CA NO CWE/PM/N-21/2020-21 REPAIR/MAINTENANCE OF DISTRIBUTION TRANSFORMER SERVO STABILIZERS, HT VCBs AND HT CABLE IN THE AREA OF AGE E/M I UNDER GE (AF) PALAM DELHI CANTT-10

Amount

Excavation in trenches not exc 1.50 M wide and not exc. 1.5 M deep and getting out in soft/loose soil 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 M away and depositing where directed at a level not exc 1.5 M above the starting point complete, all as specified and directed by Engineer-in-Charge.

M&L for sand cushioning to under ground 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 : Only 18 cm thick will be considered for payment purpose.

M&L 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.

Laying only but old 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 item No 1 here in before complete, all as specified and directed by Engineer-in-Charge.

Supply, laying testing and commissioning in replacement of trenches /passing through pipes/ on poles etc cable XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with stranded aluminium conductor, 11000 volts, grade of size of cable 300 sq mm 3 core suitable for earthed system including taking out unserviceable cable 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 BOQ.

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 .7.00 here-in-before but size 95 sqmm 3 core complete, all as specified and directed by Engineer-in-Charge.

M&L for defect rectification HT 11 KV 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 185 Sq mm 3 core. The fault locating equipments will be brought to site within an hours of instruction from Engineer-in-Charge. complete, all as specified and directed by Engineer-in-Charge.

Supply and jointing cold shrinkable straight through joint with jointing material suitable for HT 11KV XLPE cable of size 240 to 400 Sq mm 3 core complete, all as specified and directed by Engineer-in-Charge.

All as per item No 12.00 here in before but suitable for cable size 120 to 185 Sq mm complete, all as specified and directed by Engineer-in-Charge.

Supply and jointing cold shrinkable end termination outdoor joint with jointing material suitable for HT 11KV XLPE cable of size 120 to 185 Sq mm 3 core complete, all as specified and directed by Engineer-in-Charge.

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

All as per item No 15.00 here-in-before but for size 120 to 185 Sq mm complete, all as specified and directed by Engineer-in-Charge.

All as per item No 15.00 here-in-before but for size 50 to 95 Sq mm complete, all as specified and directed by Engineer-in-Charge.

Taking out trolley of vacuum circuit breaker 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 complete, all as specified and directed by Engineer-in-Charge. Note: (i) The various unserviceable items required to be replaced shall be paid seperately under Item Nos 18.01 to 18.08. (ii) Calibration of relays shall be paid seperately.

Supply only for replacement of fixed contact block complete suitable for 630/800 Amps, 11 KV HT VCBs complete, 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 complete, 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 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, CAT Part No 598/SP complete, all as specified and directed by Engineer-in-Charge. .

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

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

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

Supply only for replacement of HT 11 KV PT HRC Fuse complete, all as specified and directed by Engineer-in-Charge.

Callibration of microproccessor 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/ Khaber line for proper functioning complete, all as specified and directed by Engineer-in-Charge.

S&F in replacement of Vaccum interruptor type WL-33379 (4 inch dia) suitable for HT VCB 630/800 Amps complete, all as specified and directed by Engineer-in-Charge. CAT Part No 501/SP Make : Crompton Greaves/ Indoasian/ C&S

S&F in replacement of trip push button suitable for HT 11 KV OCB/VCB.complete, 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 directed by Engineer-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 and directed by Engineer-in-Charge.

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

S&F in replacement motor and gear assembly 110 volts AC/24V DC UMG-14 type CAT Part No 536/SP Make : CG complete, all as specified and directed by Engineer-in-Charge.

S&F in replacement of isolating contact assembly suitable for 630 Amps HT VCB CAT Part No 503/SP Make : CG or equivalent complete, all as specified and directed by Engineer-in-Charge.

S&F in replacment of Power pack with battery backup 110V AC/30V DC &nconnected to HT PT secondary circuit including testing for triping complete. Make: Areva/Electromotive/Power pack complete, all as specified and directed by Engineer-in-Charge.

Supply and installations as in replacement of voltage transformer (PT) 3 phase, 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.

S&F in replacement Digital protective 3 phase over current and earth fault relay for HT 11 KV VCB/OCB panel with high set and RS-485 MC61C complete with connection and testing on full load, complete, all as specified and directed by Engineer-in-Charge. Make AREVA/L&T/C&G.

S&F 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 OCB/VCB panel and connection and testing on full load, complete, all as specified and directed by Engineer-in-Charge. Make AREVA/L&T/C&G

S&F in replacement of Master trip relay suitable for working voltage 30 Volt DC and connecting the circuit with existing over current and earth fault relas complete, all as specified and directed by Engineer-in-Charge. Make:Areva/Alstom/crompton

S&F in replacement of volt meter 0-15 KV PT operated anlog type of size 150mmx150mm meter suitable to mount on existing HT panel complete, all as specified and directed by Engineer-in-Charge. Make: AE/ Adarsh/HPL

S&F in replacement of maintenance free fully charged Nickle cadmium battery 60 Ah, 12 volts complete, all as specified and directed by Engineer-in-Charge. Make:-EXIDE/AMCO/SU-KAM

Opening the front and rear cabinate of the RMU 3way/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 and placing the SF-6 VCB and isolating unit in its original position complete, all as specified and directed by Engineer-in-Charge. Note: (i) The various unsv items required to be replaced shall be paid seperately under item No. 35.01 to 35.09. (ii) Calibration of relays shall be paid seperately.

