REPAIR MAINT OF TRANSFORMER HT EXTERNAL ELECTRIFICATION AND ALLIED WORKS AT AF STN GURGAON UNDER GE AF GURGAON

Amount

M&L for disconnecting electric outdoor/indoor transformer of capacity upto 500 KVA from HT/LT terminals and lowering down/getting out from 2/4 pole structure/plinth sub station for major repair/minor repairs complete all as specified and directed.

M&L for draining out complete transformer oil upto 500 KVA at site which found major repair and storing the same in suitable container (container to be provided by the contractor to keep aside for re-use (after repair) and lifting of core assembly by opening of top cover and other items for inspection/examination and lowering/fixing of core assembly in its original position after inspection to make it ready for transportation to carry out servicing/repair work in workshop complete all as specified and directed. Note :- Transportation charges and container for keeping transformer oil,hydra machine for lowering or lifting is included in the quoted rate by contractor.complete all as specified and directed.

M&L for opening of top cover by unscrewing nut, bolts & washers etc and taking out core assy from tank by disconnecting from tap changer HT & LT side bushing studs to outside by dismantling the channel and disconnecting star delta connection complete all as specified and directed.

M&L for removing the lamination in proper manner carefully for taking out serviceable/unserviceable HT/LT coils from the limbs complete all as specified and as directed.

M&L for rewinding of HT coils with copper wire DPC/super enameled high quality matching with existing gauge and impedance including all type of insulating material (Paper/Cloth) in each layer or winding complete all as spcified and directed. Note :- The rate quoted against the item is inclusive of cost of all types of insulating materials and heating/varnishing etc.

All as Srl item No. 5.00 above but LT coils with copper strips complete all as specified and directed. Note :- The rate quoted against the item is inclusive of cost of all types of insulating materials and heating/varnishing etc.

M&L for re-arranging the top lamination over coils in proper manner including fixing of top channel soldering in between coils as necessary and brazing of star delta connection with tap changer complete all as specified and directed.

S&F in renewal of transformer bushing LT side including brass set stems conical bush/ gasket for indoor/outdoor transformer for the following capacity complete all as specified and directed. Note : The rates quoted is deemed to be included the cost of necessary labour charges for draining out transforer oil, opening of top cover by unscrewing nut, bolts washers and and suitable size nut and washers etc.

Upto 250 KVA

400 KVA to 500 KVA

S&F in replacement porcelain transformer bushing HT 11 KV including brass set stems conical bush/ gasket for indoor/outdoor transformer upto 500 KVA complete all as specified and directed.

S&F in renewal silica Jel breather assy with vent pipe for indoor/outdoor transformer of the follolwing capacity complete all as specified and directed. :-

up to 315 KVA

315 KVA to 500 KVA

M&L for Dehydration including filteration and cleaning of transformer oil by dehydrating machine incl testing of sample before and after dehydration and filteration complete all as specified and directed. Note:- Contractor has to arrange the dehydration machine and testing kit without any extra cost to the deptt. Test report to be submitted after completion of job.

Supply & Filling /pouring of transformer oil of low viscosity having dielectric strength not less than 60 KV complete all as specified and directed. Note:- Dielectric strength test shall be carried out at site before poring/filling in transformers in the presence of Engr-in-Charge on the site.

S&F in repairs switch air break, gang operated HT 11 KV triple pole, mechanically operated, mounted on 12 insulators and steel frame with drop out fuse assembly (having 06 post nsulators including HT barrel fuse of suitable capacity as required at site), vertically or horizontally with operating mechanism worked from ground level, for current rating up to 200 amps complete including taking down existing unserviceable switch complete all as specified and directed. Note:- All fixing material included in the quoted rate.

M&L Restringing only ACSR conductor of any type/ size on existing LT/ HT poles, etc including binding on to insulators with and including aluminium wire complete all as specified and directed.

M&L for jumper connection between GOD and drop out fuses and transformers with ACSR conductor of size 6/1 x 2.59 mm n.exc. 2m long including aluminium socket clamped both ends and PVC sleeves including taking down old u/s existing jumper of any size or type complete all as specified and directed.

S&F in replacement lightning arrester expulsion type complete with all fittings, transmission class, discharge capacity 65 KA metal oxide type suitable for earthed system 11 KV complete all as specified including dismantling existing arrester complete all as specified and directed.

S & F shackle type porcelain,vitreous, white brown insulator including galvanised mild steel straps, washers, insulation bolts,washers and nuts for1100 volt and size of 75 x 90 mm including taking down old u/s existing insulator of any size or type complete all as specified and directed.

