C&S Electric Ltd

B-1, Site-IV, Surajpur Industrial Area, Kasna Road, Greater Noida.

Dist :- G.B. Nagar (U.P.)

Ph. No. :- 91-0120-3914500-01 Fax No. 91-0120-2341896

Website : www.cselectric.co.in

Project: TIRODA THERMAL POWER PROJECT 3300 MW (2x660 MW Phase – I + 1 x 660 MW Phase – II & 2x660 MW Phase III )

Tiroda, Gondia District, Maharashtra Owner:

ADANI POWER MAHARASHTRA LIMITED TIRORA, MAHARASHTRA

EMPLOYER : Powergen Infrastructure (L.L.C.)

CONSULTANT : FICHTNER Consulting Engineers (India) Private Limited

CONTRACTOR

:

C&S Electric Ltd. B-1, SITE-IV, SURAJPUR INDL. AREA, KASNA ROAD,

GAUTAM BUDH NAGAR (U.P.)

APML DOC.NO. : TR1-GBD-GBD-DE-I-020 Rev. 00

PROJECT DOC. TITLE : Installation, Operation and maintenance manual for 24 KV IPB

CONTRACTOR DOC. NO.: C-1000-0310-11599 Rev. 00

APPROVAL STATUS :

00 26.02.2011 VK

MB

KV Doc. for Submission

REV DATE INITIALS SIGN INITIALS SIGN INITIALS SIGN DETAILS OF REVISION

PREPARED CHECKED APPROVED

1

Project : Project : 2X600MW Phase-I+1X660 MW PHASE- II TIRODA Doc. Title : Erection & Operation Manual for 24 KV 25000A/15000A/2500A IPBD Rel. Doc. No.- TIR1- GBD –GBD- DE-I-20 C&S Doc. No. – C-1000-0310-11599

2

CONTENTS

PART NO. DESCRIPTION PAGE NO.

I DETAIL OF BUSDUCT 3

II SALIENT FEATURES OF ISOLATED PHASE BUSDUCTS 4 – 6

III FACTORY ASSEMBLY AND ROUTINE TESTS 7

IV MATERIAL RECEIPT (UNLOADING, INSPECTION & HANDLING) 8 - 9

V STORAGE 10 - 11

VI PRE-ERECTION 12

VII ERECTION 13 – 20

VIII PRE COMMISIONING 21

IX POST COMMISIONING 22 – 23

X APPROVED DRG. MDL 24

Project : Project : 2X600MW Phase-I+1X660 MW PHASE- II TIRODA Doc. Title : Erection & Operation Manual for 24 KV 25000A/15000A/2500A IPBD Rel. Doc. No.- TIR1- GBD –GBD- DE-I-20 C&S Doc. No. – C-1000-0310-11599

3

DETAIL OF BUSDUCT

SL. NO.

UNIT TYPE OF BUSCUCT

RATING (KV/Amps)

ENCLOSURE SIZE (IN MM)

BUSBAR SIZE (IN MM)

1

UN

IT #

1, 2

& 3

MAIN 24 Kv 25000A 1520 O.D. 12 THK. Al. ALLOY 1000 O.D. 14 THK. Al. ALLOY

2 DELTA 24 Kv 15000A 1070 O.D. 9 THK. Al. ALLOY 550 O.D. 14 THK. Al. ALLOY

3 TAP-OFF 24 Kv 2500A 688 O.D. 5 THK. Al. ALLOY 168.3 O.D. 11 THK. Al. ALLOY

4

II - SALIENT FEATURES OF ISOLATED PHASE BUSDUCTS

1.0 BUSDUCT

The Busduct system offered is of Isolated phase, natural cooled and continuous housing

type as elaborated in our Technical particulars and drawings.

2.0 CONDUCTORS

The Bus Conductor is in Tubular form, formed from Aluminium alloy Sheets by welding

into standard sections. Successive standard sections are joined together by means of

welding duly aligned with guide plate/backing ring inside the Conductor in one of the

sections. However for Tap-Off Busduct, extruded tubes are used as Busbar.

