NIT No.06 Item No.10 (2026-27)

Disconnecting of HT supply from main HT Panel after proper switching off 11 KV OCB discharging the supply. Complete drain out of transformer oil from transformer to empty oil drum by oil machine dismantling of conservator tank all protection relays cable end boxes vent pipes and other items as required

Cleaning of transformer oil tank and removing of sludge settled in the bottom with the help of vacuum pressure cleaning machine thoroughly, cleaning of core and winding of transformer with hot oil and proper safety precaution to prevent the winding damage as required, cutting of old overheated insulation of winding and reinsulation of weak point with the help of HT insulation material and proper taping etc.

Replacement of top cover gasket vertical vent gasket & missing hardware to stop the oil leakage.

Replacement of silica gel.

Complete assembling of transponder cleaning of complete transformer tightening of all connections of incoming and outgoing side and testing & checking of IR test with megger of winding & Cable of both sides with HI pot machine.

Filling of T/oil to up to top up level as required to make power.

P/Fixing of winding protection pad.

Dehydration & filtration of complete transformer oil and checking the side electric strength up to 50 KV at site as required.

Complete cleaning and chemically washing of oily and muddy transformer body and painting of transformer with enamel paint.

Providing and fixing maintenance-free chemical earthing electrode complete with 50 mm dia GI electrode, earth enhancing compound, HDPE chamber with cover, GI reducer, funnel, test link, and watering arrangement complete as required.