REPAIR REFURBISHMENT OF 485 KW 6.6 KV SLIP RING INDUCTION MOTOR FOR MAIN DEWATERING PUMP MOTOR NO 8 AT ACD FOR YSD REPAIR REWINDING OF 400 HP 6.6 KV SYNCHRONOUS MOTOR MAIN DEWATERING PUMP OF WEST AND NORTH PUMP HOUSE OF CG DOCK FOR YSD AT MBI

Amount

Disconnecting incoming/outgoing cable of dewatering pump motor Capacity 485 HP , 6.6 KV Slip Ring motor installed at aircrafts carrier Dock for dismantling of pump motor complete all as specified.

Disconnecting incoming/outgoing cable of dewatering pump motor Capacity 400 HP , 6.6 KV 494 rpm installed at west pump house of CG Dock for dismantling of pump motor complete all as specified.

Removal of RCC cemented soft patch for lifting of motor from underground pump house. The soft patch comprises of 16 concrete blocks with lifting hooks, including breaking of RCC soft patch area, removal of concrete blocks from soft patch groove and fixing of soft patch blocks at its original position and filling of soft patch area post successful trail of motor, After completion of work, the top layer of concrete is to be restored using latest suitable water proofing techniques so that no water shall ingress by leakage or seepage into the underground pump house complete all as specified.

Material & Labour for removal of motor and uncoupled/ dismantled from the base installed at 15 metres (approx) below ground level.The pump motor is to be lifted from foundation in assembled condition. It includes the power/control cable to be properly arranged to avoid any damage.

Material & Labour for removal of motor and uncoupled/ dismantled from the base installed at 20 metres (approx) below ground level.The pump motor is to be lifted from foundation in assembled condition. It includes the power/control cable to be properly arranged to avoid any damage.

Material & Labour for lifting of pump motor using jetty crane of capacity 30 ton and transportation to the factory for repair/rewinding/overhauling and back to work shop to Naval Dockyard (Mbi). Note:- The crane and electricity will be provided by user department/ND(mbi).

Material & Labour for cold test on motor stator and rotor of prime mover of exciter at factory premises. Note:- (i)The contractor shall intimate to user/dept for joint inspection of motor in dismantled condition at factory. (ii) The joint inspection report to be submitted to the higher authority for approval.

Material & Labour for rewinding of stator of 485 HP motor by taking down existing short-circuited coil/poles from stator. The core and slots to be throughly cleaned and tests are to be taken as per IS such as flux loop test to detect hot spots if any. Rewinding the motor with new electrolytic copper conduction and 'F' class insulation,The stator coil will be F class insulation with resin rich moulded slot section to obtain a high density void free insulation system. The coil will be treated with corona protection and stress grading. The winding should undergo pre-varnish test like WR, IR, PIT, ST, PI etc. The winding should be sealed with epoxy gel coat. The slip ring should be fully tested and replaced completely. Replacement of DE and NDE bearing of 485 HP , 6.6 KV Slip ring Motor Existing make JYOTI including lubrication of bearing. The non driving end bearing should be relined and all dimensions should be checked properly. Note;- (i) The above operation is to be conducted with the trust bell mounted on the armature body prior to assembly. (ii) The complete chipping of motor and one coat of primer paint with two coats of siemens grey colour is to be painted before dispatch and rates are included in quoted rates. (iii) The motor is to be assembled maintaining the proper alignment of stator and rotor to maintain proper magnetic centre. (iv) All Tools & plants should be provided by the cotractor for all types of works. (v) The shifting of motor will be done on working day only. (vi) The work shall be got executed at workshop of OEM of Existing make Jyoti and certificate shall be submitted before claiming payment.

Material & Labour for rewinding of stator of 400 HP motor by taking down existing short-circuited coil/poles from stator. The core and slots to be throughly cleaned and tests are to be taken as per IS such as flux loop test to detect hot spots if any. Rewinding the motor with new electrolytic copper conduction and 'F' class insulation,The stator coil will be F class insulation with resin rich moulded slot section to obtain a high density void free insulation system. The coil will be treated with corona protection and stress grading. The winding should undergo pre-varnish test like WR, IR, PIT, ST, PI etc. The winding should be sealed with epoxy gel coat. The slip ring should be fully tested and replaced completely. The non driving end bearing should be relined and all dimensions should be checked properly. Note;- (i) The above operation is to be conducted with the trust bell mounted on the armature body prior to assembly. (ii) The complete chipping of motor and one coated of primer paint with two coat of siemens grey colour is to be painted before dispatch and rated are included in quoted rates. (iii) The motor is to be assembled maintaining the proper alignment of stator and rotor to maintain proper magnetic centre. (iv) All Tools & plants should be provided by the cotractor for all types of works. (v) The shifting of motor will be done on working day only. (vi) The work shall be got executed at workshop of OEM of Existing make Jyoti and certificate shall be submitted before claiming payment.

Material & labour for Testing of motor after completion of repairing, rewinding, overhauling for preliminary test/ no load test/ full load test in presence of user and Accepting Officers representative. The testing includes WR, IR valued rotor and stator, surge test, PIT, HV test, open circuit test, direction of rotation and vibration test complete all as specified.

Material & Labour for lowering of motor on its base frame through soft patch (crane will be arranged by user Naval Dockyard) and motor coupled for adjustment of axial thrust to match the original dimensions. The motor shall then be re-coupled to the pump and base bolts re-installed as directed.

Material & Labour for Pre commissioning of motor with all necessary test before electrical connection. Reconnecting the electric connection and testing the motor on no load, full load complete all as specified. Note:- (i) Two set of certificate of all test to be submitted to the user. (ii) The total guarantee period shall be 12 months or 50 Hrs of operation from the date of commissioning. (iii) The contractor has to ensure adequate safety guards for personnel when employed on works where risk of human health is involved. Any compensation on this respect is sole responsibility of contractor. (iv) The standard safety clause as laid down in the safety standard is to be followed by contractor personnel.

Material & Labour for Testing of panel including repairing the panels with minor repairs like replacement of copper wires etc complete all as specified.

Shree Ayyappa Engineering (BID ID -3171196)

cooltech engineering services (BID ID -3171214)

Darpan Construction (BID ID -3170791)