POH of 05 nos. 21.6 MVA, 132/25 KV Power Transformer of JAJ/TSS (2 Nos.), KOO/TSS(1 No.), NLD/TSS(1 No.) & DNR/TSS(1No.) for improving power supply over Danapur Division.

Major reconditioning/POH of 21.6 MVA 132/25 KV traction transformer as per RDSO SMI-TI/MI/00039 Rev. 1 or latest & Tender Specifications.

Post in-situ POH, DGA & other testing like Ten-Delta, BDV, Magnetic balance test. Turns ratio test, IR and PI, SFRA etc. Analysis of transformer after testing and charging.

supply and filtration oil of new insulating transformer oil of EHV grade as per IS 335/1993 (ISI marked) or latest.

Credit of released Transformer oil ( to be retained by contractor) Unit

B - Part - B - Optional items :

Replacement of marshaling box & accessories like cable, glands, terminals etc.

Replacement of PRD.

Replacement of oil Temperature indicator (OTI) (01 no. for M. Box and 01 no. for control panel).

Replacement of Winding Temperature indicator (WTI) & heater (01 no. for M. Box and 01 no. for control panel).

Replacement of Buchholz relay similar to that existing on transformer.

Replacement of silica gel breather.

Replacement of HT bushing of 145 KV, 1250 AMPS suitable for 132/27 KV, 21.6 MVA transformer.

Replacement of LT bushing of 52 KV, 2000 AMPS suitable for 132/27 KV, 21.6 MVA transformer.

Replacement of Radiator valve on tank.

Replacement of Drain valve.

Replacement of Top filter valve.

Replacement of Sampling valve.

Replacement of Buchholz relay insulating valve.

Replacement of Condenser drain valve.

Replacement of Radiator complete.

Bakelite phase board and selector ring.

Brass slip ring.

Brass fixed contacts.

Electrolytic Copper moving contract.

Spring in moving contact holder for contact pressure.

Copper brush assembly.

Bearing for selector shaft.

Flexible braid of electrolytic copper to connect moving contact and terminal stud.

Gears and bearing in driving mechanism.