REPAIR/ MAINTENANCE OF DISTRIBUTION TRANSFORMERS, HT VCBS, RING MAIN UNIT, HT CABLES AND CONNECTED ITEMS UNDER GE (AF) PALAM, DELHI CANTT-10

Amount

Excavation in trenches in soft/loose soil not exc 1.50 m wide and not exc. 1.5 m depth and getting out for taking out/laying cable, pole & stay etc including taking out old precast concrete cover complete all as specified and directed by Engineer-in-Charge..

Returning, filling in, including spreading levelling, watering and well ramming in layers not exc. 25 cm thick complete all as specified and directed by Engineer-in-Charge.

Removal of excavated surplus soil to a distance not exc. 50 mtr away and depositing where directed at a level not exc 1.5 mtr above the starting point complete all as specified and directed by Engineer-in-Charge.

Material & Labour for sand cushioning to underground cable provided with layer of sand (8cm deep before laying the cable and 15 cm deep after laying the cable ie total 23 cm) and after punning down sand cushioning will be 18 cm complete all as specified and directed by Engineer-in-Charge. Note : 18 cm thick only will be considered for payment purpose.

Material & Labour for precast concrete cover class HV type 1, flat size 300mmx180mmx40mm laid in trenches for cable protection complete all as specified and directed by Engineer-in-Charge.

Re-Laying only old but serviceable precast concrete cover class HV type, flat size 300 mm X 180 mm X 40 mm in trenches for cable protection with cable cover retrieved from srl No 1 here in before complete all as specified and directed by Engineer-in-Charge.

Supply, laying testing and commissioning in replacement of cable XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavyduty) with stranded aluminium conductor, 11000 volts, grade of size of cable 300 sqmm 3 core suitable for earthed system including taking out unserviceable cable as in trenches /passing through pipes/ on poles, etc complete all as specified and directed by Engineer-in-Charge. Note :- ( Excavation & Earth work, Sand cushioning and precast concrete cover shall be measured and paid separately under relevant items of Sch. ‘A’).

All as per item No 7.00 here in before but size 240 sqmm 3 core complete all as specified and directed by Engineer-in-Charge.

All as per item No 7.00 here in before but size 185 sqmm 3 core complete all as specified and directed by Engineer-in-Charge.

All as per item No 7.00 here in before but size 120 sqmm 3 core complete all as specified and directed by Engineer-in-Charge.

All as per item No.7here in before but size 95 sqmm 3 core complete all as specified and directed by Engineer-in-Charge.

Material and labour for defect rectification of HT/LT cable laid in trenches by locating fault with the help of electronic fault locating machine comprising of surge generator pulse, ECHO fault locator with high frequency distance calculator etc. including and additional excavation in normal alluvial strata required for exposing the cable fault ; removal of deteriorated portion of cable treating of cable and keeping the same ready for jointing work for cable of size up to 300 Sqmm. The fault locating equipments will be brought to site within an hours of instruction from Engineer-in-Charge and fault shall be rectified within 90 mins overall. Note : (i) Recovery at the rate of Rs 2000 per hour will be levied for non rectification of faults. (ii) Cost of excavation earth work, refilling etc shall be included in the quoted rate by the contractor.

Supply and jointing in replacement straight through heat shrink type joint complete with jointing material suitable for HT 11KV XLPE cable of size 240- 300 Sqmm 3 core complete all as specified and as directed by Engineer-in-Charge

All as per item No 13 here in before but suitable for cable size 150- 185 Sqmm complete all as specified and directed by Engineer-in-Charge.

All as per item No 13 here in before but suitable for cable size 95 -120 Sqmm complete all as specified and directed by Engineer-in-Charge.

Supply and jointing in replacement heat shrinkable end termination indoor/outdoor joint with jointing material suitable for HT 11 KV XLPE cable of size 240-300 sqmm 3 core complete all as specified and as directed by Engineer-in-Charge.

All as per item No 16.00 here in before but for size 120-185 Sqmm complete all as specified and directed by Engineer-in-Charge.

All as per item No 16.00 here in before but for size 50-95 Sqmm complete all as specified and directed by Engineer-in-Charge.

