Replacement of worn-out carbon brushes and P/F of bearings at DE and NDE to 11kV, 1000 kW HT Vertical Slip Ring Motor (Unit-1) at Lift Water Supply Station Tangnar Stage 2nd

Amount

i) Disconnecting 11KV connection leads (Power cables) and control cables from HT motor, decoupling motor from the Bowl assembly, lowering of motor from its stool and placing the same in the service bay of the pump house. ii) Extraction of rotor assembly from the stator core. The job includes, dis-assembling of bearing housing and slip ring assembly. iii) Cleaning Stator, Rotor and Screens from dust, dirt, oil and grit using Air blower, compressed air hose, bellows and brushes for complete removal of foreign matter from the motor. iv) Re-assembling of rotor assembly in the stator including fitment of shields with allied works following all SOP’s. v) Connecting back respective power and control cables of the motor unit followed by both no-load and full load testing at site.

Replacement of worn-out carbon brushes by way of Providing& Fitting of New carbon brushes of size 65x50x25 mm M16 E with heavy duty double copper tail 100 mm with U-Type copper lug. The job includes re-tensioning of same in brush holder springs at correct pressure and proper alignment to ensure smooth sliding of brushes free from slackness or stiffness using appropriate Torque wrench.

P/F of NU6230C3 bearing at the Driving End “DE” of the HT motor after removing the old bearing also included in the job is packing of fresh grease between cage, races, balls & rollers, the superfluous grease if any has to be wiped out.

P/F of 7324B bearing at the Non-Driving End “NDE” of the HT motor after removing the old bearing also included in the job is packing of fresh grease between cage, races, balls & rollers, the superfluous grease if any has to be wiped out.

M/S SUPREME ENTERPRISES

M/S BHAT ENTERPRISES