Repair to electro -mechanical machinery and gates installed at LIS Katal Batal and Repair to 2.5 cusec discharge pump and 12.5 HP motor along with allied works at LIS Chung

Amount

Repair to electro- mechanical machinery and gate at LIS Katal Batal

Dismounting of 120 HP VT motor slip ring type of Unit-IV from base frame after disconnecting all the electrical connections installed at LIS KatalBatal. Providing and fitting of new carbon bushes- 6 no., new brass nuts, bolts with washer 3 Nos., Bakelite plate, P/F of 3Nos copper thimbles of appropriate rating/size after cutting the damaged/ burnt end and then dressing of 37/16 copper cable ends and crimping them using crimping tool and insulating it properly of rotor assembly.P/F 6Nos. copper thimbles of appropriate rating and crimping them and insulating it properly of motor. The job also includes thimbling of 3.5 core aluminum cable of voltage stabilizer using crimping tool and insulating it properly. Excavation in trench after bush cutting and branch shedding at the site of installation and extracting out 3.5 core 400 sq.mm aluminium service cable. Cutting of leaking joints, thimbles, stripping of the cable ends and repairs of damaged / burnt 3.5 core 400 sq. mm aluminum main service cable by way of rejoining the cable with thimbles, nuts/ bolts and insulating it.Complete job includes cost of material, labour charges, and hire charges of tools and tackles used.

Extraction of column assembly line of 10 cusec VT pump unit-IV by way of dismantling of the top assembly and extraction of the suction pipes 10” dia, spider guides, line shafts to rectify the leaking of the pipe joints. P/F of rubber gaskets 5 Nos for flange cut to the required size from rubber sheet by making holes of required size to match with the flange and also making necessary repair to the flange assembly to avoid leakage at suction pipe. Lowering of the column assembly line after fitting of new rubber gaskets by using new nuts and bolts/ studs. Refitting of the top assembly. Fitting the 120 HP motor on the base frame. Making all electrical connections and testing the motor at no load and on full load at site. Complete job includes cost of material, labour and hire charges of tools and tackles used.

Dismounting 75 HP VT motor of unit-II from base frame after removing all the electrical connections. Dismantling the motor by removing its top cover. Dismantling the top cover and ratchet to take out the DE & NDE bearing. Refitting of the bearings after drying it and filling with required amount of grease and m-oil. Servicing of the rotor shaft by properly cleaning it. Reassembly of motor. Fitting serviced motor on the base frame. Making all electrical connections and testing the motor at no load and on full load at site. Complete job includes cost of material &labour charges, carriage charges with hire charges of tools and tackles..

Dismantling the 75 HP oil immersed star delta starter from installed position of pumping unit no. II after disconnecting all electrical connections from input and output side. Repair to starter by way of extracting out the damaged copper contact points both moving and fixed, thimbles, no volt coil, tripping system , overload relay and replacing the same with new ones , minor repairs to handle mechanism . Providing/filling of 10 litres transformer oil for topping of starter after demoisturing the existing oil. Back carriage of the starters to LIS for reinstallation, commissioning and testing on full load and no load. The job includes cost of material, labour charges, installation and testing charges at site..

Dismantling the 120 HP oil immersed star delta starter from installed position of pumping unit no. IV after disconnecting all electrical connections from input and output side. Repair to starter by way of extracting out the damaged copper contact points both moving and fixed, thimbles, no volt coil, tripping system , overload relay and replacing the same with new ones , minor repairs to handle mechanism . Providing/filling of 10 litres transformer oil for topping of starter after demoisturing the existing oil. Back carriage of the starters to LIS for reinstallation, commissioning and testing on full load and no load. The job includes cost of material, labour charges, installation and testing charges at site.

Repair of the gate (5’-9” X 2’-6”) at Katal Batal by way of extraction of gate outside the frame using necessary tools and tackles & manual labour / crane after dismantling of winch machine and lubricating the frame. Strengthening of leaf structure at site or at workshop by way of welding/ replacement of MS sheets / channels as per site requirement. Providing /fitting of stem rod by way of fabrication and turning, threading and finishing to size as per sample. Repairs to winch machine by way of providing and fitting of gears and then greasing & oiling using standard quality grease after removing the old grease and washing / cleaning with appropriate cleaning agent to make it dust free. The job includes complete removal of old paint by sand paper and painting of both winch machine and gate with one coat of metal primer and two coats of paint. Reinstallation of the repaired gate at site and satisfactory commissioning. The job includes cost of material, hire charges of tools and tackles, crane, manual labour, nut/bolts, washers etc. required for the job including labour charges.

Repair of the gate (4 ’-10” X 2’-6”) at Katal Batal by way of extraction of gate outside the frame using necessary tools and tackles & skilled manual labour/ crane after dismantling of winch machine and lubricating the frame. Extraction of the stem rod and shifting the gate structure to work shop for repairs. Straightening of stem rod by giving heat treatment and then pressing/ straightening using a press. Strengthening of Gate leaf by welding at worn out portions of the skin plate and channels with superior quality electrodes.Minor repairs to the damaged rain pipe to ensure proper sealing of the gear box. Repairs to gear mechanism of the gate by replacing the damaged gears and greasing & oiling using standard quality grease after removing the old grease and washing / cleaning with suitable solvent to make it dust free. The job includes complete removal of old paint by sand paper and painting of both winch machine and gate with one coat of metal primer and two coats of paint Reinstallation of the repaired gate at site and satisfactory commissioning. The job includes reinstallation of the gate at site and testing for its smooth operation. Complete job includes cost of material, carriage, transportation(to & fro), loading/unloading, hire charges of tools and tackles/ crane, manual labour, nut/bolts, washers etc.required for the job including labour charges.

