Repairs and replacement of spare parts etc of 1000 kW, 11 KV HT Vertical Slip Ring Motor (Unit-1) at Lift Water Supply Station Tangnar Stage 2nd

Amount

Disassembling the motor by way of disconnecting of the motor from stool, removing of cable connections, removal of bearing shields, housings etc. Thereafter extraction of Rotor from Stator Capsule is also to be undertaken. Disassembling of rotor assembly in the stator capsule shall be carried out without using excessive force including removal of bearing housings on two sides.

Providing & Fitting of New bearing temperature sensors as per sample after replacement of damaged ones.

Replacement of existing worn out carbon brushes with 12 No's ( Twelve No's) carbon and graphite metal composition heavy duty carbon brushes of size 65x50x25 mm having double copper tail of 100 mm length with U-type copper lug having double slanted cut on sliding side of carbon brush. The job includes opening of available windows on the top shield of motor, removing the worn-out carbon brushes from the carbon holder assy. motor by disconnecting the carbon brush leads/ lugs after opening the fasteners using highly skilled relevant technicians, tools tackles for carrying the job to be arranged by the firm/ agency carrying out the said job. The job includes connecting the above new carbon brushes with the system through carbon brush holder and checking the stability after cleaning the slip ring of the rotor assy. against build-up of dirt/ dust including weared carbon brushes particles using air blower and suitable hand grinder/ sand paper.

Reconditioning of roughened Slip Rings by way of turning/machining on lathe for the smooth finish including jig and fixture arrangement for holding work, the job has to be carried out by highly skilled men without causing any damage to slip rings.

Machining of the deformed bearing housings both DE & NDE sides, by removing its ovality after centering on the lathe. The job then includes rebuilding of the bearing housing by way of fitting of MS Sleeve and metal deposition through suitable means followed by its machining to the original size (as per bearings) to make it perfect fit with the outer diameter of the respective bearings. The work of rebuilding has to be done in intervals allowing sufficient time for the work-piece to cool and attain the normal temperature by natural means to avoid its deformation due to overheating, before starting subsequent runs of material deposition. Further included in the job is buffing of the machined surface of the bearing housing to achieve smooth and abrasion free surface. The job includes all charges on account of gradual metal deposition, machining etc on lathe and buffing with appropriate buffing tool kit and allied tools tackles required for execution of the job.

Repalcement of Old Damaged bearing by way of Providing/Fitting of New Angular contact ball bearing 7324 B having brass cage of SKF/FAG make to 1000 kW, 11 kV, 1488 rpm Slip Ring motor unit-01 inclusive of all required skilled labour and tools tackles.

Repalcement of Old damaged bearing by way of Providing/Fitting of New Single row deep groove ball bearings 6230 C3 of SKF/FAG make to 1000 kW, 11 kV, 1488 rpm Slip Ring motor unit-01 inclusive of all required skilled labour and tools tackles.

Reassembling of rotor assembly in the stator capsule without using excessive force including fitment of bearing housings on two sides. The job includes fitment of shields with allied works. Reasembling s of the motor to be followed by successful testing motor 1st on no load & then on full load .

Replacement of damaged Single phase preventer by way of P/F of new Single phase preventer of minilec make , Model VSP D1 with auxillary supply=415 VAC as per site requirement inclusive of all required skilled labour and tools tackles.

Replacement of damaged Water Level Controller by way of P/F of new Water Level Controller of minilec make , Model WLC D1 as per site requirement inclusive of all required skilled labour and tools tackles.

M/S SUPREME ENTERPRISES

M/S BHAT ENTERPRISES