NIT for Repair and Servicing of Cooling tower 1 and Cooling tower 2, and Ash slurry 1 and Ash Slurry 2 motor

Amount

SOQ for 750 KW, 3Phase, 3.3 KV, 996 RPM, NGEF make Induction Motor

1. Rewinding Of Stator With H Class Winding Conductor & Insulating Material:- Making and forming of complete set of new coils with Super enamelled double fibre glass Covered Varnished Conductor. Forming of mica tube on active portion of set of 54 nos. new coils with H class epoxy enriched glass mica tube. Providing of multiple layer of resin poor glass mica tape. Varnish impregnation in H class varnish of Dr. Beck & baking the same. Conducting of all the relevant test of newly formed coils. Rewinding of stator with complete set of new coils, providing and fixing of new epoxy glass slot wedges, cleats, packers, tying and lacing of coils with glass cord with each other on both the lower and upper over hang portions of winding, Applying of epoxy, making and brazing of connections, insulating the same with H class resin rich glass mica tapes. Drying out and applying of jell coat epoxy by spraying to the complete stator winding, drying out and H.V. testing of the same.

2. Repair/ Rectification of Bearing Seat of NDE/DE Side:- Under cutting of bearing seat , ultrasonic testing , rebuilding with CGS 680 L&T make welding electrode , stress reliving of welded portion of bearing seat , machining, grinding & mirror polishing of the same by maintaining of ovality within permissible limit .01/.02 mm. Dimension Check wrt bearing Housing.

3A. Repair/ Rectification of DE/NDE Side Bearing Housing:- Under Cutting of bearing housing, re-sleeving with bush of CI material, machining the same on precision lathe machine as per standard bearing OD clearances based on bearing sizes.

3B. Re-insulating of NDE side bearing Housing with fibre glass insulation. Testing of Re-insulated NDE side bearing Housing with IR tester of 500V. Submission of test result for the same.

4. Checking of run out of rotor on precession lathe machine & dynamic balancing of the rotor.

5. Dismantling of motor, threading out of rotor from the stator, cleaning of all the mechanical parts, replacement of new bearing supplied by NFL,PNP. Greasing of bearings, assembling & testing of motor on no load 0.4KV.

6. Strengthening of both side terminal boxes and lifting hook of motor. Cleaning of radiator tube, Installation of new grease pipe, refurnish the grease pipe threads and clamping of the same on motor body. Any additional job for smooth functioning of shall be in party scope.

SOQ for 200 KW, 3Phase, 3.3 KV, 1486 RPM, NGEF make Induction Motor

7. Re-Staggering of Stator Core: De-brazing of connection joints of damaged stator winding, dismantling of old slot wedges taking out of all the core from the stator slots. De-locking & dismantling of core punching from the stator body, straightening, smoothening of all the core unchings, cleaning of old varnish chemically and Phosphating treatment of all the core punchings with core plate varnish coating in automatic varnish coating tunnel type Temperature controlled Conveyorised baking oven, H.V. test, scratch test and uniform thickness test on varnished and baked core punchings. Assembling of core punchings in stator body shell by staggering, repressing hydraulically, locking & hot spot testing of complete assembled stator core. Payment for this item shall be released only if above job is executed.

8. Rewinding Of Stator With H Class Winding Conductor & Insulating Material:- Making and forming of complete set of new coils with Super enamelled double fibre glass Covered Varnished Conductor. Forming of mica tube on active portion of set of 48 nos. new coils with H class epoxy enriched glass mica tube. Providing of multiple layer of resin poor glass mica tape. Varnish impregnation in H class varnish of Dr. Beck & baking the same. Conducting of all the relevant test of newly formed coils. Rewinding of stator with complete set of new coils, providing and fixing of new epoxy glass slot wedges, cleats, packers, tying and lacing of coils with glass cord with each other on both the lower and upper over hang portions of winding, Applying of epoxy, making and brazing of connections, insulating the same with H class resin rich glass mica tapes. Drying out and applying of jell coat epoxy by spraying to the complete stator winding, drying out and H.V. testing of the same.

9. Repair/ Rectification of Bearing Seat of NDE/DE Side:- Under cutting of bearing seat , ultrasonic testing , rebuilding with CGS 680 L&T make welding electrode , stress reliving of welded portion of bearing seat , machining, grinding & mirror polishing of the same by maintaining of ovality within permissible limit .01/.02 mm. Dimension Check wrt bearing Housing.

10. Repair/ Rectification of DE/NDE Side Bearing Housing:- Under Cutting of bearing housing, re-sleeving with bush of CI material, machining the same on precision lathe machine as per standard bearing OD clearances based on bearing sizes.

11. Supply and Repair/ Replacement of Damaged rotor bars

12. Checking of run out of rotor on precession lathe machine & dynamic balancing of the rotor. Submission of report for the same for before and after balancing.

13. Dismantling of motor, threading out of rotor from the stator, cleaning of all the mechanical parts, replacement of new bearing supplied by NFL,PNP. Greasing of bearings, assembling & testing of motor on no load 0.4KV.

14. Strengthening of both side terminal boxes and lifting hook of motor. Cleaning of radiator tube, Installation of new grease pipe, refurnish the grease pipe threads and clamping of the same on motor body. Any additional job for smooth functioning of shall be in party scope.

15. Transportaion to & fro (From NFL panipat unit to respective party site)

EMCO ELECTRODYNE PVT LTD

indian engineering company