Repairing of 2.5MVA,11KV/3.3KV power transformer of Pit no 01 at J K Nagar Colliery
Eastern Coalfields Limited · J K Nagar Colliery, West Bengal · Repair, Maintenance & AMC Services · open
Key facts
- Tender value: ₹9.5L
- EMD: ₹12K
- Published: 16 Oct 2026
- Closing date: 26 Oct 2026
- Status: open
- Status as of: 20 Oct 2026 23:26 UTC
- Ministry: Ministry of Coal
- Department: Eastern Coalfields Limited
- Office: ECL Satgram Area
Description
Repair of a 2.5MVA, 11KV/3.3KV power transformer at Pit No. 01, J K Nagar Colliery, including dismantling, rewinding and insulation work, oil filtration, reassembly, installation, testing and energizing.
Eligibility & requirements
- Startup relaxation: No
- MSE relaxation: No
New to these terms? Read how tender eligibility criteria work.
Commercial terms
- Bid type: Item Rate
- Evaluation: L1 bidder based on Cost to Company (CTC)
- Make in India (MII): No
- MSE preference: No
Line items (17)
- 2 — Qty: 3 4
- Dismantling of core & winding from the transformer tank & cleaning of all parts of transformer property — Qty: 1 Nos
- Cost of Copper Conductor, windings shall be wound from Super Enamel covered / Double Paper covered Electrolytic Copper conductor — Qty: 760 Kg
- Insulation of conductor for primary coils (new copper strip 760kg) & secondary coil (existing old copper strip 516kG) by double coated manila paper — Qty: 1276 Kg
- De-hydration & filtration of transformer oil to improve Dielectric strength upto 60kV BDV — Qty: 2100 Ltrs
- Cost of brazing with supply of rupton rod, oxygen, DA for brazing of all the primary & secondary coil — Qty: 1 Nos
- Cost of insulating material, varnishing, pre compress paper board, oil duct, cotton tape, webbing tape etc — Qty: 1 Nos
- Reformation of coil primary and secondary — Qty: 1 Nos
- Fitting of core channels, primary & secondary coils & winding into the transformer tank — Qty: 1 Nos
- Providing neoprene gasket for all the joints of each parts such as top cover, inspection cover, insulators cooling fins etc. — Qty: 1 Nos
- Assembling and installation of transformer at site which includes placement of transformer. Pre commissioning, testing and energizing. Details of Pre commissioning test including TC. 1) Insulation Resistance test. 2) High Voltage Pressure test. 3) Vector Group test. 4) Magnetic Balance test. 5) Voltage Ration on all tap position. 6) Di-electric test of transformer oil 7) Transformer oil acidity test — Qty: 1 Nos
- Supply & fitting of copper studs — Qty: 7 Nos
- H.T tape other insulation like mica nomex to be fitted all copper jumpers and other connection side — Qty: 7 Nos
- Multi core control cable — Qty: 30 mtrs
- Repairing and fitting of tap changer switch — Qty: 1 Nos
- Labour charges for doing the job — Qty: 1 Nos
- Supervision charges — Qty: 1 Nos
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