SE/ES/ MTPS-I/EM-II/OT.No 04/2021-22

Amount

Disconnection of HV Power cable & its terminal box and earth flats.

Disconnection of LV Power cable & terminal box.

Releasing the old transformer oil from tank and Releasing the radiator cooling fins, valves and cleaning by using forced oil method.

Releasing the Buchholz relay, conservator tank, vent pipe, oil & winding temperature gauges, Disconnection of winding CT terminals.

Removing the top cover of the transformer and Disconnecting the HV/LV leads from Bushings and lifting the core and winding

Complete cleaning of the Transformer tank, Core, Winding, Sludge removing and removing old gasket.

Complete cleaning of the Tap switch and attending defects if any during testing.

Cleaning, servicing and gasket replacement to Buchholz relay, MOG, oil level gauge glass, explosion vent pipe, conservator tank, silicagel & replacement of diaphram

Dismantling of HV & LV Bushings, cleaning, checking the bushing rods, replacing the deteriorated O rings & gaskets by new, assembling and fixing in the transformer tank.

Repositioning of the core & winding assembly in Transformer tank and reconnecting the HV/LV leads

Providing New Gasket at top cover and fixing the top cover

Fixing the radiator cooling fins, valves, conservator tank, Buchhloz relay, explosion vent pipe, WTI, OTI, winding CT bushings, breather pipe & breather in complete shape by replacing all deteriorated gaskets by new one.

Leading the oil filter machine from its shed to transformer location and extending power supply, transport back to its shed after completion of hot oil circulation.

Filling up the transformer with new transformer oil through oil filter machine.

Hot oil circulation till the IR value of the transformer winding & breakdown value of the oil reaches the required level and attending to the connected & related works.

Connecting HV Power cables, fixing terminal box & earth flats.

Connecting LV Power cables & terminal box / LV Bus duct terminals and fixing terminal box and assisting in testing the transformer.

Drawl of new transformer oil drum from stores & transporting to transformer location, Preheat oil circulation of newly drawn oil and devoluting of released oil drum to stores (Lorry, crane, oil filter machine will be supplied by TANGEDCO )

Scrapping, cleaning and Painting the Entire Transformer surface with 2coats of DA Grey Paint for two transformers(Surface area / transformer=118 m2 )

Material cost for Neoprene bonded rubberized cork gasket. a) 10 mm thick RC 70C 900 x 900 mm size

b) 8 mm thick RC 70C 900 x 900 mm size

c) 6 mm thick RC 70C 900 x 900 mm size

d) 3 mm thick RC 70C 900 x 900 mm size

DA Grey paint ( For 2 Nos. transformers)

Cost of Consumables