Repair and servicing of VCB 630/800 Amps 11 KV from the cabinet and opening top cover, de-carbonizing moving and fixed contacts if required, lubricating, inspecting the wiring of Micro processor EF/OC relay, tripping coil electrical and checking for manual/auto tripping system complete and placing back the breaker trolley in its original position all as specified and as directed by Engr-in-Charge. In case of VCB fault occurs will be rectified within an hour of instruction from Engineer-in-Charge and fault shall be rectified within 90 min overall. Note: (i) The various unsv items required to be replaced shall be paid separately under item No. 20 to 29 (ii) Calibration of relays shall be paid seperately under item No. 27. (iii) Recovey at the rate of Rs 2000/- per hour will be levied for non rectification of faults.

Supply only for replacement of fixed contact block complete suitable for 630/800 Amps, 11 KV HT VCBs all as specified and directed by Engineer-in-Charge.

Supply only for replacement of moving contact block complete suitable for 630/800 Amps 11 KV HT VCBs all as specified and directed by Engineer-in-Charge.

Supply only for replacement of mechanical castle interlock assembly with key suitable for HT 11 KV VCB of rating 630/800 Amps complete all as specified and directed by Engineer-in-Charge.

Supply only for replacement of closing coil assembly 230 volts AC/ 24 volts DC, all as specified and directed by Engineer-in-Charge.

Supply only for replacement of Tripping coil with plunger assembly 230 volts AC/24V DC, all as specified and directed by Engineer-in-Charge.

Supply only for replacement of closing coil plunger with 24 volts DC, all as specified and directed by Engineer-in-Charge.

Supply only for replacement of spout bushing 11 KV for VCB all as specified and directed by Engineer-in-Charge.

M & L for calibration of microprocessor E/F and O/C relay of VCB complete and calibrating with portable relay test kit to set time and fault level and adjustment of setting with according to load & time with main grid of Sekhawati/ Khyber line for proper functioning complete all as specified and directed by Engr-in-Charge. Note : After Calibration, report to be submitted to GE office.

Supply only in replacment of Vacuum interrupter type WL-33379 (4 inch dia) suitable for HT VCB 630/800 Amps all as specified and directed by Engineer-in-Charge.

Supply only in replacement trip push button suitable for HT 11 KV VCB all as specified and directed by Engineer-in-Charge.

S&F in replacement of indicator lamp LED with holder (R/Y/B in colour) complete all as specified and as directed by Engr-in-Charge.

S&F in replacement of CT operated digital ampere meter 0 to 200 Amps flush pattern square type suitable to mounted on existing HT panel complete all as specified & directed.

S&F in replacement of shunt trip coil 30 volts DC for HT OCB/VCB all as specified and directed by Engineer-in-Charge.

Supply & Fixing in replacement motor and gear assembly 110 volts AC/24V DC UMG-14 type all as specified and directed by Engineer-in-Charge.

Supply & Fix in replacement of isolating contact assembly suitable for 630/800 Amps HT VCBs all as specified and directed by Engineer-in-Charge.

Supplying, installation, testing and commissioning of DC Auxiliary Supply battery charger panel for 11 KV substation equipment having DC-24V. DC Battery charger panel with input voltage 230V AC + 10%, 50 HZ + 5% output with 24V. DC/20Amp FCBC battery charger panel with enclosure of repeated make with 2 Nos. cells of 12V/120AH SMF VRLA battery bank of exide/Amaron/Panasonic make including dismantling of old existing panel complete all as specified and directed by Engineer-in-Charge.

Supply, installations and testing in replacement of voltage transformer (PT) 3 phase, resin type of oil fired 3 limb indoor type primary voltage 11 KV and secondary voltage 110 volts type VA class complete all as specified and directed by Engineer-in-Charge.

Supply & Fix in replacement Digital protective 3 phase over current and earth fault relay for HT 11 KV VCB panel with high set and RS-485 MC61C complete with connection and testing on full load all as specified and directed by Engineer-in-Charge.

Supply & Fix in replacement of Digital protective 3 phase over current and earth fault relay with high set with CT rating 5A 2 NO+2NC model MC61A complete for HT 11 KV VCB panel and connection and testing on full load all as specified and directed by Engineer-in-Charge.

