Overhauling and bearings replacement of GT Compartment Motors -6 Nos.

Amount

Decoupling &Coupling of Blower / Fan Charges for dismantling of Blower / Fan assembly and its frame from the GT compartment top, Removal of Blower / Fan blade from motor shaft by way of heating and welding appropriate fixtures to the frame. Re-assembling of Blower / Fan blade to the motor shaft after completing the overhauling of motor and bearing replacement, Lifting the assembled Blower and Fan along with frame assembly to GT compartment roof top, Reinstalling of frame assembly on its original place and normalization by using available hydraulic crane during Hot gas path inspection. (Crane is under KGTPS Scope)

Dismantling of Motor and Removal of Motor End Covers & Rotor Charges for disconnection of power and space heater cable, Dismantling of Motor from its bed and removing the seal covers, fan and end covers and threading out the rotor and cleaning of all parts of motor. (5.5KW- 1No., 2.2KW- 1No., 15KW – 1No., 11KW-2 Nos., 55KW-1No.)

Inspection of Stator winding Charges for inspection and cleaning of stator and restoration of loosened fastenings of stator winding to the bondage rings and also the inner coil spaces and packing in the overhang portion of the windings, checking the tightness of wedges and replacing if needed. Paint the stator winding with Dr. Bectol insulating varnish. Measure the stator windings DC resistance, IR value after drying out by external electrical heater and compare it with previous values.

Overhauling and Inspection of Rotor & Bearings Charges for inspection and cleaning of rotor, checking the position of stampings, cleaning of corroded parts if any, Inspection of winding bars soldered at end rings, cleaning of overheated or burnt plates. Remove the non-drive end and drive end bearings from the capsule. Cleaning, checking of bearings condition and mounting of new / old bearings into the capsule. Bearings to be provided by Contractor. All consumables required for completeness of the work is under contractor scope.

Painting of Motor Charges for complete cleaning of motor stator frame, end covers, fan cover and painting with two coats of ready mixed enamel paint of high quality(Make: Berger / Asian paints)

Re- Assembling of Motor and Re-Erection of Motor Charges for re-assembling the rotor inside the stator frame. Fixing of end covers, fan blade and fan cover. Lifting the motor assembly at appropriate place. Carrying out trial run operation of motor on load and close monitoring of performance continuously. Re erection will carried out by using available hydraulic crane during Hot gas path inspection. (Crane is under KGTPS Scope)

Bearings i.6313C3 New SKF Imported Bearings or Equivalent

ii.6206ZZ New SKF Imported Bearings or Equivalent

iii.6309 New SKF Imported Bearings or Equivalent

iv.6309C3 New SKF Imported Bearings or Equivalent

v.6209ZC3 New SKF Imported Bearings or Equivalent bearing cost

vi.6308 New SKF Imported Bearings or Equivalent

vii.6306 New SKF Imported Bearings or Equivalent

SARVESWARASAMY AND CO (BID ID -1219021)