3.0 ENCLOSURES

The Main, Tap-Off Enclosures are made from Aluminium Alloy Sheets rolled to a

standard length. The successive standard lengths of Enclosures are joined together by

means of bonding Enclosures at site.

These bonding Enclosures in two semi circular halves are kept over the successive

section and welded circumferentially and longitudinally, thus obtaining a perfect electrical

bonding between consecutive enclosures and achieving good mechanical strength and

weather proofing. The three phase enclosures are shorted with adequate size of

Aluminium sheets/plates at the equipment ends at appropriate locations. Such an

interconnection allows the circulation of enclosure currents which sets up magnetic fields

equal in magnitude and opposite in direction to that produced by the Bus conductor.

Thus the leakage flux outside the enclosure is reduced by 95% both under normal and

fault conditions resulting in negligible heating on surrounding structures and also

reducing electromagnetic forces between phase conductors to a very large extent.

4.0 INSULATORS AND ITS ASSEMBLY

Designed for working continuously in a high ambient temperature, supporting insulators

are made up of Porcelain.

Insulators are secured on a base plate and bolted on circular spigots welded on the

enclosure. The base plate of insulators can be unscrewed and removed from outside of

5

the enclosure thereby ensuring the removal of the insulator without disassembly of the

bus.

5.0 ENCLOSURE SUPPORT

Main Enclosures are supported at the specified location by two semi-circular channel

rings bolted around the enclosure. Insulating pads are inserted between the bottom ring

and the Support beam in order to avoid circulation of current in the support structures

which are not designed for the purpose and the impedance of which is unknown.

6.0 BUS CONDUCTOR JOINTS

Adjacent busbar sections are welded circumferentially at site with the guiding

strip/backing strip inside the busbars.

7.0 TERMINATIONS

Terminations of bus conductor at Generator/ Generator Transformer, PTSP Cubicle and

UAT are done by means of Copper flexible. All the equipment end busbar connections

are made with non magnetic hardware’s to achieve an efficient joint.

On all equipments, bus enclosures are connected on the equipment by means of

Adaptor boxes. The flanges are connected with hardwares with gaskets in between the

flanges to render the Busduct dust and vermin proof.

8.0 RUBBER BELLOWS

EPDM Rubber bellows are provided near termination at Phase Side, Generator

transformer, UAT, PTSP Cubicle.

10 SUPPORT STEEL STUCTURES

All steel supporting structures supplied are Hot dip galvanised.

11 GROUNDING

The Busduct is grounded at appropriate location for which provision is made at the

enclosure end shorting for connection to station earth bus. Preferably Grounding of

Busduct enclosure shall be done at only one point. However all Support structures shall

be grounded conveniently.

6

12 PAINTING

Busbar exterior and enclosure interior are painted with Matt Black while the Enclosure

exterior is painted Epoxy based Light grey 631 of IS: 5

13 SILVER PLATING

All contact surfaces of Busbar bolted joints are silver plated to provide low resistance

and thickness of plating is 8~10 Microns.

******

7

III - FACTORY ASSEMBLY & ROUTINE TESTS

Before assembly of various busduct sections detailed study of Erection & Key drawing and other contract drawings is made to ensure no part of busduct is missed for a similar site condition. The busducts after assembly are checked thoroughly for any fouling and electrical clearances. Power frequency, High Voltage test is conducted on the entire assembly as routine tests. After completion of above tests the busducts are dismantled and each busduct length is separately kept in a casing, with a packing list. All assemblies have their erection marks clearly marked up.

----------x----------

8

IV-MATERIAL RECEIPT

UNLOADING, INSPECTION, HANDLING & STORING 1. Before beginning the unloading operation, make a thorough inspection of the

complete consignment for verification of external damage due to rough handling or unusual weather conditions or any other cause. If any damage is found or suspected, report at once, with particulars.