Supply & Fix in replacement of Master trip relay suitable for working voltage 30 Volt DC and connecting the circuit with existing over current and earth fault relays complete all as specified and directed by Engr-in-charge.

S&F in replacement of digital volt meter 0-15 KV PT operated analog type of size 150mmx150mm suitable to mount on existing HT panel all as specified and directed by Engineer-in-Charge.

Supply and fixing in replacement of maintenance free fully charged Nickle cadmium battery 42 Ah, 12 volts complete all as specified and as directed by Engineer-in-Charge.

Repair and Servicing of RMU 3 way/5 way 630/800 Amps 11 KV de-carbonizing moving and fixed contacts if required, lubricating, checking the pressure of SF-6 gas, inspecting the wiring of micro processor EF/OC relay, tripping coil electrical and checking for manual/auto tripping system complete including repair of locking system, if required and placing the SF-6 VCB and isolating unit in its original position all as specified and as directed by Engr-in-Charge. In case of RMU fault occurs will be rectified within an hour of instruction from Engineer-in-Charge and fault shall be rectified within 90 min overall. Note: (i) The various unsv items required to be replaced shall be paid separately under item No. 44 to 53 (ii) Calibration of relays shall be paid separately under item No. 53. (iii) Recovey at the rate of Rs 2000/- per hour will be levied for non rectification of faults.

Supply only in replacement plug in type voltage presence indicator system (VPIS) type WIM for 11 KV, RMU complete all as specified and directed by Engineer-in-Charge.

Supply only in replacement SF-6 Ring Main unit fuse 11 KV by opening fuse canisters of RMU positioned behind interlocking cover complete all as specified and directed by Engineer-in-Charge.

Supply only in replacement terminal contact piece with silicone coupling for SF-6 Ring Main unit 11 KV by opening the terminal cover complete all as specified and directed by Engineer-in-Charge.

Supply only in replacement pressure indicator manometer for SF-6 Ring Main unit 11 KV by opening the front cover complete all as specified and directed by Engineer-in-Charge.:

Supply only in replacement ring type current transformer 100/1 Amps for SF-6 Ring Main unit 11 KV by opening the cable compartment cover of fixed the CT on cable elbow plug/T plug complete all as specified and directed by Engineer-in-Charge.

Supply only in replacement ring type current transformer 50/1 Amps for SF-6 Ring Main unit 11 KV by opening the cable compartment cover of fixed the CT on cable elbow plug/T plug complete all as specified and directed by Engineer-in-Charge.

Supply only in replacement SF-6 gas in safe ring/safe plus by SF-6 gas bottle by removing front cover and on screw manometer and reduction valve and maintained the pressure 14 bar obslute complete all as specified and directed by Engineer-in-Charge.

Supply only in replacement Trifurcation boot 11 KV capacity for cable termination joint of RMU incoming and outgoing terminals complete all as specified and directed by Engineer-in-Charge.

Supply only in replacement HT bushing with gaskit for SF-6 Ring main unit 11 KV complete all as specified and directed by Engineer-in-Charge.

Callibration of microproccessor E/F and O/C relay of RMU complete and calibrating with portable relay test kit to set time and fault level and adjustment of setting with according to load & time with main Tech area power house incl replacement of relay battery for proper functioning complete all as specified and directed by Engr-in-Charge. Note : After Calibration, report to be submitted to GE office.

Supply & Fix in replacement of earth fault protection and indicator relay for Ring main unit including calibrating the relay with existing load and tripping timing complete Make :Crompton Model EMG-1 complete all as specified and directed by Engr-in-Charge.

Disconnecting HT/LT sides of defective transformer indoor/outdoor installed on 2/4 pole structure/PCC foundation of capacity up to 800KVA and then drainage of complete transformer oil, Opening of top cover with due care and removal of all HT/LT winding connections from bushing and then lifting of core by means of tripod and chain pulley with due care for inspection and ascertain it’s serviceability state after keeping it aside. Removal of all sludge and unwanted material from tank and core, lowering of core assembly after carrying out required repairs to the winding and core. In case the repairs which are not possible at site then the transformer has to be taken to the work shop for repairs all as specified and directed by Engineer-in-Charge. Note :- The following items will be measured and paid separately under relevant items of the BOQ (i)The cost of transportation. (ii)The cost of rewinding HT/LT coils (iii) The cost of dehydration/filtration (iv) The cost of transformer oil toping up /replaced any spares required for making transformer serviceable.

