Repairs to 250 KVA Electrical Transformer ,100HP Motor along with other allied works of Lift Irrigation Station Chajja of district Rajouri

Amount

Repair to 250 KVA LT electric transformer installed at LIS chajja by way of disconnecting of HT and LT line connections from transformer. Removing the top cover after unscrewing all the nuts and bolts along with dismantling of HT & LT bushes. Taking out the coil assembly using chain pulley and other allied tools and tackles. Extraction of damaged HT coils from the coil assembly at site. Draining out of transformer oil from container at site. Carriage of coils to road side using tools, tackles and manual labour through hilly terrain by head load and then Loading in mechanical transport for further shifting to workshop for repairs. Dismantling of coils at workshop and providing and rewinding of new HT coils for all the three legs and LV coil for 1 No. leg with the Aluminium wire of requisite specifications as per original design and varnishing complete. Drying the coils by keeping in oven. Filtration of old transformer oil by giving proper heat treatment at site. Then carriage back of newly rewound coils and other material to the site of installation. Desludging of complete T-oil by using suitable heat treatment methods and cleaning tank of dust, oily subustances and then welding at the damaged surface to plug the leakage of T oil, cleaning the core assembly with kerosene oil and then after drying lowering it in the transformer tank, P/F of 3 No HT Bush rod assembly and 4 No. LT bust rod assembly with insulators and rubber sheets using skilled labour. Fitting of the newly rewound coils to the legs of the coil assembly and fitting of the core and making connections of the coil assembly. Lowering of the coil assembly in the container after making proper connections. Filling of filtered transformer oil and topping up of new transformer oil 80 litres approximately. Complete assembling of transformer. Making all the electrical connections on HT and LT side by P/F thimbles of required size/rating along with proper insulation. Checking for continuity. commissioning and testing of the Transformer on no load and full load at site

Dismantling of the damaged 100 HP squirrel cage induction motor electric motor of unit no. II at workshop/site for extraction of burnt/damaged windings, cleaning of stator slots and complete rewinding of the motor with new copper wires of requisite guage and specifications and standard. Providing and fitting of new insulation, packing material, then varnishing with superior quality varnish and drying in oven in controlled temperature. The job also includes repairs to the rotor by way P/F of new bearings 2 No for both ends, greasing the bearings and Assembling the stator and rotor, fixing it on base frame with proper alignment after connection to pump shaft, testing on no load and then on full. Complete job includes cost testing and commissioning on full load, material and labour charges with hiring charges of tools and tackles.

Repair of FASD Panel for 2×100Hp Motors installed at LIS chajja by disconnecting the incoming and outgoing cables of LT panel. P/F of new 320 Amp MCCB main incomer,1 no. 200 Amp MCCB of unit no I in place of damaged ones. The job lso involves replacing the old damaged circuit wiring of the panel with new wiring. Servicing of panel by cleaning the contact with suitable chemicals to make it spark free. Complete job includes cost of material and labour charges for skilled and semi skilled labour, hire charges of tools and tackles required at site for execution of job.

M/S RAGHUNATH MECHANICAL AND ELECTRICAL ENGINEERING WORKS

G S ENGINEERING WORKS