NIT NO.05(M-6)ITEM NO.10

Disconnecting of HT supply from main HT panel after proper switching off 11 KV VCB/MOCB 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 re-insulation of weak point with the help of HT insulation material and proper taping etc.

Cleaning of winding with DC 2-26.

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

Replacement of silica gel.

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

Repairing of LT copper bolt and Pam, remettaling and finishing the same as per original shape and size.

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

P/Fixing of winding protection pad.

Repair of cooling fins, replacement of cooling fins gasket and oil seal for stopping the leakage.

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 transformer with enamel paint.

Insulating the bus bar with epoxy paint.

AUTOMATION HEAVY ELECTRICALS