Tender ID

Kerala

AOC

Works

Electrical and Maintenance Works

Revival of Stator of Unit No 2 at SGHEP

Kerala State Electricity Board

Sabarigiri HEP | Pathanamthitta, Kerala

Amount: ₹9.7 CrCloses: 25 Apr 202510 Apr 2025Closed

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Timeline

Published27 Mar 2025
Closed25 Apr 2025
Technical Evaluation29 May 2025
Financial Evaluation11 Jul 2025
Awarded4 Aug 2025

Bids

Item Wise

4 Bids4 Aug 2025

#	Company	Amount	Rank	Status
1	Coral Rewinding India Private Limited 1₹11.3 CrAccepted-AOC 150 VILLARASAMPATTI NAAL ROAD NASIYANUR ROAD ERODE 638 107 \| ERODE \| ERODE \| TAMIL NADU \| 638107	₹11.3 Cr	1	Accepted-AOC Lowest Bidder
2	Voith Hydro Private Limited 2₹14.1 Cr+₹2.8 Cr (24.6%)Rejected-AOC A 20 21 SECTOR 59 NOIDA 201301 U P INDIA \| NOIDA \| GAUTAM BUDDHA NAGAR \| UTTAR PRADESH \| 201301	₹14.1 Cr+₹2.8 Cr (24.6%)	2	Rejected-AOC Second Lowest Bidder
3	Evans Electric Pvt. Ltd. Rejected-Technical 430 3RD FLOOR ORCHARD MALL ROYAL PALMS ESTATE AAREY MILK COLONY GOREGAON EAST MUMBAI MAHARASHTRA 400065 \| MUMBAI SUBURBAN \| MAHARASHTRA \| 400065	-	-	Rejected-Technical PQ condition not complied
4	WEG India Pvt Limited Rejected-Technical	-	-	Rejected-Technical PQ condition not complied

BoQ Comparative

Line Items (7)

Sl No	Description	Qty	Unit	Coral Rewinding India Private Limited L1	Voith Hydro Private Limited L2
1.00Part A- Supply.
1.01	Design, manufacture and supply of 180Nos.new class ‘F’ insulated VPI diamond type coils with existing coil dimensions and profile in all respect suitable for 55MW (with 10% COL at 0.9PF) loading capability. The following tests shall be carried out during the manufacturing process. i) Dimensional check ii) Coil Resistance Measurement iii) Inter strand IR value test at110VAC for 3sec as ESI Standard 44-7, June 1978 iv) Inter-turn insulation test as per IEEE522:2004 using HVHF test set v) IR value at 5KV before and after HV AC test for1minute vi) HV AC test at 27 kVfor1minute as per BS4999: Part60:1976 vii) Tan delta test at 2.2 KV, 4.4 KV, 6.6 KV, 8.8 kV and 11 KV as per ESI Std 44-7, June 1978 and IEEE Std 286-2000 viii) Partial Discharge Test as per IEEE Std 1434 ix) Voltage Endurance Test on a random sample as per IEEE Std 1043 x) Thermal Cycling Test on a random sample as per IEEEStd1310	180	Nos	5,13,00,000 ₹6,05,34,000 Lowest	6,42,35,880 ₹7,57,98,338.4
1.02	Supply of spare 20Nos new Class-F insulated VPI diamond-type coils with dimensions and profile as mentioned in item 1.01	20	Nos	57,00,000 ₹67,26,000 Lowest	71,37,320 ₹84,22,037.6
1.03	Packing the spare 20Nos. coils in standard packing with wooden boxes	1	LS	2,00,000 ₹2,36,000 Lowest	10,00,000 ₹11,80,000
1.04	Transporting the 180 Nos new VPI Insulated coils + 20 Nos. Spare VPI Insulated coils from contractor works to Power House using suitable transporting stand-200 coils	1	LS	8,00,000 ₹9,44,000 Lowest	40,00,000 ₹47,20,000
1.05	Supply complete winding kit (Class-F) for stator winding like insulation materials, wedges, packing under the wedges, mouth blocks, insulating tapes, varnish, slot side and bottom side packing, separators and brazing rods	1	LS	66,00,000 ₹77,88,000 Lowest	1,57,79,100 ₹1,86,19,338
1.06	Supply of complete winding kit (Class-F) for 20nos. Spare stator winding like insulation materials, wedges, packing under the wedges, mouth blocks, insulating tapes, varnish, slot side and bottom side packing, separators and brazing rods.	1	LS	19,50,000 ₹23,01,000	17,53,233 ₹20,68,814.94 Lowest
1.07	Supply and installation of PT-100 RTDs for temperature measurements @stator winding and core. (12+12).	24	Nos	50,400 ₹59,472 Lowest	2,27,880 ₹2,68,898.4

