80905 REPAIR MAINTENANCE HT VCBs HT CABLES TRANSFORMERS GODs 2 POLE 4 POLE STRUCTURES DISTRIBUTION LINES SWITCH GEARS AND LT UG CABLES AND OTHER CONNECTED WORKS AT NAVAL AREA AND COAST GUARD AREA UNDER GE HADDO PORT BLAIR

Amount

Excavating in trenches not exceeding 1.5m wide and not exceeding. 1.5m in depth for foundation etc. or for shafts, wells, cesspits, manholes, pier holes etc. n. exc. 10sq.m. on plan and n. exc. 1.5m in depth and getting out in hard/ dense soil all as specified.

Excavating in trenches not exceeding 1.5m wide and exceeding 1.5m depth and not exceeding 3.0m depth for foundation for poles etc. or for shafts, wells, cesspits, manholes, pier holes etc. n. exc. 10sq.m. on plan and n. exc. 1.5m in depth and getting out in hard/ dense soil all as specified.

Returning, filling in including spreading leveling watering and well ramming in layers not exceeding 25cm in any type of soil.

Removing excavated materials to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.50m above the starting point.

Material & Labour for carrying out repairs to HT 11 KV four pole structure of 11 metre height Steel/ RCC poles including replacement of all perished ACSR conductor (Beaver) of Horizontal bus bar and down conductors for 4 Nos/ 03 Nos/ 02 Nos. GOD system on structure, jumpering and binding with aluminium conductor to the post insulators/ pin insulators and providing PVC sleeves to the down conductor with colour code R, Y & B including renewal of all rusted nuts & bolts all as specified and as directed by Engineer-in-Charge.

All as per item No. 5 herein before but for two pole structure complete all as specified and as directed by Engineer-in-Charge.

Supply & fix Pin type, composite silicon rubber polymeric type insulator 150mm height, 150mm dia for 11000 volts grade, 5 kN with ECR glass rod, forged steel top and bottom, silicon rubber housing and weather sheds, including one galvanized mild steel spindle, galvanized iron washer, spring and one galvanized iron nut all as specified and as directed including taking down existing unserviceable insulator. [Make: GK Electricals/ BHEL/ Jayshree/ WS Industries/ Southern Insulators/ Mysore/ ABB]

Material & Labour for Cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of paint complete including dismantling existing rusted/ unserviceable cross arms.

Supply & fix long rod insulator, composite silicon rubber polymeric type 290mm height, 100mm dia for 11000 volts grade, 45 kN with ECR glass rod, forged steel tongue and cleaves, silicon rubber housing and weather sheds all as specified and as directed including taking down existing unserviceable disc type insulator. [Make: GK Electricals/ BHEL/ Jayshree/ WS Industries/ Southern Insulators/ Mysore]

Taking down HT 11 KV grade triple pole gang operated Air break switch from 4 pole/ 2 pole structure and Supply & fix new gang operated Air break switch (GOD) HT 11 KV of 200 Amps rating, out door type suitable for vertical mounting, fixed type complete with 3 Nos. silicon rubber polymeric insulator per phase all as specified and all as specified and as directed by Engineer-in-Charge.[Make: GK Electricals/ Pactil/ Southern Switchgears/ Jaipuria/ Mysore Electrical Industries/ HEI]

Taking down HT 11 KV drop out fuses from 4 pole/ 2 pole structure and Supply & fix New single phase drop out fuse 11 KV, 200 Amps rating with single silicon rubber polymeric insulator complete all as specified and directed. [Make: GK Electricals/ ABB/ AREVA/BHEL]

Supply and install lightning arresters expulsion type suitable for 11000 volts complete with all fittings, transmission class, discharge capacity 65 KA including taking down damaged / unserviceable lightning arresters, expulsion type complete with all fittings complete all as specified and as directed by Engineer-in-Charge. [Make: Oblum/ BHEL/ HTGS/ Jaipuria Brothers]

Material & Labour for PCC 1:2:4 type B1 using 20mm graded stone aggregate as in coping of pole all as directed including use & waste of necessary form work including weathering, slightly rounded or chamfered angles and throating all as specified and all as specified and as directed by Engineer-in-Charge.

