NIT No. 09 (21-22) Item No. 20

Disconnection of HT supply from main HT panel after proper switching off 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 are 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 precautions to prevent the winding damage as required, cutting of old overheated insulation of winding and re-insulation of weak point with the help of HT insulation material and proper taping etc

Complete cleaning and chemically washing of oily and muddy transformer body.

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

Replacement of silica gel.

Checking and matching of control wiring of all protection relays and calibration of bucchlaz relay and protection relay testing the same.

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

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

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

DEEPAK ENTERPRISES