2. During unloading and handling operation if loose parts are found in the bottom of

equipment, preserve them for re-assembly or replace them in the respective locations.

3. Proper crane / sufficient man power shall be employed for unloading the packings

from the trucks / wagons. Under no circumstances the packings shall be rolled / pushed down from the wagons / trucks, since the same may cause damage or deformation to the housings. If the edges are damaged, gaskets and the retaining arrangement will not effectively seal the joints between the housings.

4. Handle all packages gently as the busducts may be sent partly assembled on

insulator Supports. 5. While unloading the packages, sufficient care shall be taken to avoid any damage

due to sharp crowbars or opening levers. 6. Check carefully contents of the case / crate with the packing slip kept inside the

package. 7. After inspection, all equipment’s shall be placed back in respective packages and

kept duly protected until they are removed for installation. 8. All busduct packages that are stored shall be protected from the weather. 9. All steel structures shall be stacked in systematic way for easy removal during

erection. 10. It is desirable to stock the material in such a fashion that it can be removed in the

order in which it will be installed. 11. It is desirable when storing the cases or assembly to support the busduct on their

feet and not at any intermediary point. 12. All busbar jointing bolts and washers shall be properly kept inside the cases. Do not

expose them to atmosphere. 13. All insulator shall be stored separately. Please ensure no other material is stacked

over these items under any circumstance.

9

14. All equipment termination copper braided / aluminium laminations are to be kept inside the polythene / gunny bags untill they are required for termination. Also ensure no surface scratching is done due to other materials, stack them separately.

10

V- STORAGE INSTRUCTIONS

1. All assemblies/components shall be properly packed in the original packing with

suitable polythene covers etc.

2. All packages other than busducts and steel structures must be kept in a well ventilated and covered area.

3. All small fragile item shall be stored in proper container at safe locations to avoid

any damage.

4. Identification marks or tags shall be kept for each item for easy identification.

5. All the items shall be stored in a systematic way for easy removal and to avoid any damage.

6. The heavy packages shall be stored one above the other.

7. Suitable slings shall be used to avoid impact on packages while handling.

8. The structures shall not be laid directly on ground.

9. The structures shall be stacked on wooden battens to avoid direct contact with soil

or water.

10. Ensure that galvanizing is not damaged during storage.

11. The structures shall be stored systematically for easy removal and that as far as possible they are stacked section and size-wise to facilitate easy identification and removal.

12. The hardware such as bolts and nuts, washers shall be stored in indoor and kept

size - wise in racks, preferably with a coating of protective oil , in separate compartment for easy identifications.

13. The enclosure shall be handled carefully, aluminum being softer material.

14. The busbar shall be fixed properly inside the enclosure to avoid any slippage of

busbar while handling.

15. The contact surfaces of busbars shall be protected properly.

16. The enclosures shall not be laid directly on ground but stacked on wooden battens to avoid direct contact with soil or water.

17. The enclosure ends shall be covered to avoid entry of dust and water.

18. The inspection covers shall be tightly closed to avoid any entry of water/dust

11

inside the enclosure. 19. The fragile and sensitive items such as / Seal-Off-Bushings etc. shall be stored in

indoor in well ventilated area with adequate care to prevent physical damage or dust.

20. The rubber bellows shall be stored in such a way to avoid direct contact with heat,

moisture which may cause deformation of the components.

21. The contact of products with sharp items shall be avoided.

22. All items shall be kept in original packing with proper identification tags.

23. The contact surfaces of connections and flexibles shall be well protected to avoid any damage.

24. The rubber components, gaskets busbar joining compounds etc. shall be protected

against dust grease and moisture.

25. The Copper flexibles made of braided / thin laminations shall be prevented from physical damages and protected against dust, grease and moisture.

STORAGE TYPE

1. Busduct elements outdoor 2. Flexibles, Hardwares, Cubicle, equipment etc. covered under lock & key.

12

VI - PRE-ERECTION

1. All documents especially Bill of Material, Layout drawings, erection Key diagram

for Busducts and structures shall be made available.

