TTPS Operation Circle CAD Complete overhauling of 2 Nos. 6.6KV 500KW Jyoti make CW pumps 2B Motor M10 Sl.No122748, 3B Motor M12 Sl.No122786 at CWPH I

DISMANTLING OF MOTOR: Disconnection of power cable, De-coupling the motor from pump and checking alignment.

Removal of foundation bolts, lifting the motor to a convenient location.

Dismantling of motor pulley, cooler, end covers and Threading out the rotor.

Overhaul of stator: Charges for inspection and cleaning of stator and winding of stator, fastening of the winding to the end ring and also the inter coil spacers and packing in the overhang portion of the winding, tightening of the wedges, spraying one coat of Dr.Beck’s protective enamel and drying out, Stator preheating, checking the IR value and DC Resistance.

Overhaul of rotor: Charges for inspection and cleaning of rotor, checking the position of stampings, cleaning of the corroded parts, Inspection of winding bars, soldered end winding, cleaning of overheated burnt places and applying two coats of Dr.Becks protective enamel and drying out.

OVERHAULING OF COOLERS AND BEARINGS: Checking and cleaning of cooler tubes.

Loading of Top bearing chamber and transported to workshop and unloading, Cleaning the thread holes andfilling Cast steel in holes by cast steel welding , Drilling of 14 x 60mm holes and formed new threads and finishing the surface, Enlarging the chamber cover holes suitable to new S.S. bolt, Forming new thread in Cooling water inlet and outlet, Transporting the reconditioned chamber to CWPH-I and unloading.

Material Cost (Contractor Scope) Cast Steel welding electrode

14 x 60mm SS Bolt with Spring Washer

Cost of consumables such as Emery sheet, Drill pit, Wire brush, Cutting oil.

Transporting charges

Releasing the bearing, cleaning, checking, reassembling / replacing the bearing on both ends lubrication etc.

Bearings supplied by Contractor scope Top Bearing No. 29434-E

Bottom Bearing No. 6236-M

REASSEMBLING AND PAINTING: Assembling of motor after threading in the rotor, fixing end covers, providing rubber gasket and fixing of cooler unit, Checking the IR value, DC resistance and Tan delta.

TRAIL RUN: Lifting of motor, placing at motor bed and tightening of foundation bolts, bed bolts etc. Termination of power cable, coupling the motor with pump, Checking alignment and trial run.

FABRICATION OF SLEEVE IN BOTTOM BEARING HOUSING: Fabrication of Sleeve in bottom bearing housing of 500 KW Motor.

PRINCE ELECTRICALS (BID ID -1118825)