Material & Labour for plain cement concrete 1:3:6 type C2 (using 40mm graded stone aggregate) as in foundations, filling and mass concrete for poles underneath 2pole/ 4pole structure, feeder pillar boxes etc, all as specified and all as specified and as directed by Engineer-in-Charge.

Material & Labour for Earthing complete with galvanized steel earth plate electrode 60cm x 60cm x 6mm thick, buried directly in ground (earth pit not less than 2.25m deep below ground level) with top edge of earth plate not less than 1.5m below normal ground level, connected to galvanized earth strip of 32X6mm size by means of bolts, nuts, check nuts and washers of galvanized iron or steel and connected from earth plate electrode to main switch board/ earthing test point including watering arrangement with PCC 1:3:6 type C1 chamber, MS funnel, wire gauge, 50mm thick precast RCC cover in Type B1, including necessary excavation in any type of soil, returning, filling in, removal of surplus soil to a distance n.exc 50m, charcoal and salt complete all as shown in electrical plate No. 3 of Schedule Part-I 2009 and connected to earthing test point all as specified or indicated and testing on completion all as specified and as directed by Engineer-in-Charge.

Supply & fix Earth continuity conductor or main earthing lead of GI earth strip of size 32x6mm fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required, fixed with necessary clamps and nuts, bolts etc. including taking out unserviceable strip all as specified and as directed by Engineer-in-Charge.

Material & Labour for Earthing complete with copper earth plate electrode 60cm x 60cm x 3.15mm thick, buried directly in ground (earth pit not less than 2.25m deep below ground level) with top edge of earth plate not less than 1.5m below normal ground level, connected to copper earth strip of 20x3mm size by means of bolts, nuts, check nuts and washers of copper and connected from earth plate electrode to main switch board/ earthing test point including watering arrangement with PCC 1:3:6 type C1 chamber, MS funnel, wire gauge, 50mm thick precast RCC cover in Type B1, including necessary excavation in any type of soil, returning, filling in, removal of surplus soil to a distance n.exc 50m, charcoal and salt complete all as shown in electrical plate No. 3 of Schedule Part-I 2009 and connected to earthing test point all as specified or indicated and testing on completion

Supply & fix Earth continuity conductor or main earthing lead of copper earth strip of size 20x3mm fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required, fixed with necessary clamps and nuts, bolts etc. including taking out unserviceable strip all as specified and as directed by Engineer-in-Charge.

Material & Labour for isolating, cutting, removing the existing damaged end termination and Supply & fix outdoor end termination, Heat shrinkable type suitable for HT UG cable, XLPE insulated of size 3 core x 70 to 95 sq.mm, 11KV [Earthed] grade including preparation complete all as specified and as directed by Engineer-in-Charge. [Make: M-Seal/ Super seal/ 3M/ Denson/ Raychem]

All as per item no.19 here in above but for HT UG cable of size 3 core x 120 to 240Sqmm, 11KV grade complete all as specified and as directed by Engr-in-charge. [Make: M-Seal/ Super seal/ 3M/ Denson/ Raychem]

Material & Labour for isolating, cutting, removing the existing damaged end termination and Supply & fix indoor end termination, Heat shrinkable type suitable for HT UG cable, XLPE insulated of size 3 core x 70 to 95 sq.mm, 11KV [Earthed] grade including preparation complete all as specified and as directed by Engineer-in-Charge. [Make: M-Seal/ Super seal/Denson/ Raychem/3M]

All as per item no.21 here in above but for HT UG cable of size 3 core x 120 to 240Sqmm, 11KV grade complete all as specified and as directed by Engr-in-charge. [Make: M-Seal/ Super seal/ 3M/ Denon/ Raychem]

Material & Labour for cutting, removing the existing damaged joint and Supply & fix straight through joint heat shrinkable type suitable for HT UG cable, XLPE insulated of size 3 core 70 x 95sq.mm, 11KV [Earthed] grade including preparation complete all as specified and as directed by Engineer-in-Charge [Make: M-Seal/ Super seal/Denson/ Raychem/3M]

All as per item no.23 here in above but for HT UG cable of size 3 core x 120 to 240Sqmm, 11KV grade complete all as specified and as directed by Engr-in-charge. [Make: M-Seal/ Super seal/ 3M/ Denon/ Raychem]

Supply, lay, testing of HT UG cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor 11000 Volts (earthed) grade of size 3 core 120sq.mm including disconnecting and taking out the existing unserviceable HT cable from trenches all specified and all as specified and as directed by Engineer-in-Charge. Note: (i) Necessary test results like continuity test, megger tests, shall be submitted to Engineer-in-Charge before the cable is laid. (ii) Excavation earth work will be measured and paid separately.