Supply only 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 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 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 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 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 onlyring 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 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 Trifurcation boot 11 KV capacity for cable termination joint of RMU incoming and outgoing terminals including taking out old defective trifurcation boot complete, all as specified and directed by Engineer-in-Charge.

Supply only 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 Engineer-in-Charge.

S&F in replacement of earth fault protection and indicator relay for Ring main unit including callibrating the relay with existing load and tripping timming complete complete, all as specified and directed by Engineer-in-Charge. Make :Crompton Model EMG-1 or equivalent.

Disconnecting HT/LT sides of defective transformer indoor/outdoor installed on 2/4 pole structure/PCC foundation of any 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 complete, all as specified and directed by Engineer-in-Charge. Note :- the following items will be measured and paid separately under relevant items of the Sch ‘A’ (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 /replacement of any spares required for making transformer serviceable.

M&L 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.

M&L 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.

M& L 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 complete, all as specified and directed by Engineer-in-Charge.

All as per item No. 41.00 here in before but the transformer of capacity 500 to 800 KVA complete, all as specified and directed by Engineer-in-Charge.

M &L 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 complete, all as specified and directed by Engineer-in-Charge.

All as per item No. 43.00 here in before but the transformer of capacity 500 to 800 KVA complete, all as specified and directed by Engineer-in-Charge.

Disconnecting HT/LT sides of defective transformer indoor/outdoor installed PCC foundation of any capacity up to 800KVA and then drainage of transformer oil. upto bushing Opening of top cover and find out leakage/sepage of transformer oil from body / fins carrying out required repairs such as replacement of top gasket, HT/LT bushing, bushing gaskets/tap changer and rifillig 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 Sch ‘A’

M&L 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 complete, all as specified and directed by Engineer-in-Charge.

All as per item No. 46.00 above but the transformer of capacity 500 to 800 KVA complete, all as specified and directed by Engineer-in-Charge.

Dehydration/filtration of transformer oil by means 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 re-installation of 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/replaced 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. & Cap of transformer complete all as specified and directed by engineer in charge suitable for transformers of capacity 100 to 400 KVA complete, all as specified and directed by Engineer-in-Charge.

All as per item No. 51.00 here in before but the transformer of capacity 500 to 800 KVA complete, all as specified and directed by Engineer-in-Charge.

M& L for replacement of worn out breather with silica gel all as per existing sample suitable for transformers of capacity 100 to 400 KVA. Make: Jaypuri Brother /Pactil complete, all as specified and directed by Engineer-in-Charge.

All as per item No. 53.00 here in before but the transformer of capacity 500 to 800 KVA complete, all as specified and directed by Engineer-in-Charge.

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

All as per item No. 55 here in before but the transformer of capacity 500 to 800 KVA complete, all as specified and directed by Engineer-in-Charge.

M& L 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 complete, all as specified and directed by Engineer-in-Charge.

Dismantling and opening of existing servo voltage stablizer 100 KVA to 250 KVA with disconnection of all incomming and outgoing connection with taking proper safety measure , drain out insulating oil if reqd and servicing of stabilizer inluding greasing of the machanical gear, servicing of motor with replacement of mechenical parts , replacement of all wiring and PCB circuits for maintaining input variation between 340 V to 460 V with output voltage stablized at 415 with accuracy +(-) 2.5% and speed of correction 8 V per Second replacing the digital voltmeter and Ammeter, auto adjustment setting complete, all as specified and directed by Engineer-in-Charge. Note:- The rate quoted against this item shall include:- (a) Testing and adjusting of springs, contacts, all control circuits . (b) The cost of any minor parts such as springs, nuts, bolts, terminal blocks etc which are not included in the Sch 'A' item No.58 above . (c) Any brazing and welding if need to the control system or the body

Supply only Micro processor based control card suitable for 150 to 180 KVA complete, all as specified and directed by Engineer-in-Charge. Make- Volina/AE/Vinitek.

Dimmer stat unit 200 Amps suitable for 180 KVA Servo stablizers existing make and model complete, all as specified and directed by Engineer-in-Charge. Make- Volina/AE/Vinitek.

Electronic circuit card (PCB)suitable for 180 KVA Servo stablizers complete, all as specified and directed by Engineer-in-Charge. Make- Volina/AE/Vinitek.

M & L for earthing complete with copper earth plate electric 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 3 of SSR Part I complete, all as specified and directed by Engineer-in-Charge. Note: 1. RCC pit cover shall be precast of RCC 1:2:4, type B-1 (20 mm graded stone aggregate) 80 mm thick reinforced XPM not less than 4 Kg/Sqm in lieu of Cl cover. 2. GI earth strip upto 7.5 m is deemed to be included in the quoted rate and beyond 7.5 m will be measured and paid separately under relevant items.

Commercial Traders

M/s Adhikari construction co.

Ridhi engineers and builders