2. All tools and tackles shall be made available. All civil details and equipment

locations must be checked thoroughly to ensure perfect matching of busduct

sections as per field quality plan.

3. The Rubber bellows shall be in good condition and made ready for assembly /

Erection.

4. The insulators and the busbars shall be thoroughly cleaned with dry air before

and after the assembly.

5. The ends of busbars shall be smooth and free from dust, dents and paint etc.

6. The inside of enclosure shall be cleaned and free of foreign materials.

7. All surfaces that are to be bolted of busbars and earth bus etc. shall be thorougly

cleaned and free oreign materials.

*****

13

VII - ERECTION

A) GENERAL

Before the installation of busducts at site the Erection Key / Assembly Drawings shall be

studied in detail and an easy and better procedure shall be developed. If the materials

have been stored properly and correct inventory has been kept, the installation work can

proceed without the delay in searching for missing parts.

It is always preferable to begin work at one end and proceed to the other end. At this

juncture, check up whether necessary arrangements are provided at euipment terminals

for terminating busducts. Use proper tools like tirfor, pulley block, cranes etc. for lifting

the enclosures. Proper selection of pulleys (2 or 3 sheaves) with good quality manila

ropes will improve the mechanical advantage and minimize the strain to erection crew,

particularly when busducts are to be installed at high elevations.

Stringing the busducts for lifting and moving shall be done by skilled erectors and it shall

be supervised that the strings are provided properly so that the enclosures are lifted in a

balanced manner without giving chance for slip off. Check for the correctness of erection

number on the enclosure before lifting and erecting the same in the proper location. All

enclosures must be in position and alignment should be checked before proceeding with

the bolting / welding of busbars.

After the bus and support housings are in position, the insulators shall be wiped of and

all dust and foreign matter removed from inside the enclosures. During the assembly, all

the open portions of the enclosure shall be protected from the accumulation of dust or

dirt. Provision shall be made to prevent the entry of dust into the portion of the

enclosures which have been erected.

1. SUPPORT STRUCTURES

i. Check up whether all foundation for steel columns have been casted and fixing

plates have been embedded.

ii. A thorough study of supporting structure layout drawings is essential before

taking up the steel erection. It shall be ensured that all elevations are as per the

drawing and any deviation shall be brought to the notice of the customer. Under

no circumstance should the column erection commence until the elevation

matches with the approved drawings.

14

iii. After ascertaining the correct location of embedded plates, weld the studs and fill

up the gap between the embedded plate and floor with lean concrete or plaster

such that the surface is in flush with the finished floor with only studs projecting

out.

iv. Install supporting members in their respective places.

v. Verify with the drawings frequently to ensure correct installation of structures.

vi. Keep the transverse member in position and tighten them after ascertaining the

location.

vii. Avoid using twisted member. This will cause great difficulty while aligning the

enclosures.

viii. Ensure all members of structures are properly grounded.

2. ENCLOSURE

Each enclosure must be provided with two supports, one at either end. The site

assembly work should start from a fixed position. This may be either from the Generator

transformer or Generator side.

3. BUSBARS

Before proceeding with the busbar assembly, the insulators shall be thoroughly

checked for any mechanical damage during transit. Further, it is desirable to megger the

individual busduct sections before joining them together. If poor results are obtained, the

insulators are to be checked. Meggering the insulators at the initial stage avoids

replacement of insulators after the final assembly of busducts which is laborious and

time consuming.

For bolted joints in busducts, the following joining procedure should be adopted.

3.1 JOINING PROCEDURE (For Bolted joints)

i. Apply a thin film of suitable grease on the joint surface of busbar and splice plate.

Rub with steel wool on the greased joint surface. Wipe away with a clean cloth.

ii. The surface will have a silvery gleam which will contrast with the surface to the

aluminum not cleaned then apply Multipurpose grease at once , on the joint

surface(any delay should be avoided to prevent re-oxidization).The coating

should be approx. 1 mm thick and should cover the entire contact area.

