Restoration of Flood hit Electro Mechanical Machinery of LIS Chajja with allied works

Amount

Repairs/servicing of 2x100 Hp automatic star delta starter by way of P/f of protection relays with built in single phase preventors with suitable relay range for 100HP motors with manual and auto reset modes 2 No. one for each unit and one no 140 Amp. Contactor for unit-I by replacing of damaged components, with rewiring of the control cables with p/f of new current transformers 2no. The job also includes complete reconditioning of 2 no 100 HP ATS(standby) by way of extraction of coils drying and varnishing, cleaning of the tanks and contactors thimbles, reinstallation of coils and making connections. The job includes cost of material, hire charges of tools and tackles and skilled labour including testing at site.

Servicing of 100 H.P (1 nos.) motor by way of opening of side covers then extraction of rotor & stator. Cleaning the stator and rotors, drying the windings using heater/hot air in controlled way so as not to damage the windings due to heat for two to three days intermittently and then applying two coats of varnish and drying each coat by hot air process. Fitting the rotor and complete greasing of bearings properly. P/F of 1 no. bearing as per sample for unit no I. Fitting the damaged cable ends at motor side after repairs and then thimbling them properly by P/F of copper thimbles of required size. Servicing of 3cusec x 55m head horizontal casing pump set coupled with 100 H.P motor, by way of dismantling of the pumps, de-coupling from the motor and suction delivery lines at site, P/F of new gland packing 12mm dia with nuts, bolts and rubber sheet after cleaning the gland bushes and gland plate sets, applying sufficient amount of grease including gland packing to avoid excessive wear and tear. Complete assembling of pumps and its refitting back to its position at site for installation. The job further includes coupling the pump and motor for both units, checking for alignment and testing on full load. Job involves cost of materials, labour charges both skilled and un skilled labour and hire charges for tools and tackles, transport charges, and testing of Pumping unit at full load. Rebate on old parts has to be provided by the executing agency on account of providing/ fitting of new parts/ components. (Complete job)

Replacement of the damaged and worn-out components of the 250KVA voltage stabilizer of LIS Chajja. Job includes disconnecting all the electrical connections of the stabilizer both on LT transformer side and LT distribution panel side by way of removing old rusted thimbles along with nuts and bolts. Shifting of the stabilizer to the nearest roadside by manual head load and loading of the same in the transport vehicle for further carriage to the workshop by employing hydraulic crane and manual labour at site. Replacement of the worn-out components of the voltage stabilizer at workshop by way of removing its top cover for extraction of inner assembly from the casing sump. Providing and fitting of new 03 nos. copper coils of requisite size and specifications, new insulation material and nuts/bolts, varnishing drying in hot air circulation after drying and cleaning the rusted core because of submergence of core due to flooding. Lowering of the coils inside the casing. Also, replacements to the damaged components of rotor switch assemblies by providing/fitting of new set of brass bush rods for all individual phases on LT side. The job involves providing/fitting of 01no. voltmeter. Job also includes draining out the old T Oil from the voltage stabilizer and heating to remoisturize it completely, cleaning and de-moisturizing of the stabilizer casing, providing and filling of fresh transformer oil (250 liters approx) to be provided by the department along with heat treatment and filtration of old T-oil. Providing and fitting of top cover gasket, nuts/bolts and complete reassembling of the stabilizer at workshop. Shifting back the voltage stabilizer to the site. Unloading the same at site employing hydraulic crane/manual labour and shifting by manual head load into the pump room for re-installation. Reinstallation of the voltage stabilizer in the pump room by fixing all the electrical connections, providing/fitting of new nuts/bolts. Testing of the 250 KVA voltage stabilizer on partial load and then on full load at site. Complete job includes cost of materials, hydraulic crane charges, cost of rebate on account of old copper scrap, skilled/semi skilled labour charges and tools and tackles required during the execution of the job

N B Engineering and Electric Works (BID ID -2251849)

GS ENGG WORKS (BID ID -2249906)