Corrigenda

Corrigendum

3 updatesLatest on 19 Apr 2025Submission Ends:10 Apr 202525 Apr 2025

Date changes

Download Ends10 Apr 202525 Apr 2025Submission Ends10 Apr 202525 Apr 2025Bid Opening11 Apr 202526 Apr 2025

Tender Value

₹9.7 Cr

EMD Value

₹5 L

Closing Date

25 Apr 2025, 3:00 pmClosed

Tender Inviting Organisation

Name

Chief Engineer Generation

Address

Chief Engineer Generation Moolamattom

Work Description

Design, Manufacturing, Supply, Erection , Supervision of erection, Testing and commissioning of new VPI insulated stator winding and dismantling, re varnishing and re stacking of the existing stator core of 55 MW unit No2 Generator at SGHEP

Tender Information

Tender ID

2025_KSEB_755632_1

Reference Number

CEG/AE2/SBG/06/2024-25 dated 27.03.2025

Tender Type

Open Tender

Product Category

Electrical and Maintenance Works

Form of Contract

Supply and Service

Location

Sabarigiri HEP

Source Website

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Eligibility / Pre-Qualification

Please refer Tender Documents

Documents Required

10 documents required · 10 mandatory

Fee

RequiredDetails of Tender Fee and EMD submitted (.pdf)

RequiredCopy of Bid Agreement (.pdf)

PreQual/Technical

RequiredBid document filled up,Signed and sealed in every pages of tender document (.pdf)

RequiredScanned copy of PAN card,Registration Certificate,GSTdetails, Memorandum and Article of Association (.pdf)

RequiredSolvency Certificate.Audited financial statement for thelast 3 years,Latest income tax filed. (.pdf)

RequiredProof of experience, Performance certificates with POsand WOs (.pdf)

RequiredTechnical Details,Drawings, specifications,Pamphlets,Illustrations,Descriptions,Data Sheet etc (.pdf)

RequiredGuaranteed Technical Particulars, Proof of After sales service,Company profile etc (.pdf)

RequiredAny document in proof of eligibility to participate inthe tender (.pdf)

Finance

RequiredBoQ/ Price Bid (.xls)

Fee & Financial Details

Tender Fee Amount

₹17,700

Tender Fee Exemption Allowed

Yes

EMD Fee Amount

₹5 L

EMD Fee Exemption Allowed

Yes

Important Dates

Last Activity

16 Aug 2025

Published

27 Mar 2025

Bid Opening

26 Apr 2025

Download Starts

27 Mar 2025

Download Ends

25 Apr 2025

Submission Starts

2 Apr 2025

Bill of Quantities

Item WiseBoQ_Ver3.0INR

BoQ1 (7 items)

