Rewinding and repairing of 12 (Twelve) nos (20HP) Submersible electro motor pump set of different make for own and operated schemes of Krishnagar_II (AI) Sub_Division under Krishnagar_I (AI) Division for the FY _ 2025_26

Dismantling of different H.P 2800/2900/3000 RPM submersible motors, removing old burnt out coil from slots carefully, segregating all the parts, washing and cleaning the same thoroughly for verification of serviceable and unserviceable parts as per direction of E.I.C. b) 17.5 H.P./19.25/20 H.P. submersible motor.

Rewinding of different H.P 3 phase 410-440 volts ,50 Hz ,2 / 4 poles submersible motor of different make with PVC insulated copper winding wire (1mm to 2mm nom. dia.) as per IS 8783, 1995, part 4 Sec 1 (FINOLEX/ INCABE make to be approved before use) as provided by the motor manufacturer including supplying fitting and fixing fire proof fibre chips on slots for keeping winding wires in position, taped by using water proof tape of 660 volts grade with main cable and fitted with water tight compound by using steel grip tape and vulcanised rubber tape by heating, changing thrust plate, ball retainer and ball including supplying fitting, fixing rings circlips for thrust plate, water seal ring, diaphragm, bush bearing etc. complete as per direction of E.I.C (c)17.5 H.P / 19.25H.P / 20 HP 3 Phase 410-440votls,50 Hz 2 pole , 26 amps - 30 amps submersible Motor i)Supply of PVC insulated copper winding wire conforming IS 8783, 1995, part 4/ Sec 1.Length of copper winding wire - max. 450 mts. ( i-c) 1.7mm nom. Dia for 20 H.P

(ii) Labour charge for rewinding, water proofing ,fitting and fixing fire proof fibre chips on slots for keeping winding wires in position, taped by using water proof tape of 660 volts grade with main cable and fitted with tight compound by using steel grip tape and vulcanised rubber tape by heating as per direction of E.I.C. a) 17.5 H.P. to 20 H.P.

Repairing of damaged motor shaft by metaling with electric welding & turning properly to house in the bearing space & coupling side teeth and also rectifying the dynamic balance of the rotor to its original alignment to avoid any vibration all complete as per direction of E.I.C.

Supplying fitting & fixing the winding protector on both sides (Top & bottom)

Supplying fitting & fixing the bush bearing for motor in place of damaged as per approval and direction ofthe E.I.C. 20.0 H.P. a) Top for motor

Supplying fitting & fixing the bush bearing for motor in place of damaged as per approval and direction ofthe E.I.C. 20.0 H.P. b)bottom for motor

Supplying, fitting & fixing drain plug made from brass metal with gasket and washer (One for drain plug, one for water filling plug and one for venting plug).

Supplying, fitting & fixing stud bolt with nuts for top and bottom cover.

Supplying, fitting & fixing stud bolt with nuts & washer for upper flange as per sample.

Supplying fitting & fixing thrust bearing retainer as per sample

Joining water proof cable with the leads of the motor including soldering with requisite water proof insulation & proper jointing compound valcanised rubber tape so that proper water proof insulation is assured.

Supplying fitting & fixing S.S slip of rotor shaft including removing out of the old one as per direction of the E.I.C.

Supplying, fitting fixing fero asbestos- lining on the thrust plate as per direction of the Engineer-in-Charge.

Supplying, fitting& fixing pivot segment steel balls on the thrust bearing housing as per direction of the E.I.C. (6 nos. in one set with rubber guarder/ circlip etc.) b) 17.5 H.P. to 20 H.P.

Supplying fitting & fixing the axial thrust plate of the motor shaft including supplying of Key etc. all complete as per direction of E.I.C. a) 12.5 H.P. to 20 H.P.

Supplying fitting fixing of (thrust bearing segment) Pivot segments (set of 6) made from Phosphorus bronze as per sample and as per direction of Engineer-in-Charge. b) 17.5 H.P. and above

Supplying, fitting and fixing the self aligning thrust plate of the motor shaft including supplying of key etc. all complete as per direction of E.I.C.