Supply and laying in trenches or in cable ducts, DWC HDPE pipe of size 120mm (OD) x 103.5mm (ID) along with connected accessories like couplers, bends, end caps etc. for cable protection all as specified and all as specified and as directed by Engineer-in-Charge. [Make: Rex Poly Extrusion Ltd/ Tirupati Plastomatics Pvt Ltd.]

Taking up the corroded/ deteriorated GI pipe from the road crossings/ obstructions and supply & laying GI Pipe 100mm dia medium grade all as specified and as directed by Engineer-in-Charge. [Make: Tata/ Prakash/ Jindal/ Zenith/ Bansal]

Supply and replace silver danger notice plate of 1.6mm thick mild steel sheet, vitreous enameled white, with letters, figures and conventional skull and bones in signal red colour and fixed with MS clamps, bolts and nuts of approved size, for HT 25x20cm sizeall as specified and as directed by Engineer-in-Charge.

Supply, laying, testing and commissioning of LT XLPE insulated, armoured heavy duty electric aluminium conductor cable 1100 Volts grade of size 3.5 core x 95 sq.mm. (laid in trenches, ducts, pole, wall etc.) including taking out old unserviceable LT cable from trenches/pole/ducts etc. all as specified and as directed by Engineer-in-Charge: Note: (i) Necessary test results like continuity test, megger tests, shall be submitted to Engineer-in-Charge before the cable is laid. (ii) Excavation earth work will be measured and paid separately.

All as per Item No. 29 herein before but cable of size 3½ core x 120sq.mm

All as per Item No. 29 herein before but cable of size 3½ core x 240sq.mm

All as per Item No. 29 herein before but cable of size 3½ core x 400sq.mm

Material & Labour for heat shrinkable type straight through joint suitable for LT UG cable 1100 Volts grade, XLPE insulated of size 4 core x 16sq.mm complete all as specified and all as specified and as directed by Engineer-in-Charge including cutting and removing existing damaged joint. [Make: Densons/ Super seal/ 3M/ Raychem]

All as per Item No. 33 herein before but cable of size 3½ core x 95 to 240sq.mm

All as per Item No. 33 herein before but cable of size 3½ core x 300 to 500sq.mm

Taking down the damaged fuse wire and supply and fix copper fuse wire of any guage/ rating of existing size complete all as specifide and as directed by Engineer-in-Charge.

Supply and lay graded stone aggregate of 63mm size, spread and leveled around 4 pole/ 2 pole structure/ transformer yard all as specified and all as specified and as directed by Engineer-in-Charge.

Material & Labour for mild steel framed brackets of angles or tees with web and flanges cut to shape, drilled and countersunk for screw, including bending and welding angles, as necessary, gusset plates, riveting, etc. n.exc. 10 kg each brackets, conforming to Fe.290.Gde-E-165 inclusive of one primer coat, one under coat and one finishing coat of synthetic enamel paint complete all as specified and as directed including dismantling existing brackets.

Taking out old unserviceable voltmeter 0 to 500 volts and replacing with new Digital voltmeter of same capacity suitable for existing panel board complete all as directed by Engr-in-charge

Taking out old unserviceable ammeter 0 to 2500 Amps from panel board and replacing with new Digital ammeter of same capacity suitable for existing panel board complete all as directed by Engr-in-charge

Supply & fix MCCB 4 Pole, 250 Amps, 36 kA, 415 volts, 50 Hz adjustable over load 70-100% with thermal magnetic release Ics=100%Icu, connecting up with necessary spreader links complete all as directed including disconnecting & taking down existing unserviceable switchgear. [Cat No. CM98065OOPO of make: L&T or equivalent in Schneider/ ABB/ Legrand]

Decarbonizing/ cleaning complete LT panel board/ pillar boxes of 230/380/ 415 Volts, 3 phase bus bar chamber with electrical connections complete, removing the complete bus bar from the bus bar chamber, cleaning with CTC and ensure proper decarbonizing including new bakelite of adequate size wherever required, re-fixing the same after applying Becktrol (Red) solution to the spout, checking all the connections, tightening the nuts, bolts, thimbles for incoming and outgoing system complete including renewal of defective/ rusted bolts, nuts, insulators etc. all as specified and as directed by Engineer-in-Charge.

