NIT No. 08 (21-22) Item No. 9

Improvement by dehydration / overhauling of 1000 KVA transformer at Gazipur B.P.Station, job are includes following works :-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.

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

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

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

Replacement of silica gel.

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 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.

GOGIA BROTHERS