Supply and fix pin type porcelain, vitreous white , brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 150 mm height , 150 mm dia for 11000 volts grade complete including taking down old U/s existing insulator of any size or type complete all as specified and directed.

Decarbonsing/ cleaning complete HT VCB/RMU, 11 KV cubicle type, consists of bus bar chamber, circuit chamber and metering chambers, by opening the spout/bus covers inspecting the bus bar joints, cleaning of bus bars, checking the bus bar spouts and circuit spouts for any flash overs/tracks, applying Becktol red solution to the bus bars and spouts having moderate tracking, replacement of bus bar/circuit spouts in case of spouts subjects to heave tracking, applying HT insulated red compounds at the bus bard joints after tightening of joints, cleaning of bus bar insulators and bus bars with CTC and ensure proper decarbonisation and re-assembling complete all as specified and directed. Note : Servicing of VCB's/RMU will be carried out by the authorized manufacturer/OEM.

Taking down unserviceble CDG 61/31 relay and Supply, install, testing and commissioning of self powered microprocessor based numerical 3 Phase over current and earth fault relay with high set for both O/C and E/F, fault records and suitable for panel mounting with auxialiary supply voltage range 24 V to 110 V as per site requirement complete all as specified and directed. Make: CG/Areva/Micom/ABB Note:- (i) Replacement of existing relay and refixing of new relays and necessary control wiring , testing, calibration, setting to load requirements etc., are deemed to be included in the rates quoted. (ii) Any modification/sheet metal work for relay fixing is deemed to be included in the rates quoted.

Taking down the HT vacuum circuit breaker/Oil Circuit breaker of any capacity 11 KV,for servicing, repairs, replacement of defective/worn out components and re-assembling complete comprising of the following including testing and commissioning to the entire satisfaction of Engineer-in-Charge complete all as specified and directed.

(a) Dismantling the HT VCB from the enclosure consisting of interuper assembly, socket contacts, checking the serviceability of the following parts carefully including cleaning, adjustments, replacement of defective/worn out parts and re-assembling the unit complete. (i) Cleaning the external surface of bushings with CTC or Liquid ammonia to remove the accumulation of dirt or any other deposits. Inspection of bushings and make sure that vibration due to breaker operation have not caused the bushings to move resulting misallignment of contacts. (ii) Checking the interrupter assembly and contacts. Checking the allignment of contacts and setting the contact surfaces to bare firm and uniform pressure and adjust the gap as per manufacterurs tolerance. Badly potted contacts needs to be replaced. Note: Contacts shall be ordered separately. (iii) Checking the breaker bushing of bus bar and circuit side inspecting the interval surface carefully for any charging/trackings,replacement of bushings.

(b) Dismantling the spring charging mechanism of the HT VCB, checking the operations of the closing/tripping through closing/tripping coils electrically as well as manual charging including cleaning adjustments and replacement of defective /worn out parts re-assembly complete for the following. (i) Checking the condition of the spring charging motor along with gear box including servicing to the motor bushes, lubrication of bearing surfaces etc. (ii) Checking the ratchet wheel assembly, driving and charging parts including replacement of defective ratchet wheel and parts. (iii) Checking the type and release prop and dash pot assembly making necessary adjustment including replacement of defective/worn out components. (iv) Checking the operating mechanism of the breaker and ensure its operation freely through entire stroke. Parts which shows excessive wear and tear to be replaced or adjusted as per manufacterurs tolerance. (v) Checking of operating voltage at mechanism terminals and tripping arrangement for positive tripping. Contacts to be examined for their condition and operation. Dress the pitted contactcts and replace if necessary. (vi) Review the adjustment of all pressure switches and lockout devices. (vii) Inspecting all bolts, nuts, pins and coller pins are in place and they are tight and opened properly. (viii) Inspetion, cleaning and relubrication of circuit earthing truck with Aseol Molite or Moliday 47. Note:- (I) Cost of additional hardware like, bolts, nuts , washers and spring washers, petroliumjelly CTC, to put the breaker in serviceable condition is deemed to be included in the rates quoted.

Supply of the following material for VCBs complete all as specified and directed :-

(i) Power Pack with 12 V

(ii) Isolating Contact 2 Pair Finger Type

(iii) Isolating Contact 2 Pair Flat Type

(iv) Vaccum Interrupter

(v) Flexible connection

(vi) Shutter for racking Shaft

(vii) Closing Coil 110V AC/DC

(viii) Shunt Trip Coil 24V DC/110V DC

(ix) Ratchet Wheel

(x) Motor cut off switch

(xi) Bus bar Spout 800A

(xii) Circuit Spout 800A

(xiii) Shutter for bus bar spout

(xiv) Shutter operating Link

(xv) Draw out type 3 Phase PT 11KV/110V 200 VA class 1.0 cast resin wound type, 3Core with enclosure, wheels, HT bushings and HT fuses mounted on with drawable truck.

