Repairs of 100 KVA transformer at LIS Giddar Galian along with allied works.

Repairs of 100 KVA transformer at LIS Giddar Galian along with allied works.

Disconnecting the 100 KVA electric transformer from the input and output connections, from HT and LT side loading the electric transformer using manual labour & crane /chain pulley block in a vehicle and then shifting it to workshop for repairs. Dismantling of the 100 KVA transformer, at workshop by way of extracting out the Transformer oil, damaged HT coils & LT coils, LT bushes-03 no., HT bushes-03 no., damaged bush insulator, rubber gasket, nuts and bolts. Rewinding of 1 no. HT leg coil with specified wire of appropriate gauge & reconditioning of 3 no. LT leg coils which includes proper tapping and insulation. Keeping the leg coils assembly in the oven to make the assembly moisture free so that required megger value is achieved. Providing and fitting of LT and HT bush rod sets, new insulator, rubber gasket, new copper nuts and bolts and other necessary items. Cleaning of sump of transformer using appropriate chemical agent and then lowering of the coils assembly inside the sump of the transformer after ensuring its compactness by fitting and securing of top channels, and support arms. Filling the transformer oil in the sump after giving heat treatment to make it moisture free and topping up with 80 liters fresh transformer oil. Refitting of the top cover, Testing the continuity of each phase and securing all connections. Shifting the repaired electric transformer back to site at LIS Giddar galian, unloading and installing at transformer hoisting channel with the help of crane and skilled manual labour, connecting of HT and LT supply, commissioning and testing of the 100 KVA Transformer on full load at site. Job includes replacement of damaged thimbles by preparing cable ends and insulating complete. The complete job includes cost of material, labour charges, loading & unloading, to & fro carriage, testing and installation and hire charges of the crane used during the execution of job.

Rebate on Old Parts

N B Engineering and Electric Works (BID ID -2306431)

M/S GOPAL ELECTRICAL