Sl No	Description	Qty	Unit	Est. Rate	Est. Amount
1Part A- Supply.
1.01	Design, manufacture and supply of 180Nos.new class ‘F’ insulated VPI diamond type coils with existing coil dimensions and profile in all respect suitable for 55MW (with 10% COL at 0.9PF) loading capability. The following tests shall be carried out during the manufacturing process. i) Dimensional check ii) Coil Resistance Measurement iii) Inter strand IR value test at110VAC for 3sec as ESI Standard 44-7, June 1978 iv) Inter-turn insulation test as per IEEE522:2004 using HVHF test set v) IR value at 5KV before and after HV AC test for1minute vi) HV AC test at 27 kVfor1minute as per BS4999: Part60:1976 vii) Tan delta test at 2.2 KV, 4.4 KV, 6.6 KV, 8.8 kV and 11 KV as per ESI Std 44-7, June 1978 and IEEE Std 286-2000 viii) Partial Discharge Test as per IEEE Std 1434 ix) Voltage Endurance Test on a random sample as per IEEE Std 1043 x) Thermal Cycling Test on a random sample as per IEEEStd1310	-	Nos	-	-
1.02	Supply of spare 20Nos new Class-F insulated VPI diamond-type coils with dimensions and profile as mentioned in item 1.01	-	Nos	-	-
1.03	Packing the spare 20Nos. coils in standard packing with wooden boxes	-	LS	-	-
1.04	Transporting the 180 Nos new VPI Insulated coils + 20 Nos. Spare VPI Insulated coils from contractor works to Power House using suitable transporting stand-200 coils	-	LS	-	-
1.05	Supply complete winding kit (Class-F) for stator winding like insulation materials, wedges, packing under the wedges, mouth blocks, insulating tapes, varnish, slot side and bottom side packing, separators and brazing rods	-	LS	-	-
1.06	Supply of complete winding kit (Class-F) for 20nos. Spare stator winding like insulation materials, wedges, packing under the wedges, mouth blocks, insulating tapes, varnish, slot side and bottom side packing, separators and brazing rods.	-	LS	-	-
1.07	Supply and installation of PT-100 RTDs for temperature measurements @stator winding and core. (12+12).	-	Nos	-	-

Stage Documents

Stage Summary Snapshot

stage.html

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Technical Bid Opening

tech_bid_open.pdf

PDF

Technical Evaluation

tech_eval.pdf

PDF

Financial Bid Opening

fin_bid_open.pdf

PDF

boq_comp_chart.xlsx

xlsx

Financial Evaluation

fin_eval.pdf

PDF

Award of Contract

aoc.pdf

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Documents

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BOQ Documents

BOQ_1227053.xls

BOQ • 0.30 MB

Work Item Documents

166968974.pdf

Tender Documents • 0.26 MB

166968976.html

Tender Documents • 0.09 MB

167881495.pdf

Tender Documents • 1.55 MB

168609682.pdf

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Company

Coral Rewinding India Private Limited

1₹11.3 CrAccepted-AOC

150 VILLARASAMPATTI NAAL ROAD NASIYANUR ROAD ERODE 638 107 | ERODE | ERODE | TAMIL NADU | 638107

Voith Hydro Private Limited

2₹14.1 Cr+₹2.8 Cr (24.6%)Rejected-AOC

A 20 21 SECTOR 59 NOIDA 201301 U P INDIA | NOIDA | GAUTAM BUDDHA NAGAR | UTTAR PRADESH | 201301

Evans Electric Pvt. Ltd.

Rejected-Technical

430 3RD FLOOR ORCHARD MALL ROYAL PALMS ESTATE AAREY MILK COLONY GOREGAON EAST MUMBAI MAHARASHTRA 400065 | MUMBAI SUBURBAN | MAHARASHTRA | 400065