(xvi) HT Epoxy CT 200-100/5-5A with 15 VA class 1.0 for metering and 5 P 10 for protection.

(xvii) HT Epoxy CT 100-50/5-5A with 15 VA class 1.0 for metering and 5 P 10 for protection.

(xviii) LED indication Lamp

(xix) Service/Test position Limit Switch

(xx) Space heater

(xxi) Thermostat for Space heater

(xxii) HT Tape roll 16.6 M

(xxiii) Spring Motor with gear box

(xxiv) Bus bar supporting insulator

(xxv) HRC Fuse suitable for HT CBs 2A to 16A

(xxvi) Auxialary contact Male&Female

M&L for defect rectification HT/LTcable 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 any size. The fault locating equipments will be brought to site within the hours of instruction from Engr-in-Charge complete all as specified and directed.

Supply and jointing heat shrinkable straight through joint suitable for HT 11KV XLPE cable of size 95 Sq mm 3 core complete all as specified and directed.

Supply and jointing heat shrinkable straight through joint suitable for HT 11KV XLPE cable of size 185 Sq mm 3 core complete all as specified and directed.

Supply and jointing heat shrinkable end termination indoor joint suitable for HT 11 KV XLPE cable of size 50 -95 sqmm, 3 core complete all as specified and directed.

Supply and jointing cold shrinkable end termination indoor joint suitable for HT 11 KV XLPE cable of size 95 -120 sqmm, 3 core complete all as specified and directed.

Supply and jointing heat shrinkable end termination outdoor joint suitable for HT 11KV XLPE cable of size 120 to 185 Sq mm, 3 core complete all as specified and directed.

Supply & fix in replacement of RMU 630 Amps gas chamber/bottle after disconnection the all electrical connections and re connections after replacing the gas chamber/bottle and testing complete all as specified and directed.

Supply & fix in replacement of RMU 630 Amps one incoming two out going circuit switch assembly comlete after disconnection the all electrical connections and re connections after replacing the circuit switch and testing complete all as specified and directed.

Supply & fix in replacement of RMU 630 Amps one incoming two out going cable termination chember locking arrangements assembly comlete after disconnection the all electrical connections and re connections after replacing the locking assembly and testing complete all as specified and directed.

Supply & fix in replacement of seal for RMU 630 Amps gas chamber/bottle after disconnection the all electrical connections and re connections after replacing the gas chamber/bottle and testing complete all as specified and directed.

Supply and filling SF6 gas(Apprx 1.2 Kg) in existing RMU of 630 Amps including all charges complete all as specified and directed. Note : Item Srl No. 29.00 to 32.00 repair work will be carried out by the authorized manufacturer/OEM.

Supply, laying & testing cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty)with stranded aluminium conductor, 11000 volts grade, of size 3 core 185 sqmm complete all as specified and directed.

Supply, laying & testing cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty)with stranded aluminium conductor, 11000 volts grade, of size 3 core 95 sq mm complete all as specified and directed.

Excavation in trenches n exc 1.5 wide and n exc 1.5 m in depth for foundation etc or for laying cable etc n exc 10 Sqm on plan and n exc 1.5 m in depth and getting out in soft/loose soil complete all as specified and directed.

Returning filling in including spreading, leveling, watering and well ramming in layers n exc 25 cm complete all as specified and directed.

Removal of excavated material/surplus soil to a distance n exc 50m and depositing where directed at a level n exc 50m above the starting point complete all as specified and directed.

Supply and filling river sand in trenches including spreading for cushioning of LT UG cable complete all as specified and dirceted. Note : Punned down thickness shall be measured and paid .

Supply and laying of PCC cable cover class HV type 1, with flat of size 300mmx180mmx40mm complete all as specified and directed.

M & L for Earthing complete with galvanised steel earth plate electrode 60cmx60cmx6mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below normal ground level) with top edge of the plate not less than 1.5 metre below normal ground level, connected to and including using galvanised iron strip 32×6mm as earthing lead by means of bolts, nuts, check nuts and washers of galvanized iron or steel, earth plate surrounded by packed layer of char coal dust and common salt, 15cm thick all around bottom and top and watering pipe 20mm bore of GI light grade with funnel, wire mesh and 40 mm dia GI protection pipe medium grade all as shown in electrical plate No 3 of SSR Part-I and connected to earthing test point, main switch board and testing on completion including excavation, earth work concrete pit with 80mm thick RCC cover in RCC 1:2:4 type B-1 duly reinforced with MS bars 8mm dia @ 150C/C both ways and pit chamber in PCC 1:2:4 type B-1 with 2 Nos suitable lifting handles of 12mm MS bar complete all as specified.