15

iii. Tighten the bolts after keeping the contact surfaces correctly in

position. While tightening, ensure a generous squeeze of the grease

from the joint. If sufficient grease does not appear, disconnect and

apply additional grease and then tighten.

iv. Bolts & nuts which are supplied with spring washers shall be tightened initially with spanners and finally checked with torque wrench for the recommended values.

v. Bolt tightness Torque values:

16

17

18

19

vi. Tighten the bolts after keeping the contact surfaces correctly in position. While

tightening, ensure a generous squeeze of the grease from the joint. If sufficient

grease does not appear, disconnect and apply additional grease and then

tighten.

vii. Bolts & nuts which are supplied with spring washers shall be tightened initially

with spanners and finally checked with torque wrench for the recommended

values.

4. SPECIFIC INSTRUCTIONS :-

1) Proper tools and tackles shall be used to transporting materials.

2) The required assemblies or components alone shall be taken to erection site at

each stage of erection.

3) The fragile item shall be handled carefully.

4) The structures shall be properly tightened after alignment.

5) The lifting slings shall be put properly to avoid any distortion and ensure

temporary supports if necessary are ready before lifting the busducts.

6) Enclosure sections and rubber bellows shall be properly placed busbars shall be

checked.

7) Before making the joints the cleanness of jointing ends of busbars shall be

checked.

8) Application of contact grease is necessary for effective busbar surface contact at

bolted connection location

9) The bolts shall not be hammered but tightened fully to the required torque without

over tightening.

10) The clearances between phase and enclosures shall confirm to the design values

throughout the busducts.

11) Insulators shall be checked for any damage.

12) No foreign materials or tools shall be left inside the enclosure.

13) All inspection covers shall be properly tightened with gaskets inside and the

rubber bellows shall be connected properly.

20

14) The earthing of busducts and structures shall be done properly.

15) If transformer or Generator connections are to be done later ensure that the

enclosure ends are covered properly.

16) Painting touch up if required shall be done for entire run of busducts for good

physical appearance of the busduct assembly.

*****

21

VIII - PRE COMMISIONING

1) All pre-commissioning tests shall be conducted for busducts as per the field

quality assurance.

2) Power frequency withstand tests shall be made in the field at 75% of the values

given below:

Nominal Voltage in KV (RMS) Power Frequency withstand(1 minute

dry) in KV(RMS)

24 55

3) All joints have to be made properly tightened with correct bolt and nuts. Ensure

that no joints have been left without bolts.

4) All bolts and nuts have to be properly tightened.

5) There shall not be any bending / buckling of structure members.

6) All the structures shall be properly earthed to the station ground bus.

7) The temporary supports of busbars inside the enclosures if any shall be removed.

8) The Porcelain insulators shall be verified for breakage, chipping etc.

9) The interior of the enclosures, busbars, insulators shall be cleaned and free from

dirt, oil, grease or any deposits and moisture.

10) Ensure that no flexible laminations / Braids has come out protruding and sharp

corner is left anywhere.

11) Ensure all bolts and nuts at every flange joints and inspection covers are properly

tightened.

12) The gaskets shall be provided at every flange joints and the inspection covers.

13) Proper earthing of busducts and support structures with station earthing system

shall be done.

*****

22

IX-POST COMMISIONING

All precautions normally observed for High Tension Apparatus should be taken when

inspecting Isolated Phase Busduct and associated equipments. Housing should never be

opened unless the entire unit is shut down and the personnel working on the equipment

assure themselves that the busduct is not live.

The only reason for opening the bus housing is to clean the insulators, bushings and to

check the space heaters and to ensure if any loose contact is there in wiring. The first

time the unit is shut down, a set of inspection covers may be removed to determine the

amount of dust collected. If this is appreciable, further inspection should be made and

insulators cleaned. If the insulators are clean the interval of inspection can be

lengthened. Normally, the inspection would have to be made more often than yearly

intervals. However, the frequency of inspection should be based on local conditions.