Rebate on account of old parts

Repairs of 2.5 cusec discharge pump & 12.5 HP motor along with allied works at LIS Chung.

Decoupling of the pump and motor and dismantling of pump of 2.5 cusec discharge (M&P make) and 12.5 HP motor (Alstom make) from foundation of unit-I installed at LIS Chung after disconnecting all electrical connections. Taking out from the pump room and then carriage to road side with the help of tools, tackles using manual labor. Loading in mechanical transport for shifting to workshop for necessary repairs. Then carriage back in similar manner after conducting necessary repairs.The job includes labour charges, transportation charges (to & fro), loading and unloading and hire charge of tools and tackles required for executing the works.

Repairs to 2.5 cusec pump at workshop by way of dismantling and extracting of old and worn out parts i.e. bearings, sleeves check nut, gland packing, gasket, gland bushes, pump shaft, impeller. Repair to impeller by way of brazing, turning and finishing to proper size. Replacement of worn out pump shaft of 2.5 cusec discharge pump at workshop by new pump shaft by way of turning, threading and finishing to the accurate size as per specification of old broken shaft. Making of new slots for feather keys. Repairs to the pump casing by way of welding and rethreading the damaged studs/bolts holes of pump casing as per the size and specification. P/F of new check nuts, gland bushes, shaft protection sleeves, impeller wearing rings, bearings as per sample and new CI gland plates. Complete assembly of the pump set after complete repairs. The job includes replacement of gland packing, oiling and greasing including cost of material and labour charges and fitting and reinstallation at the base frame, giving all electrical connections and testing of pumping set of unit No.I at site on full and no load.

Dismantling of the damaged 12.5 HP motor stator at workshop for extraction of burnt/damaged windings, cleaning of stator slots and complete rewinding of the motor with new copper wires of requisite gauge and specifications. Providing and fitting of new insulation, packing material, then varnishing with superior quality varnish and drying in oven in controlled temperature. The job includes repairs to the motor body and terminal box by way of drilling of oversized holes in the body of the motor and rethreading and fitting of terminal box on the motor body. Complete job including cost of material and labour charges with hiring charges of tools and tackles. Job also includes repairs to the coupling pulley set of unit-I by way of welding, machining of bore and key way on either side of the shaft(pump and motor side). Resizing of the coupling bolt holes by way of welding and drilling to proper size. Complete job including cost of material and labour charges. p/f of new nuts, bolts and bushes etc. as required and boring to exact size.

Improvement to electrical substation of 63KVA at LIS chung by way of disconnecting all HT and LTline connectionremoving the top cover of transformer by unscrewing the nut and bolts. Extracting of old damaged HT & LTbush rods. Then P/F of new GT bush rod 03Nos and LT bush rod 04Nos along with required brass nuts & bolts and washers. Repair to burnt ends of cables by way of cutting its burnt ends and then P/F of thimbles 04Nos to LT sides and 03Nos to HT side of appropriate rating/size. Then crimping and insulating properly.Topping up of the transformer by 30 litre t-oil .Assembling back the top cover by P/F of new nuts, bolts and washer required. Connecting all HT & LT line connection to the transformer. The job includes cost of material, charges of skilled labour, testing of the transformer at full load at site

Dismantling of 2” inch dia pipe from the priming pump assembly by way of cutting the damaged/rusted nuts & bolts with the help of gas cutter at LIS Chung. Extraction of old damaged foot valve 2” dia with the help of manual labour. Cutting of the 2”dia foot valve from the pipe with gas cutter. Providing and fitting of 2” dia extension pipe oflenth 5 foot along with flangesto pipe. Providing and fitting of new 2” dia foot valve to the priming unit along with pipe using new nuts, bolts, washers and rubber gasket. Fitting of pipe using new nuts, bolts and rubber gasket. The job includes repairs to priming unit by dismounting the unit and dismantling it from suction and delivery and cleaning the same, providing of gate valve, gland packing& grease. Testing of the priming unit to ensure proper flow and re-welding of the joints in case there is any leakage. The job includes cost of material, hire charges of tools, tackles, skilled/unskilled labour charges and other consumables.

Repairs to 12.5 HP oil immersed starter of pumping unit no I by way of extracting the damaged copper contact points both moving and fixed, thimbles, no volt coil, tripping system , overload relay and replacing the same with new ones. Providing/filling of 7 litres transformer oil for topping up starter. The job includes cost of material, labour charges, installation and testing charges at site.

Rebate on account of old parts

M/S RAGHUNATH MECHANICAL AND ELECTRICAL ENGINEERING WORKS

G S ENGINEERING WORKS