MID/AN/97

Repairs to 63 KVA electrical transformer with allied works at LIS Lehrian. The job involves disconnecting all the electrical connections and loading in the vehicle with the help of crane and shifting to workshop with mech. transport. Disassembling the transformer at workshop by unscrewing the bolts of top cover and extracting the damage coils with chain pulley block. Rewinding its 3 nos. H.V. coil &3 nos. L.V. coils with superiorAluminiumwire of requisite size/gauge. Heating the rewinded coils to attain the required megger value.Providing /Fitting of new gasket, L.T. terminal plate, nuts, bolts, insulators etc. Cleaning of the tank and drying it. Providing/Topping up of 145litres transformer oil and heating the oil to make it moisture free. Replacement of damaged 3 nos.HV& 4 nos. LV bush rods with the new bush rods as per sample Lowering the windings back in the tank Assembling the transformer by tightening all nuts, bolts and using oil packing sheets wherever necessary. Loading in the vehicle and shifting back to site . Job includes placing of transformer on the platform with the help of crane using skilled manual labour. Fitting the transformer and restoration of electrical connections. Making of LT side cable connections as well as HT side cable connections and charging the transformer on no load conditions and thereafter checking on full load conditions Complete job including cost of material, skilled and semi-skilled labour charges, loading & unloading at both ends and transportation charges as per site conditions of LIS.(Qty.- 01 Complete Job) Repair to 20 HP 3 phase induction motor of pumping unit no.2 installed at LIS Lehrian. The job involves dismantling the motor by unfastening the foundation nuts and bolts and also decoupling from the pump and disconnecting the electrical connections from the main supply. Shifting of the motor to workshop by mechanical transport . Then complete dismantling of the motor involves extraction of rotor from stator followed by cleaning of stator and rotor using compressed air, organic solvent, CCL4 etc. to remove the dust particles /silt etc. Extraction of burnt winding from the stator, cleaning of stator with petrol .P/F of new winding wire of suitable gauge & size in the stator, varnishing the stator winding with superior quality of varnish. Drying the stator winding with hot air circulation process. Assembling of the motor . Shifting the motor back to LIS . Refitting the motor at its installed position and coupling with pump, making of electrical connections, alignment with pump , testing of motor on full load. Complete job includes the cost of material, labour charges, hiring charges of tools & tackles, transportation charges.(Qty.- 01 Complete Job)

PERFECT ELECTRICAL WORKS (BID ID -2281099)

NATIONAL ELECTRO-MECH COMPANY (BID ID -2283495)