Material and labour for replacement of worn out HT copper coils (limb) made out of super enameled insulated copper wire all as per existing size and shape including all insulating, requisite insulating paper/material in each layer of binding, varnishing and baking in vacuum furnace complete all as specified and directed by Engineer in charge.

Material and labour for replacement of worn out LT copper coils made out of super enameled insulated copper strip all as per existing size and shape including all insulating, binding, varnishing and baking in vacuum furnace complete all as specified and directed by Engineer in Charge.

Material & labour for replacement of worn out bushing rod made out of copper/brass with heavy duty double nuts and one washer at both ends suitable for HT side all as exiting size, shape and length suitable for transformers of capacity 100 to 400 KVA all as specified and directed by Engineer-in-Charge.

All as per item No. 58.00 here in before but the transformer of capacity 500 to 800 KVA all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of worn out bushing rod made out of copper/brass with heavy duty double nuts and one washer at both ends suitable for LT side all as exiting size, shape and length suitable for transformer of capacity 100 to 400 KVA all as specified and directed by Engineer-in-Charge.

All as per item No. 60.00 here in before but the transformer of capacity 500 to 800 KVA all as specified and directed by Engineer-in-Charge.

Disconnecting HT/LT sides of defective transformer indoor/outdoor installed on PCC foundation of capacity up to 800KVA and then drainage of transformer oil upto bushing Opening of top cover and find out leakage/seepage of transformer oil from body / fins carrying out required repairs such as replacement of top gasket, HT/LT bushing, bushing gaskets/tap changer and re-filling the transformer oil after repair complete all as specified and directed by Engineer-in-Charge. Note :- Cost of bushing, top cover gasket and tap changer will be measured and paid separately under relevant items of the BOQ.

Material and labour for replacement of worn out rubberized cork sheet 4mm thick for transformer top cover all as required at site and as directed by engineer in charge suitable for transformers of capacity 100 to 400 KVA all as specified and directed by Engineer-in-Charge.

All as per item No. 63.00 above but the transformer of capacity 500 to 800 KVA all as specified and directed by Engineer-in-Charge.

Dehydration/filtration of transformer oil by means of centrifuging machine electrically operated to remove moisture and chemical contains of oil at site of installation of transformer in running condition including testing of transformer oil before and after filtration by means of oil testing machine, keeping the electrodes at 2.5 mm gap and to achieve die electric strength of filtered oil 40 KV and above complete all as specified and directed by Engineer in charge.

Transportation of transformer to workshop from site of installation for repairs including loading and unloading of transformer, and reinstalled the transformer at site from where it was taken for repairs including connecting all HT/LT connections complete all as specified and directed by Engineer in charge.

Supply and topping up/replacing of transformer oil conforming to IS : 335 and with stand dielectric strength of 60 KV (when tested with 2.5 Gap electrode) in transformer complete all as specified and directed by Engineer in charge.

Preparation of old surface of transformer for painting externally including fins/radiators removal of all rust/oil/grease and unwanted material and then two coats of synthetic enamel paint by means of spray gun at site of installation of transformer including writing SM No. & Capacity of transformer complete all as specified and directed by Engineer- in- Charge for transformers of capacity 100 to 400 KVA all as specified and directed by Engineer-in-Charge.

All as per item No. 68.00 here in before but the transformer of capacity 500 to 800 KVA all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of worn out breather with silica gel all as per existing sample suitable for transformers of capacity 100 to 400 KVA all as specified and directed by Engineer-in-Charge.

All as per item No. 70.00 here in before but the transformer of capacity 500 to 800 KVA all as specified and directed by Engineer-in-Charge.

Material and labour for replacement of worn out off load tap changer set and connecting with existing winding to match the ratio of tap position all as per existing sample suitable for transformers of capacity 100 to 400 KVA all as specified and directed by Engineer-in-Charge.