Re-assembling the submersible motor after completion of rewinding and repainting and allied work with the repaid spares parts or new spares where necessary (to be supplied departmentally on requisition) including checking of all accessories and supplying necessary screws nuts and fitting fixing the whole thing properly as per direction the E.I.C.

Dismantling submersible pump/ bowl assembly suitable for a capacity of30/150/ 200 cum. Per hour capacity against a total head of 15 mtrs. to 30 mtrs. of different make and segregating all spares fitted with the pump including washing and cleaning the same thoroughly for verification of serviceable and unserviceable spares as per direction of the Engineer-in-Charge

Repairing of stage bowl and other spares when necessary by welding turning and re-threading including supplying & fitting, fixing new studs, nuts, washer, impeller key, coupling Key with lock nut complete as per direction of Engineer-in-Charge.

Supplying & fitting fixing stainless steel shaft as per sample and approval of the Engineer-in charge

Supplying, fitting & fixing the body (Bowl) Bush (suitable for specified RPM of pump (motor set) as per direction of the Engineer-in-charge. Two nos

Supplying fitting & fixing stainless steel Pump coupling as per sample.

Supplying fitting & fixing stainless steel sleeves with 2 nos. S.S. Nut as per size and sample.(two nos)

Supplying fitting & fixing ceramic filter with circlip& rubber guarder (original of a particular make of pump).

Supplying, fitting & fixing Impellor seal ring made of phosphorous bronze.

Supplying, fitting & fixing sand guard made of gun metal as per direction of E.I.C.

Repairing impellor by metalic gas/electric welding with gunmetal Stick & turning, fitting, fixing in proper position as per direction of Engineer-in-Charge.

Labour charges for re-assembling the submersible pump after completion of repairing work of spares etc. and allied works with repaired spares or new spares when necessary to be supplied departmentally which are not provided in schedule including screws nuts, lubricating materials etc. as required as per direction of the Engineer-in-charge.

Installation of submersible electro motor pumping set of following capacities by using necessary requisite, tools and plants by lowering the same within the tubewell housing pipe upto the following depth as per direction by fitting, fixing column pipes and other accessories, fixtures with necessary nuts, bolts and washers and suspending the entire assembly of pump set vertically by fixing the same supported by M.S. clamps over the top of housing pipe, binding the motor cable with each column pipes and drawing cable upto pump controller/starter point including opening out of the top cap of housing pipe of the tube well and testing of motor both in loading as well as in unloaded condition before and after installation of the same. (The rate is inclusive of hiring charges of tools & plants.) (a)100/150/200 cubic meter per hour capacity electro motor (i) Length of pump assembly of any length exceeding 18 meter length.

Testing of repaired motor by continues 8 hrs running on load as per direction of E.I.C.

Withdrawal of electro motor submersible pumping set of following capacities from within the tube well housing pipe of the following length by using all necessary requisites tools and plants and carefully as per direction of Engineer-in-Charge and stacking the same properly at site within the tube well premises complete. (a) 100/150/200 cubic metre per hour capacity electro motor pumping set. (i) Length of pump assembly of any length exceeding 18 meter length.

Carriage of motor pump from store to workshop and back to store after repair. (This item is only applicable when written permission is available from E.I.C. where there is no facility for such work in the sub- division.

Painting two coats of both inner & outer portion with best quality synthetic enamel paint (to be approved before use) including smoothing surface by sand paper for removing old paint as per direction of E.I.C. (a) Motor

Painting two coats of both inner & outer portion with best quality synthetic enamel paint (to be approved before use) including smoothing surface by sand paper for removing old paint as per direction of E.I.C. (b) Pump

Deduction towards dismantled burnt enamelled copper wire from induction motor on the basis of actual measurement to be retained by the agency. (Note: In case of PVC insulated copper wire to arrive at net burnt weight 10% deduction will be made) (assuming 7.25 kg Recovery of Copper per Motor

Add.- L. W. Cess @ 1.0 %

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