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| # | Company | Status |
|---|---|---|
| 1 | Admitted-Fee/PreQual/Technical | Admitted-Fee/PreQual/Technical |
| 2 | Admitted-Fee/PreQual/Technical | Admitted-Fee/PreQual/Technical |
Cancellation of Tender
Single bidder is found eligible.
Single Valid Bid Received
cancelled_1.pdf
Tender Value
₹13.0 L
EMD Value
₹25,960
Closing Date
10 Feb 2026, 4:00 pmClosed
Executive Engineer (E)
O/o Ex-Engineer, M-33kV, 1st Floor, 33kV ESS Kidwai Nagar West, New Delhi-110023
Urgent Repair and Overhauling of Faulty OLTC of Power Transformer (PTR-1, BHEL Make) at Vidyut Bhawan New (Special Repair)
2026_NDMC_286046_1
13 /EE ( M-33kV )/2025-26
Open Tender
Electrical Works
30 days
ESS Vidyut Bhawan
As per NIT
2 documents required · 2 mandatory
₹0
₹25,960
7 May 2026
2 Feb 2026
10 Feb 2026
2 Feb 2026
10 Feb 2026
2 Feb 2026
50MVA 66/33kV Power Transformer OLTC Dismantling, Repair & Replacement: Draining of oil from OLTC vessel & safe storage in drums, Opening of OLTC head cover, dismantling of gear system, Lifting OLTC insert with mobile crane, Replacement of damaged moving & fixed contacts of R-phase changeover switch, Replacement of top cover & inspection window gaskets, Fixing & alignment of drive shaft, operation check on tap positions 1 to 17 and 17 to 1.
50MVA 66/33kV Power Transformer overhauling including Transformer Drying & Oil Processing – Dismantling of conservator / Buchholz relay pipeline, Fixing of dummy plates on radiator bank header pipe, replacement of all gasket, Transformer dry-out using vacuum pump & dry-air generator (dew point ≤ -60°C), Two cycles of vacuum drying & dew point monitoring (12 hrs each), Oil filtration, degassing & moisture removal, Filling of tested oil under vacuum, refilling conservator & radiator, Circulation of oil (4 cycles) maintaining ≥ 60°C temp. Painting of 50 MVA power transformer with glossy paint.
Testing & Commissioning of 50 MVA power Transformer Pre-commissioning electrical tests: i) Tan Delta, Capacitance on bushings & windings, ii) Turns ratio test on all taps, iii) Magnetic balance at normal tap, iv) Vector group verification, v) Short circuit impedance test, vi) IR/PI measurement (15 sec, 60 sec, 600 sec), vii) Winding resistance measurement (tap 1–9B), viii) Oil quality tests: BDV, Moisture (ppm), Resistivity, DGA, ix) Final inspection & report for energization of Power Transformer.
ADD: GST @ 18%
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