Supply and fix GI strip in trenches or wall 32 x 6 mm galvanised iron strip complete all as specified and directed.

Draining of transformer capacity 315KVA to 400 KVA Complete oil in Barrel before Draining the oil,the oil in the Transformer Tank should be heated by filter machine at around 70’0c .when the oil is totally drained out the core-coil Assembly higher the ambient complete all as specified and directed.

Dismantling & Refiting of all the Fittings of the transformer capacity 315KVA to 400 KVA Such as HT & LT Bushing, Conservator,Explosion vent,Top cover,radiators Bucchholz Relay,Inspection Cover,OTI,WTI,HT,LT Cable Boxes. Including Hiring of Crane complete all as specified and directed.

Washing of core coil Assembly of transformer capacity 315KVA to 400 KVA by Hot oil to Remove the Sludge,carbon depositionand any other Foreign Particles Deposited over it. (A) Tightening of core studs & checking IR complete all as specified and directed. (B) Checking Tightnes of Coil. (C) Paper covering to main leads wherever required. (D) Flushing the Radiators. (E) Cleaning the Tank inside by Hot oil .

Supply/Prepration & Replacement of oil sealing Gasket made from rubberized cork sheetconfirming to grade RC 80c of IS 4523 PART (II) for transformer capacity 315KVA to 400 KVA all the for whole Transformer complete all as specified and directed.

After cleaning of transformer capacity 315KVA to 400 KVA the assembly,and Tank ,topup the new oil in the Transformer after filtration with filter machine.after filtration the oil will be tested for BDV in the presence of MES Engineer at site.The BDV Value should meet grater then 60 KV used in complete all as specified and directed. Note:- New transformer oil will be measured under item srl no.12.

Degreasing & Derusting of transformer capacity 315KVA to 400 KVA all the external surface of tank and fitting.applying one coat of metal primer at the rusted spot.Applying two coat of synthetic enamel paint having used complete all as specified and directed.

Supply Complete set transformer capacity 315KVA to 400 KVA in replacement of HT,LT Brass metal parts,with porcelain insulator,arcing Horn,ring,250 gm Silica Gel Breather,Dial type OTI Stamp Size,Extra Neutral Bushing complete all as specified and directed.

Draining of transformer capacity 200KVA to 250 KVA Complete oil in Barrel before Draining the oil,the oil in the Transformer Tank should be heated by filter machine at around 70’0c .when the oil is totally drained out the core-coil Assembly higher the ambient complete all as specified and directed.

Dismantling & Refiting of all the Fittings of the transformer capacity 200 KVA to 250 KVA Such as HT & LT Bushing, Conservator,Explosion vent,Top cover,radiators Bucchholz Relay,Inspection Cover,OTI,WTI,HT,LT Cable Boxes. Including Hiring of Crane complete all as specified and directed.

Washing of core coil Assembly of transformer capacity 200 KVA to 250 KVA by Hot oil to Remove the Sludge,carbon depositionand any other Foreign Particles Deposited over it. (A) Tightening of core studs & checking IR complete all as specified and directed. (B) Checking Tightnes of Coil. (C) Paper covering to main leads wherever required. (D) Flushing the Radiators. (E) Cleaning the Tank inside by Hot oil .

Supply/Prepration & Replacement of oil sealing Gasket made from rubberized cork sheetconfirming to grade RC 80c of IS 4523 PART (II) for transformer capacity 200 KVA to 250 KVA all the for whole Transformer complete all as specified and directed.

After cleaning of transformer capacity 200 KVA to 250 KVA the assembly,and Tank,topup the new oil in the Transformer after filtration with filter machine.after filtration the oil will be tested for BDV in the presence of MES Engineer at site.The BDV Value should meet grater then 60 KV used in complete all as specified and directed.

Degreasing & Derusting of transformer capacity 200 KVA to 250 KVA all the external surface of tank ank fitting.applying one coat of metal primer at the rusted spot.Applying two coat of synthetic enamel paint having used complete all as specified and directed.

Supply Complete set transformer capacity 200 KVA to 250 KVA in replacement of HT,LT Brass metal parts,with porcelain insulator,arcing Horn,ring,250 gm Silica Gel Breather,Dial type OTI Stamp Size,Extra Neutral Bushing complete all as specified and directed.

Net Contract Sum will be after deducting Sch of Credit of Rs 1,67,503.50

Shiv Enterprises

Ridhi engineers and builders

shiv shanker enterprises

Parveen Builders

BLUE HILL ELECTRICAL AND ELECTRONICS