-insertion resistors and allaccessories including mounting structures, terminal connectors, gas lea detector andadapter for gas Ailling etc. conforming to all technical reuirements as described in the !iddocument including foundation bolt and set of spares as per nne7ure- Section-I Vol. II,Part-I.

&b' *ost of set of spares included in 8&a' above

B 220/V SF= C$&!$+ B&'*/'&

4&a' Supply of 885<V SA> *ircuit breaers complete ith all accessories including mounting

structures, terminal connectors, gas lea detector and adapter for gas filling etc. conformingto all technical reuirements as described in the bid document including foundation bolt andset of spares as per nne7ure- Section-I Vol. II, Part-I.


C 132/V SF= C$&!$+ B&'*/'&

4&a' Supply of 885<V SA> *ircuit breaers complete ith all accessories including mountingstructures, terminal connectors, gas lea detector and adapter for gas filling etc. conformingto all technical reuirements as described in the bid document including foundation bolt andset of spares as per nne7ure- Section-I Vol. II, Part-I.


D 33KV V*!!# C$&!$+ B&'*/'&

4&a' Supply of 99<V Vacuum *ircuit !reaer complete ith all accessories including mountingstructures, terminal connectors, etc. conforming to all technical reuirements as described

in the bid document but including foundation bolts and set of spares as per nne7ure-Section-I Vol. II, Part-I.


NOTE:

1. T' *"o)' '&$+$on o% +' '!$#'n+ $ 9$)'n %o& +' !&o' o% o%%'&$n9 +' &$' *n +o

#'n+$on '&$+$on o% '!$#'n+ $n $n)o$' %o& (*$#$n9 *,#'n+.

2. T' !*n+$+, o% *"o)' '!$#'n+ * "''n #'n+$on' $n Ann'!&' C o% S'+$on-I o% Vo(.II

P*&+-I.

3. A9*$n+ +'' $+'# o#o$+' +o+*( o+ o% '!$#'n+ *(on98$+ '+ o% #*n*+o&, *&'

* '&$"' $n Ann'!&'-D S'+$on-I o% Vo(.II P*&+-I *(( "' %!&n$' ", +' "$'&.

Ho8')'& %o& +' !&o' o% o#!+*+$on o% &$' )*&$*+$on +' "$'& *&' &'!'+' +o

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