WEG India Pvt Limited

Rejected-Technical

Sl No	Description	Qty	Unit	Coral Rewinding India Private Limited L1	Voith Hydro Private Limited L2
1.00Part A- Supply.
1.01	Design, manufacture and supply of 180Nos.new class ‘F’ insulated VPI diamond type coils with existing coil dimensions and profile in all respect suitable for 55MW (with 10% COL at 0.9PF) loading capability. The following tests shall be carried out during the manufacturing process. i) Dimensional check ii) Coil Resistance Measurement iii) Inter strand IR value test at110VAC for 3sec as ESI Standard 44-7, June 1978 iv) Inter-turn insulation test as per IEEE522:2004 using HVHF test set v) IR value at 5KV before and after HV AC test for1minute vi) HV AC test at 27 kVfor1minute as per BS4999: Part60:1976 vii) Tan delta test at 2.2 KV, 4.4 KV, 6.6 KV, 8.8 kV and 11 KV as per ESI Std 44-7, June 1978 and IEEE Std 286-2000 viii) Partial Discharge Test as per IEEE Std 1434 ix) Voltage Endurance Test on a random sample as per IEEE Std 1043 x) Thermal Cycling Test on a random sample as per IEEEStd1310	180	Nos	5,13,00,000 ₹6,05,34,000 Lowest	6,42,35,880 ₹7,57,98,338.4
1.02	Supply of spare 20Nos new Class-F insulated VPI diamond-type coils with dimensions and profile as mentioned in item 1.01	20	Nos	57,00,000 ₹67,26,000 Lowest	71,37,320 ₹84,22,037.6
1.03	Packing the spare 20Nos. coils in standard packing with wooden boxes	1	LS	2,00,000 ₹2,36,000 Lowest	10,00,000 ₹11,80,000
1.04	Transporting the 180 Nos new VPI Insulated coils + 20 Nos. Spare VPI Insulated coils from contractor works to Power House using suitable transporting stand-200 coils	1	LS	8,00,000 ₹9,44,000 Lowest	40,00,000 ₹47,20,000
1.05	Supply complete winding kit (Class-F) for stator winding like insulation materials, wedges, packing under the wedges, mouth blocks, insulating tapes, varnish, slot side and bottom side packing, separators and brazing rods	1	LS	66,00,000 ₹77,88,000 Lowest	1,57,79,100 ₹1,86,19,338
1.06	Supply of complete winding kit (Class-F) for 20nos. Spare stator winding like insulation materials, wedges, packing under the wedges, mouth blocks, insulating tapes, varnish, slot side and bottom side packing, separators and brazing rods.	1	LS	19,50,000 ₹23,01,000	17,53,233 ₹20,68,814.94 Lowest
1.07	Supply and installation of PT-100 RTDs for temperature measurements @stator winding and core. (12+12).	24	Nos	50,400 ₹59,472 Lowest	2,27,880 ₹2,68,898.4

Sl No

Description

Qty

Unit

Coral Rewinding India Private Limited

Voith Hydro Private Limited

1.00Part A- Supply.

1.01

Design, manufacture and supply of 180Nos.new class ‘F’ insulated VPI diamond type coils with existing coil dimensions and profile in all respect suitable for 55MW (with 10% COL at 0.9PF) loading capability. The following tests shall be carried out during the manufacturing process. i) Dimensional check ii) Coil Resistance Measurement iii) Inter strand IR value test at110VAC for 3sec as ESI Standard 44-7, June 1978 iv) Inter-turn insulation test as per IEEE522:2004 using HVHF test set v) IR value at 5KV before and after HV AC test for1minute vi) HV AC test at 27 kVfor1minute as per BS4999: Part60:1976 vii) Tan delta test at 2.2 KV, 4.4 KV, 6.6 KV, 8.8 kV and 11 KV as per ESI Std 44-7, June 1978 and IEEE Std 286-2000 viii) Partial Discharge Test as per IEEE Std 1434 ix) Voltage Endurance Test on a random sample as per IEEE Std 1043 x) Thermal Cycling Test on a random sample as per IEEEStd1310

180

Nos

5,13,00,000

₹6,05,34,000

Lowest

6,42,35,880

₹7,57,98,338.4

1.02

Supply of spare 20Nos new Class-F insulated VPI diamond-type coils with dimensions and profile as mentioned in item 1.01

Nos

57,00,000

₹67,26,000

Lowest

71,37,320

₹84,22,037.6

1.03

Packing the spare 20Nos. coils in standard packing with wooden boxes

2,00,000

₹2,36,000

Lowest

10,00,000

₹11,80,000

1.04

Transporting the 180 Nos new VPI Insulated coils + 20 Nos. Spare VPI Insulated coils from contractor works to Power House using suitable transporting stand-200 coils