Disconnecting and taking down existing LT air circuit breakers of capacities from 400 Amps to 4000 Amps from panels, carrying out servicing comprising checking/ repair of mechanical system of ACB, checking/ repair of the manual closing/ tripping of breaker, lubricating the moving parts and refixing the same, re-orientation and connecting up complete all as directed.

Removing old burnt/ damaged end termination for LT cable 1100 Volt grade, 3½ core 70 to 150sq.mm and supply and making new end termination with suitable size of lugs duly crimped after isolating supply to transformer/ LT pillar box/ LT panel and disconnecting burnt/ faulty cable from the bunch of cable gland and reconnecting the cable with new nuts, bolts and washers of nickel chromium plated applying petroleum jelly after end termination, testing and commissioning complete all as specified and as directed by Engineer-in-Charge

All as per Item No. 44 herein before but for cable of size 3½ core x 185 to 300sq.mm

All as per Item No. 44 herein before but for cable of size 3½ core x 400 to 500sq.mm

Material & Labour for preparation of old painted surfaces of LT panels by cleaning/ rubbing with coarse cloth/ wire brushes to remove dust deposits, oil, grease and repainting by applying one spray coat of synthetic enamel paint without disturbing/ damaging the electrical net work system/ equipment including marking of details of capacity/ rating/ incoming/ outgoing in capital English alphabets all as specified and as directed by Engineer-in-Charge.

Supply & fix in repairs LED Indication Lamps 22.5mm dia R, Y, B 240 Volts DC/AC Neon type. [Make: Kaycee/ Teknik/ L&T/ Vaishnov/ AE/Binay]

Supply & fix in repairs epoxy insulators suitable for conical/ single bus bar system for LT 415 volts panel board/ pillar box/ cope point, fixed to bus chamber for bus bar support including nuts, bolts, washers all as specified and as directed by Engineer-in-Charge.

Material & Labour for preparation of old decorated surfaces of walls of transformer plinth and applying one coat of cement based paint complete all as specified and as directed by Engineer-in-Charge.

Disconnecting and taking out existing old unserviceable aluminium bus bar of any size or shape and supply and fix new aluminium bus bar of suitable size and capacity to suit the existing requirement with proper insulators for mounting including reconnecting the electric cables complete all as specified and as directed by Engineer-in-Charge.

Disconnecting and taking out existing old unserviceable copper bus bar of any size or shape and supply and fix new copper bus bar of suitable size and capacity to suit the existing requirement with proper insulators for mounting including reconnecting the electric cables complete all as specified and as directed.

Material & Labour for fabrication/ repair of LT panel door covers made out MS Sheet 3mm thick necessary folding jointing as suitable at site with existing panel board indoor/Outdoor including necessary welding, hinges and supports complete all as specified and as directed by Engineer-in-Charge. Note: Transportation charges for electric/ gas welding machine from workshop to site and back shall be included in the rate quoted

Cutting and cleaning the tree branches around the HT/LT poles/Over head line upto 3 mtr from either side of pole/ over head line and clear the site and throw away the branches to a distance all as specified and as directed by Engineer-in-Charge.

M&L for preparation of old painted steel surfaces of 4 pole structure including brackets, clamps, channels and cross arms by cleaning of oils, lubricants, grease etc. complete above PCC coping and applying two coats of aluminium paint on surfaces 1m above PCC coping, applying two coats of synthetic enamel paint in zebra pattern with black & yellow colour combination up to 1m height above PCC coping; writing MES No. of poles (Number size shall be 25mm and lettering shall be 40mm) complete including applying two coats of white wash on exposed concrete surfaces of coping to poles duly preparing the surfaces all as directed by Engineer-in-Charge.