All as per item No. 72.00 here in before but the transformer of capacity 500 to 800 KVA all as specified and directed by Engineer-in-Charge.

Material and labour for oil temperature gauge suitable for transformers all as per existing shape and size for any make and model transformers all as specified and directed incl taking out old gauge all as specified and directed by Engineer-in-Charge.

Dismantling and opening of existing servo voltage stabilizer 100 KVA to 250 KVA with disconnection of all incoming and outgoing connection with taking proper safety measure, drain out insulating oil if reqd and servicing of stabilizer including greasing of the mechanical gear, servicing of motor with replacement of mechanical parts , replacement of all wiring and PCB circuits for maintaining input variation between 340 V to 460 V with output voltage stabilized at 415 with accuracy +(-) 2.5% and speed of correction 8 V per Second replacing the digital voltmeter and Ammeter, auto adjustment setting complete . Note:- The rate quoted against this item shall include:- (i) Testing and adjusting of springs, contacts, all control circuits . (ii) The cost of any minor parts such as springs, nuts, bolts, terminal blocks etc which are not included in the Sch 'A' item. (iii) Any brazing and welding if need to the control system or the body. (iv) Any major repair parts required for repairing shall be measured and paid separately under relevant item of BOQ.

Supply in replacement only Microprocessor based control card suitable upto 250 KVA Make- Volina/AE/Vinitek

Supply only Dimmer stat unit 200 Amps suitable upto 250 KVA Servo stabilizers existing make and model Make- Volina/AE/Vinitek

Supply only Electronic circuit card (PCB) suitable upto 250 KVA Servo stablizers Make- Volina/AE/Vinitek

Material and labour for spreading/ levelling coarse broken stone aggregate of 40 mm size evenly in Switch Yard and surroundings of transformer complete all as specified and directed.

Supply and fixing in replacement cable route indicator made out of pcc 1:2:4 of size length 30 cm , width/thickness- 15 cm reinforced with 8 mm dia at 8 cms centre to centre buried in the ground with suitable PCC work with writing MES HT cable joint complete all as directed.

Supply and fixing in replacement of Danger notice plate of 1.6mm thick mild steel sheet, vitreous enamelled white, with letters, figures and conventional skull and bones in signal red colour and fixed with M.S. clamps, bolts and nuts of approved size, for HT, 25x20cm size

Material and labour for in replacement of earthing complete with copper earth plate electrode 60 cm x 60 cm x 3.15mm buried directly and vertically in ground (earth pit not less than 2.25 m deep below ground level) with top edge of the plate not less than 1.5 m below normal ground level connected to Copper strip 20 x 3 mm as earth lead by means of bolts, nuts, check nuts and washers of galvanised steel and including necessary earth work execution in any type of latent rock, PCC 1:3:6 type C2 chamber and chamber cover 50mm (PCC 1:2:4) with 8 mm dia CTD reinforcement watering pipe 20mm dia GI, protection pipe for copper strip 40mm dia GI light grade, salt, coal, magnesium sulphate and water funnel etc complete all as per electrical plate No 4 of SSR Part I complete all as spd and directed by Engr-in-Charge.

Material and labour for earthing in replacement of with galvanized mild steel earth plate electrode 60cm x 60cm x 6mm thick buried directly in ground (earth pit not less than 2.25 Mtr below ground level) with top edge of earth plate not less than 1.5 Mtrs below ground level connected to GI strip 32x6mm as earth lead by means of nuts, bolts, thimbles, chuck nuts, washers of GI or steel, including PCC (concrete chamber) shall be PCC 1:3:6 type C-1 using 20mm graded stone aggregate, with fair finish internal surface of concrete chamber shall be given 15mm thick plaster in CM 1:4, funnel with wire gauge mesh, 80 mm thick RCC pit cover 320 mm x 320 mm of RCC 1:2:4 type B-1 using 20 mm graded stone aggregate reinforced with XPM, JALLI and charcoal dust and common salt all as shown in electrical plate No 3 of MES SSR Part-I (2009) and specified including provision of GI strip protected by 40 mm dia medium grade pipe and watering pipe shall be 20mm bore medium grade, and including all excavation and earth work & connecting the earthing to an earthing test point complete all as specified & directed by Engr-in-Charge.

