WBIW/EE/MDMD/e-SNIT No -01/2026-27

Taking out the L.T. sq. cage Induction Motor after disconnections of supply terminal connections including earthing terminal connection, from coupling end of 25/50 cusec vertical axial flow propeller pump after dismantling the same from the motor stool . The motor is to be kept on wooden sleeper at a suitable distance from the floor without damaging the earthing strips and cables etc. as per direction of E.I.C

Preliminary checking of the whole motor (LT sq. cage IM) and testing of I.R. value, load currents, leakage factor of stator & rotor, terminal lead joints of stator connection ends, insulation of glass fibre terminal bar, double cage rotor end rings and all of motor bars and bar joints, housing of D.E. & NDE shield bearing housing etc. before work to detect fault.

Replacing and jointing of new 1.1KV grade 70 sq.mm. fibre glass copper wire terminals leads by 100% solder (Eyre) compounded with Eyre-7 paste, (6 leads). Above 75KW upto 180KW LT sq. cage IM

Finishing the end of terminal leads by S & F dowells copper sockets properly supplying tapes, petrollium jelly etc. 6 nos. Above 75KW upto 180KW LT sq. cage IM

Cost of mechanical work viz. shaft truness, checking key way looping of holes grinding and polishing etc. Above 75KW upto 180KW LT sq. cage IM

S & F of 395 mm. x 25 mm. x 25 mm. glass fibre bar for L.T.Induction motor terminal with Class-H insulations (Each motor consists of 2 nos. of bars).

Complete servicing and heat varnishing of 415Volt, 3 Phase L.T. sq. cage induction motor after cleaning the stator and heating it up periodically and varnishing by Dr. Beck's graded insulating varnish to obtain stable IR value, cleaning up the rotor, including heating for demoisturisation, lacker coating on the surface of rotor stampings, cleaning and RO priming on the end shield covers, bearing housing and complete the necessary repairing works as per direction of E.I.C. Above 75KW upto 180KW LT sq. cage IM

Complete Rewinding of stator work of 167HP/125KW, 415 Volt, 253 Amp , 3 Phase Induction Motor by HERMATIC CLASS-H/DUAL COATED CLASS H+ super enamel copper wire (Make : RR SHRAMIK Brand) after stripping out the damaged winding coils from the stator slots amd cleaning of the each core slots properly, Re-insulates the slots by Class-H insulations , putting the newly supplied super enamelled copper wire wound coils into the Stator Slots and insulations of the each coil (CLASS-H), to prevent short circuit between PHASE-PHASE and PHASE-EARTH. Taping the coil connection end with varnished Glass Tape. Jointing the bridge connection, batch connection and Terminal-end connection by silver-brazing process and insulation with Glass-Mica tape and Glass insulation tube. Heating the Rewinded Stator properly and varnishing with Dr. Beck's (ELANTAS BECK) ELMOLUFTHERM-H-71 and Epoxy GELCOAT(CLASS-H) varnish and Dried up the winding with slow heating process, develop the moisture proof I.R.-value and complete Rewinding works including supply of new HERMATIC CLASS-H/DUAL COATED CLASS H+ super enamelled copper wire @ 191 Kg, All insulations such as NOMAX PAPER, VARNISHED GLASS TAPE, GLASS-MICA TAPE, GLASS INSULATION TUBE, GLASS FIBER WEDGES STICK, SILVER BRAZING STICK etc. for 167HP/125KW, 415 Volt, 253 Amp , 3 Phase Induction Motor (make - Crompton Greaves) in complete as per direction of EIC. Note: (Salvage value of old/damaged copper wire deducted.)

Refitting the pump motor (LT sq. cage IM) set with all its necessary coupling and accessories to its original position including fitting fixing with bearing housing non-reversable rachet unit and pump shaft with proper tollerance and clearance and reconnection of terminal points the overhauling work i.e. cleaning of contracts sliping etc. (all connection strips, cable end are to be refitted in proper way including good damages of strip terminals) and satisfactory 2 hours trial run of the pump as per direction of E.I.C. for all pumping stations.

Properly checking of the motor, testing of developed IR value, load current factor, terminal lead joints, terminal bar etc. necessary repairing works.