All as per Item 55 herein before but for two pole structure complete all as specified and as directed by Engineer-in-Charge.

M&L for cable route indicator made of cast aluminium disc 200mm dia, 12mm thick with inscription casting as HT cable fixed to MS angle of size 40x40x6mm, 600mm long with bolts & nuts, duly grouted in PCC 1:3:6, type C2 complete including necessary excavation and earth work all as directed including taking up existing indicators complete all as specified and as directed by Engineer-in-charge.

S&F changeover switch 400 Amps, 415V, AC 23A, 4 Pole, open execution type fixed in the existing panel including connecting up complete all as directed including disconnecting & taking down existing unserviceable switchgear. [Cat No. CO44000OOOO of make: L&T or equivalent in Schneider/ ABB/ Legrand]

Cutting bushes, levelling the area around E/M installation such as sub stations, 4/2 pole structure etc. including surface excavation not exceeding 30cm deep and averaging 15cm deep and averaging 15cm deep and getting out roots, jungles etc. throw away not less than 50 mtr from the site and making good all as specified and as directed by Engineer-in-Charge.

M&L for writing SM No MES No. on plants and machinery with synthetic enamel paint/ stickering with letters of height 8cm complete all as specified and as directed by Engineer-in-Charge.

Material and labour for preparation of floor and painting with synthetic enamelled paint of red/black colour where necessary all as directed by Engr-in-charge

Supply, lay, testing of HT UG cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor 11000 Volts (earthed) grade of size 3 core 95sq.mm including disconnecting and taking out the existing unserviceable HT cable from trenches all as specified and as directed by Engineer-in-Charge. Note: (i) Necessary test results like continuity test, megger tests, shall be submitted to Engineer-in-Charge before the cable is laid. (ii) Excavation earth work will be measured and paid separately.

Supply, lay, testing of HT UG cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor 11000 Volts (earthed) grade of size 3 core 185sq.mm including disconnecting and taking out the existing unserviceable HT cable from trenches all as specified and as directed by Engineer-in-Charge. Note: (i) Necessary test results like continuity test, megger tests, shall be submitted to Engineer-in-Charge before the cable is laid. (ii) Excavation earth work will be measured and paid separately.

Shifting of 4 pole structure (PCC Poles/Swage Poles) by disconnecting all electrical connections, cables, GODs, Fuse units, Channels, angles, clamps, GODs, Fuse units with new nuts, bolts and washers including replacement of rusted nuts, bolts, washers and new ACSR conductor for jumpers and connections, and applying two coats of aluminium paint on surfaces 1m above PCC coping, applying two coats of synthetic enamel paint in zebra pattern with black & yellow colour combination up to 1m height above PCC coping; writing MES No. of poles complete including applying two coats of white wash on exposed concrete surfaces of copping to poles duly preparing the surfaces including dismantling and taking out old damaged poles from the site complete all as specified and directed.

All as per item No.64 above but for 2 pole structure complete all as specified and as directed by Engineer-in-Charge.

Taking out LT panel/junction box of any size by disconnecting all incoming and outgoint cables including breaking of PCC foundation for transporting and fixing in other place safely as directed including re-fixing of LT panel board with new PCC foundation, angle supports, nuts, bolts and washers including transportation like crane, truck etc without distrubing existing electrical system complete all as specified and as directed. Note:- (i) Necessary excavation earthwork, PCC for new place work will be measured and paid seperately. (ii) The cost of braking PCC and removing of Poles is deemed to be incuded in the Quoted rate. (iii) The cost of transportation for crane, truck etc to shift the removed panels from one pleace to another place is deemed to be included in the Quoted rate.