Much longer intervals could safely be expected unless local atmosphere has a very large

amount of suspended dust.

It is recommended that during the annual maintenance for the equipment’s like

transformer etc. the busducts also should be checked for dust collection, insulation

resistance values, tightness of all bolts and nuts and spring washers etc. It is desirable to

change the busduct gaskets one in 5 years if they are found hard and brittle.

The tightness of busbar joints should be checked during this period with the help of

torque wrench. Sufficient amount of `Multiple-Purpose’ grease also should be applied at

the joining surfaces. The flexibles used at Generator, Transformers terminals should also

be checked for any abnormal temperature rise.

As already stated, the frequency of inspection should be decided based on the amount

of dust collection. Besides this, there is no need to have quarterly/half yearly

maintenance checks. But it is preferable to inspect all joints and insulators at least once

in a year.

Since the busbars are enclosed, no failure is expected. Expected failure, which may

occur, is at support insulators, either due to dust collection and condensation or due to

minor cracks. In such events, the insulators must be cleaned and the busbars to be

hipoted before commissioning. If insulators do not withstand the hi-pot, then replace

them with new ones. If the busducts are inspected and maintained periodically there can

be no chance of any failures.

23

SPECIFIC INSTRUCTIONS :-

1) Proper tools and tackles shall be used for transporting materials.

2) The required assemblies or components alone shall be taken to erection site at

each stage of erection.

3) The fragile item shall be handled carefully.

4) The structures shall properly tightened after alignment.

5) The lifting slings shall be put properly to avoid any distortion and ensure

temporary supports if necessary are ready before lifting the busducts.

6) Enclosure sections and rubber bellows shall be properly placed and busbars

checked.

7) Before making the joints the cleanness of jointing ends of busbars shall be

checked.

8) Proper application of contact grease is necessary for busbar ends before jointing.

9) The bolts shall not be hammered but tightened fully to the required torque without

over tightening.

10) The clearances between phase and enclosures shall confirm to the design values

throughout the busducts.

11) Insulators shall be checked for any damage.

12) No foreign materials or tools shall be left inside the enclosure.

13) All inspection covers shall be properly tightened with gaskets inside and the

rubber bellows shall be connected properly.

14) The earthing of busducts and structures shall be done properly.

15) If transformer connections are to be done later ensure that the enclosure ends

are covered properly.

16) Painting touch up, if required shall be done for entire run of busducts for good

physical appearance of the assembly.

*****

24

AS BUILT/APPROVED DRAWING

SL.NO.Drawings/ DOCUMENT TITLE APL DRG / DOC NO. C&S DRG / DOC NO.

C-1000-0310-11595A

18B Supporting structure arrangement for 24 KV IPB. UNIT-3 TIR1-GBD-GBD-DC-U-016B C-1000-0310-11595B

C-1000-0310-11594B

C-1000-0310-11598B

C-1000-0310-11595

Foundation & Embedment plate Locaton details for 24KV IPB supporting. Unit-2

Foundation & Embedment plate Locaton details for 24KV IPB supporting. Unit-3

19

18

Supporting structure Calculation for 24 KV IPB.

Supporting structure arrangement for 24 KV IPB. UNIT-1

18A

C-1000-0310-11599

26 Field Quality Plan for 24 KV IPB

C-1000-0310-11600TIR1-GBD-GBD-DE-X-021

C-1000-0310-11601

Test Reports of 24KV IPB

Painting procedure

27

28

WPS & PQR

TIR1-GBD-GBD-DE-X-022

TIR1-GBD-GBD-DE-X-023

C-1000-0310-11591TIR1-GBD-GBD-DE-C-012

CT wiring Diagram for 24 KV IPB

C-1000-0310-11592

Busduct connection at Unit Transformer end for 24 KV 2500A IPB

30

29

List of Sub Vendors.