Material and labour for preparation of old painted surfaces of chain link/Barbed wire fencing/gate/angle iron/PCC post of sub station of size upto 50 Sqm (approx) (outer exposed surface) painting starts from above ground level including MS channel / angle iron and GI bracket/clamps with bolts, nuts and applying two coat of aluminium paint / snowcem including writing substation details with black colour of existing size letters all as specified and as directed.

Cutting existing road / foot path bituminous macadam and PCC on foot path for laying protection pipe for cable and making good the disturbed surfaces of road/ foot path to match with the existing surface all as required , specified , and directed at site by Enge-in-charge. Note: PCC will be measured and paid seperately

Dismantling posts or struts (wood steel or RCC) any section including taking out embeded portion of concrete and making good disturbed ground complete all as specified & directed by Engr-in-Charge.

Dismantling old chain link/barbed fencing of any size or mesh complete all as specified & directed by Engr-in-Charge.

Dismanlting wrought iron or mild steel work of any description not otherwise provided for complete all as specified & directed by Engr-in-Charge.

Material and labour for cement concrete 1:2:4 type B2 using 40mm graded stone agg as in foundation of posts and pillars complete all as specified & directed by Engr-in-Charge.

M&L for 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 (Brackets over 10 kg each to be measured under 'Structural Steel') complete all as specified & directed by Engr-in-Charge.

Material and labour for synthetic enamel paint over a coat of red oxide primer including preparation of new surfaces of steel and iron surfaces of any description over 10cm in width or grith not otherwise described complete all as specified & directed by Engr-in-Charge.

Supply and fixing 4mm dia galvanised steel wire 150x100mm mesh, made up into mattresses or cages, laped, wired and laid in position including closing after filling complete all as specified & directed by Engr-in-Charge.

Supply and fixing in replacement mild steel chequered/MS plates 5 mm thick or over in thickness in available sizes, Fe-410W (Gde-250) quality-A duly painted with two coat of black bituminous paint over one coat of red oxide primer and cut to shape for cable duct complete all as specified & directed by Engr-in-Charge.

Supply and fixing in replacement of 2.5 mm thick insulated synthetic mat conforming to IS 15652 : 2006 and meeting the requirements of IS : 5216 (Part 1.2 & 3), IS 8437, IFC-479 Pub-1, alongwith suitable adhesive/chemical bound, PU resin, waterproofing compound and sealing material as per in service recommendation of IS : 15652 Class-B suitable for working voltage up to 11 KV with trolley movement complete all as specified and as directed by Engineer-in-charge.

Supplying, installation, testing & commissioning of epoxy resin cast, 11 KV HT Current Transformer (CT) of ratio 100/50/5+5 of 15VA burden and Class-I accuracy for metering and 5P10 for protection in the existing HT Panel board i/e dismantling the old worn out HT Ct from the panel by disconnecting the bus bars and cable termination, reconnection i/e providing & fixing copper bus bar connection of suitable size and rating, HT insulators, HT taping, monoplast compound on bus bars and end termination etc. complete all as specified and directed by Engr-in-Charge.

Demolition of brickwork built in cement mortar, including all quoins, arches, pillars etc of any description including removing debrish from site complete all as specified.

Material and labour for brickwork with sub class `B' bricks, straight or curved on plan exc 6m mean radius built in cement mortar 1:6 complete all as specified.

Taking down cement plaster or cement lime plaster on brick or stone walls etc including raking out joints hacking for key scrubbing down with water etc complete all as specified and as directed.

Material and labour for 15 mm thick cement plaster on fair faces of brick work or concrete surfaces in cement mortar 1:4, to be finished even & smooth complete all as specified & directed by Engr-in-Charge.

Material and labour for preparation of surfaces plastered or unplastered new surfaces on walls including brooming down or steel wire brushing, scraping down and applying two coats of cement base paint of approved colour and shade complete all as specified and as directed.

BRIJ MOHAN LAL AND CO. (BID ID -3366275)

M/s Prakash Enterprises (BID ID -3365603)

Commercial Traders (BID ID -3366347)

Ruchi enterprises (BID ID -3366462)