Disconnecting and taking down unserviceable LT current transformer from existing bus bar / LT cable of any size including disconnecting of cable terminals in LT panel and S&F CTs of ration 1000 / 5A to 2000 / 5 Amps, 415 volts, 50 Hz including cable connections, lugs, brass nut & bolts complete all as specified and as directed by Engineer-in-Charge.Make : GE/GEC/KAPPA

Disconnecting and taking down unserviceable CTs from existing bus bar/ LT cable of any size including disconnecting of cable terminals in LT panel and supply and fix CTs of Ratio 800 / 5Amps to 1000/5 Amps, 415 volts, 50 Hz including cable connections, lugs, brass nut & bolts complete all as specified and as directed by Engineer-in-Charge. Make : GE/GEC/KAPPA

Disconnecting and taking down unserviceable CTs from existing bus bar/ LT cable of any size including disconnecting of cable terminals in LT panel and supply and fix CTs of Ratio 200 / 5Amps to 400/5 Amps, 415 volts, 50 Hz including cable connections, lugs, brass nut & bolts complete all as specified and as directed by Engineer-in-Charge.Make : GE/GEC/KAPPA

Opening the shutters of VCB 11 KV 400/630 Amps of any make and model, removing the Breaker from the existing position after disconnecting all the connections from the system, servicing, overhauling of the same, checking of the same for proper operation, spring charge, ensuring control cables are fastened tightly to the terminals, checking any abnormality with PC, VCB, cleaning the surface of the insulators, fasten the bolts, checking and correcting interrupting units, mechanism, linkages etc, fasten the hardware of control wiring, check that the split pins, circlips, dowel pins etc. have not come out and are intact, lubricate the mechanism of moving parts by Castrol all purpose grease or equivalent, check that the contact erosion is within limit including opening of the shutters properly, replacing of the trip catch, roller, holding catch, stopper, close push button, closing cum reassembling, reconnecting of the breaker for smooth functioning all as directed.

Decarbonizing/ cleaning complete HT 11KV, 3 phase independent bus bar, bus bar chamber of HT panel, electrification connection complete, HT VCB switch gear arrangement incoming and outgoing installed in sub-stations after removing the complete bus bar spout, circuit spout from the bus bar chamber, cleaning with CTC and ensure proper decarbonizing, re-fixing the same after applying Becktrol (Red) solution to the spout, checking all the connections, tightening the nuts, bolts, thimbles for incoming and outgoing system complete all as specified and as directed by Engineer-in-Charge.

Taking out old unserviceable closing coil assembly 110V DC, Supply and fix closing coil assembly 110V DC, for VCB complete all as specified and as directed by Engineer-in-Charge. Make : Alstom

Taking out old unserviceable tripping coil assembly, Supply and fix tripping coil assembly 110V DC, for VCB complete all as specified and as directed by Engineer-in-Charge. Make : Alstom/ English Electric

Supply, install & testing 11 KV single phase resin cast indoor current transformer, copper wound, primary system voltage 11 KV, 50Hz, 200-100/5-5A, as per IEC: 60044-1-2003 complete including CT wiring with primary and secondary injection kit, identification to the base and connecting links to HT OCB/ VCB to match with the system all as specified and as directed including taking down existing unserviceable CT. [Make: Crompton Greaves/ Kappa/ Alsthom or equivalent]

Calibration of IDMT relays fixed on HT 11KV panel, setting the relays for the fault levels for primary injection method system as directed by Engineer-in-charge and testing and operation of vacuum circuit breaker after calibration of relays by simulating different types of faults including necessary wiring as required complete all as specified and as directed by Engineer-in-Charge. Notes :- (i) Primary & secondary injection kit shall be arranged by the contractor (ii) DC Supply for relay testing shall arranged by the contractor. (iii) The contractor shall prepare the relay adjustment and tripping timing chart in the follow up fashion and submit to Engineer-in-Charge

M&L for servicing of Ring main unit HT 630 Amps, 11KV, 50 Hz by removing both the sources of supply power cable carefully, checking its cable ends; removing the body cover of RMU; opening its contact blade, moving and fixed contacts, repair of moving / fixed parts, the condition of contact blades and lubricate the contact blades; repair of its drive mechanism, refixing the contact blades, moving & fixed contact, refixing its body covers, refixing the RMU with both ends of cables; necessary testing and charging the RMU complete all as specified and as directed by Engineer-in-Charge.