Earthing Layout for 24KV IPB

25

C-1000-0310-11589

C-1000-0310-1159013

C-1000-0310-11587

Busduct connection at PTSP Cubicle end for 24 KV IPB.

Busduct connection at Generator Phase side for 24 KV 25000A IPB.

C-1000-0310-11588

3

TIR1-GBD-GBD-DE-H-002 C-1000-0310-11582

Busduct Layout for 24 KV IPB for Unit-1 TIR1-GBD-GBD-DE-D-004

1

2

4

C-1000-0310-11585

C-1000-0310-11586

7 TIR1-GBD-GBD-DE-C-005

TIR1-GBD-GBD-DE-C-006

24

20

23

TIR1-GBD-GBD-DC-D-015B

Erection Key diagram for 24 KV IPB for Unit-3

Installation, Operation and maintenance manual for 24 KV IPB.

TIR1-GBD-GBD-DC-H-017

21

Supporting structure arrangement for 24 KV IPB. UNIT-2 TIR1-GBD-GBD-DC-U-016A

17B

17

Busduct connection at Generator Transformer End for 24 KV 15000A IPB.

General Arrangement ,Wiring diagram and P & I Diagram of Pressurization Cubicle for24 KV IPB.14

15

16

Foundation & Embedment plate Locaton details for 24KV IPB supporting. Unit-1

17A

Manufacturing Quality Plan for 24 KV IPB

9

10

11

C-1000-0310-11596

12

TIR1-GBD-GBD-DC-D-015A

C-1000-0310-11593

TIR1-GBD-GBD-DC-D-015

General arrangement & Wiring Diagram of Hot Air Blower for 24KV IPB

TIR1-GBD-GBD-DE-X-025 C-1000-0310-11604

TIR1-GBD-GBD-DE-X-026 C-1000-0310-11605

General Arrangement Drawing for 24 KV, 25000A/15000A/2500A IPB. TIR1-GBD-GBD-DE-B-003 C-1000-0310-11584

C-1000-0310-11602

TIR1-GBD-GBD-DE-X-024

C-1000-0310-11597

C-1000-0310-11603

TIR1-GBD-GBD-DE-C-013

TIR1-GBD-GBD-DE-I-020

C-1000-0310-11583

TIR1-GBD-GBD-DE-F-014

C-1000-0310-11594A

TIR1-GBD-GBD-DC-U-016

C-1000-0310-11594

TIR1-GBD-GBD-DE-F-018

TIR1-GBD-GBD-DE-D-019B

C-1000-0310-11583B

MASTER DOCUMENTS / DRAWINGS LIST FOR 24 KV IPB FOR UNIT-1,2& 3 (LOT- 1 & 2)

Design Calculation for 24 KV IPB

C-1000-0310-11581Technical data Sheet for 24KV IPB

C-1000-0310-11588A

Detail drawing of wall / floor frame assembly for 24 KV IPB

Detail drawing of shorting bridge for Gen. drying Operation for 24KV IPB

Busduct connection at Ext. Transformer Cubicle end for 24 KV IPB.

TIR1-GBD-GBD-DE-J-001

TIR1-GBD-GBD-DE-C-009

TIR1-GBD-GBD-DE-C-010

TIR1-GBD-GBD-DE-C-011

6 Busduct Layout for 24 KV IPB for Unit-3 TIR1-GBD-GBD-DE-D-004B

8

C-1000-0310-11606

5 Busduct Layout for 24 KV IPB for Unit-2

31 List of Spare for IPBD TIR1-GBD-GBD-DE-X-027

TIR1-GBD-GBD-DE-D-004A C-1000-0310-11583A

TIR1-GBD-GBD-DE-C-007

TIR1-GBD-GBD-DE-C-008

22 Erection Key diagram for 24 KV IPB for Unit-2 TIR1-GBD-GBD-DE-D-019A C-1000-0310-11598A

Erection Key diagram for 24 KV IPB for Unit-1 TIR1-GBD-GBD-DE-D-019 C-1000-0310-11598