N.I.T. No. 07 2024 25 Item No.7

Disconnecting of HT supply from main HT Panel after proper switching of 11 KV VCB 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 the winding and re-insulation of weak points 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 transformer. Cleaning of transformer, tightening of all connection of incoming and outgoing side and testing & checking of the IR test with megger of winding and cable of both sides with HI pot machine.

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

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

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

Ajay Prakash Mishra (BID ID -1553894)