S&F in repairs Vacuum interrupter tube Type: WL-34599 C 1 of 800A capacity frequency 50 Hz, STC 25KA for 3 secs 12KV designed to withstand up to 28/75KV complete all as specified and as directed by Engineer-in-Charge. [Make: Crompton Greaves SR K11821 or equivalent in make: Biecco Lawrie Ltd]

M&L for online centrifuging (filtration/ dehydration) of transformer oil including checking dielectric strength of oil before and after filtration for transformers located under GE Haddo area with suitable machine having filtration, heating and pumping facility to improve the dielectric strength/ insulation value of oil. Notes :- (i) Di-electric strength of oil after filtration/ dehydration shall not be less than 60 KV/min. (ii) The contactor shall take shut down orders in writing from Engineer-in-charge before commencement of the work. (iii) The contractor shall ensure no wastage of transformer oil. (iv) The di-electric strength of oil shall be tested before & after filtration and test results shall be submitted to Engineer-in-Charge. (v) The contractor shall ensure that the conservator tanks are full to its level before starting the dehydration

M&L for preparation of old painted surfaces of floor mounted inddor/ outdoor type transformer from 100 KVA to 500 KVA capacity by cleaning/ rubbing with coarse cloth/ wire brushes to remove dust deposits, oil, grease and repainting by applying one spray coat of synthetic enamel paint without disturbing/ damaging the electrical net work system/ equipment including marking of details of capacity/ rating/ incoming/ outgoing in capital English alphabets all as specified and as directed by Engineer-in-Charge.

All as per Item No. 79 herein before but from 750KVA to 2000KVA.

S&F in repair silica gel breather assembly transparent type with first fill of silica gel suitable for 2000 KVA transformers complete including connecting with proper rubberized gasket and necessary suitable GI fittings of existing type for fixing the assembly complete all as specified and as directed by Engineer in Charge. Make : Patel Electrical Industries or equivalent recommende by OEM

Supply, filling and for topping up the transformer with new transformer oil duly filtered with filtration plant. Make : Power Oil Ltd/Savita/Castrol. Note : (a) The transformer oil shall be type EHV confirming to IS - 3351983. (b) Mineral oil grade shall be used. (c ) The transformer oil should have a high dielectric strength not less than 60 KV/Min.

Taking down burnt defective drawnout/inlet Valve (Brass 1 1/2" size) and supply and fixing new drawn out/Inlet valve (brass 1 1/2") suitable for any make of 100 to 2000KVA Transformer all as specified and as directed by Engineer-in-charge.

Taking down defective unserviceable LT bush porcelain insulator and supply and fix new LT bush porcelain insulator with oil seal for transformer outdoor/indoor up to capacity of 500 KVA including opening the top cover for fixing of LT Bush if necessary complete all as specified and as directed by Engineer-in-Charge.

All as per Item No. 84 herein before but from 750KVA to 2000KVA.

Taking down defective unserviceable HT bush porcelain insulator and supply and fix new HT bush porcelain insulator for transformer outdoor/indoor up to 500KVA including opening the top cover for fixing of LT Bush if necessary complete all as specified and as directed by Engineer-in-Charge.

All as per Item No. 86 herein before but from 750KVA to 2000KVA.

M&L for isolating the HT supply of transformer, disconnecting HT and LT connections of transformer by opening clamps, bus bar extension and isolating the cables from transformer, outdoor of 100 to 2000 KVA capacities, checking of transformer pressure release valve, oil condition and carrying out tests such as HV/LV megger test, ratio test, magnetic balance test, short circuit test including opening the inspection cover/top lid after drain out of oil as required to check the lead condition from winding to bus rods including necessary soldering/jointing, fixing of new sleeves etc, and charging of transformer and making all necessary connections / assembly & control circuits all as specified and directed by Eng-in-Charge.

Taking down unserviceable sheet gasket (Cork sheet), Supply and fix synthetic rubberized cork sheet gasket 6mm thick 2' x 3' size approx sheet thick as required at site for top cover HT/LT bushes at places existing and tighting all the bushings and top cover to avoid any oil leakages of capacity 100 KVA to 500 KVA complete all as specified and as directed by Engineer-in-Charge.

All as per Item No. 89 herein before but from 750KVA to 2000KVA.