8,00,000

₹9,44,000

Lowest

40,00,000

₹47,20,000

1.05

Supply complete winding kit (Class-F) for stator winding like insulation materials, wedges, packing under the wedges, mouth blocks, insulating tapes, varnish, slot side and bottom side packing, separators and brazing rods

66,00,000

₹77,88,000

Lowest

1,57,79,100

₹1,86,19,338

1.06

Supply of complete winding kit (Class-F) for 20nos. Spare stator winding like insulation materials, wedges, packing under the wedges, mouth blocks, insulating tapes, varnish, slot side and bottom side packing, separators and brazing rods.

19,50,000

₹23,01,000

17,53,233

₹20,68,814.94

Lowest

1.07

Supply and installation of PT-100 RTDs for temperature measurements @stator winding and core. (12+12).

Nos

50,400

₹59,472

Lowest

2,27,880

₹2,68,898.4

Sl No	Description	Qty	Unit	Est. Rate	Est. Amount
1Part A- Supply.
1.01	Design, manufacture and supply of 180Nos.new class ‘F’ insulated VPI diamond type coils with existing coil dimensions and profile in all respect suitable for 55MW (with 10% COL at 0.9PF) loading capability. The following tests shall be carried out during the manufacturing process. i) Dimensional check ii) Coil Resistance Measurement iii) Inter strand IR value test at110VAC for 3sec as ESI Standard 44-7, June 1978 iv) Inter-turn insulation test as per IEEE522:2004 using HVHF test set v) IR value at 5KV before and after HV AC test for1minute vi) HV AC test at 27 kVfor1minute as per BS4999: Part60:1976 vii) Tan delta test at 2.2 KV, 4.4 KV, 6.6 KV, 8.8 kV and 11 KV as per ESI Std 44-7, June 1978 and IEEE Std 286-2000 viii) Partial Discharge Test as per IEEE Std 1434 ix) Voltage Endurance Test on a random sample as per IEEE Std 1043 x) Thermal Cycling Test on a random sample as per IEEEStd1310	-	Nos	-	-
1.02	Supply of spare 20Nos new Class-F insulated VPI diamond-type coils with dimensions and profile as mentioned in item 1.01	-	Nos	-	-
1.03	Packing the spare 20Nos. coils in standard packing with wooden boxes	-	LS	-	-
1.04	Transporting the 180 Nos new VPI Insulated coils + 20 Nos. Spare VPI Insulated coils from contractor works to Power House using suitable transporting stand-200 coils	-	LS	-	-
1.05	Supply complete winding kit (Class-F) for stator winding like insulation materials, wedges, packing under the wedges, mouth blocks, insulating tapes, varnish, slot side and bottom side packing, separators and brazing rods	-	LS	-	-
1.06	Supply of complete winding kit (Class-F) for 20nos. Spare stator winding like insulation materials, wedges, packing under the wedges, mouth blocks, insulating tapes, varnish, slot side and bottom side packing, separators and brazing rods.	-	LS	-	-
1.07	Supply and installation of PT-100 RTDs for temperature measurements @stator winding and core. (12+12).	-	Nos	-	-

Sl No

Description

Qty

Unit

Est. Rate

Est. Amount

1Part A- Supply.

1.01

Nos

1.02

Supply of spare 20Nos new Class-F insulated VPI diamond-type coils with dimensions and profile as mentioned in item 1.01

Nos

1.03

Packing the spare 20Nos. coils in standard packing with wooden boxes

1.04

Transporting the 180 Nos new VPI Insulated coils + 20 Nos. Spare VPI Insulated coils from contractor works to Power House using suitable transporting stand-200 coils

1.05

1.06

1.07

Supply and installation of PT-100 RTDs for temperature measurements @stator winding and core. (12+12).

Nos