Disconnecting defective out door/indoor transformers, 11KV/433 V of various capacities up to 2000KVA from HT/LT sides taking down transformer oil completely, storing oil in suitable container (to be provided by the contractor), lifting the top cover and core assembly carefully and checking the conditions, refilling the transformer Coil completely after necessary repairs, re-fixing core assembly including fixing the top cover and painting to transformer complete all as specified and as directed by Engineer-in-Charge. Note : (a) Rewinding of transformer shall be measured and paid separately. (b) In case of major repairs/replacement in transformer, which can not be undertaken at site, the transformer shall be shifted to civil workshop and refixed at site after rewinding by Hydra and connected accessories (complete transformer). (c) Dismantling of core and repairs shall be measured and paid separately. (d) Rate quoted shall be deemed to be inclusive of Shifting of transformer to workshop and back. (e) Complete gaskets, nuts and bolts shall be replaced by the contractor and the quoted rate is deemed to be included.

M&L for lifting of transformer core of capacity 100 to 500 KVA and keeping the core inside oven chamber to remove moisture and increasing of the insulation value of core and drying the core assembly for minimum 3 days at a temp of 120°C. Note :- (a) Cost for lifting/lowering the core of transformer by crane is inclusive. (b) Labour for fixing the connection/removal of connection inside the heating chamber is inclusive. (c) Power consumption for heating core for improving insulation value is inclusive. (d) Temperature 120°C to be maintained and inclusive in the rate quoted.

All as per item no 92 above but of capacity 750 KVA to 2000 KVA.

Taking down burnt defective high tension copper coil of Transformer and supply and fix new HT copper coil made out of proper/ required as per the existing size copper wire enameled of high quality matching with the existing impedance and pre- insulation all as specified and directed. Note : (a) The cost of coil shall be inclusive of varnish sleeving of insulating material. (b) Cost of taking down the clamps, upper channels and core & HT links and re-clamp, positioning with separators, brazing etc completely shall be deemed to be included in the quoted rate.

Taking down burnt defective Low tension copper coil/copper strip of Transformer/DG Set alternator and supply and fix new LT copper coil/copper strip of existing size made out of proper/ required copper wire enameled of high quality matching with the existing impedance and pre- insulation all as specified and as directed by Engineer-in-Charge. Note : (a) The cost of coil shall be inclusive of varnish sleeving of insulating material. (b) Cost of taking down the clamps, upper channels and core & LT links and re-clamp, positioning with separators, brazing etc completely shall be deemed to be included in the quoted rate.

Taking down unserviceble tinned copper bus bar of various sizes from HT/LT side cable bushing rods from the transformer of 500KVA to 2000KVA capacity and supply and fix electrolyte tinned copper bus bar of suitable size and length including making holes as required at site to the transformer LT/HT side cable bushing rods all as specified and as directed by Engineer-in-Charge.

Supply and fix offload tap changer assembly suitable for 11/433KV, any make upto 500KVA transformer with 7 tapping position including opening top cover, conservator etc as fixed against repairs all as specified and as directed by Engineer-in-Charge.

All as per Item No.97 above but of capacity 750 - 2000 KVA.

Dismantling of existing cement mortor, taking down the existing transformer platform complete all as specified and as directed by Engineer-in-Charge.

Material and labour for air termination single pointed aluminium rod 12 mm dia, 300mm long and taking down the unserviceable/broken one including removing from site all as specified and as directed by Engineer-in-Charge.

Material and labour for aluminium strip of size 25 x 3.15 mm with saddle or fixed with screws etc., for roof conductor and down conductor, above ground including taking down unserviceable/broken aluminium strip all as specified and as directed by Engineer-in-Charge. Note : Fixing of insulators will be paid separately.

Material and labour for test point terminal block made of gun metal or phosphorus bronze of size 75 x 25 x 10 mm drilled and screwed including 3 Nos. 8 mm dia, 25 mm long hexa headed screwed including taking down unserviceable one and remove from site all as specified and as directed by Engineer-in-Charge.

M&L for shifting of Transformer of capacity upto 2000KVA from MES power house to variours substations/transformer locations at haddo area by road and removing the faulty transformer from the plingth and fixing/errecting of the healthy tansformer with the hydra/crane support, making necessary HT/LT cable connections, earth connections and restoration of power supply all as specified and as directed by Engineer-in-Charge.

BABBAR ENGINEERS

PTech Engineers

MOHAN SINGH INFRASTRUCTURE(INDIA) PRIVATE LIMITED

Tropical Refrigeration