SPECIAL REPAIR/ REPLACEMENT TO HT VACCUM CIRCUIT BREAKER AT MAIN RECEIVING STATION AND TEJAS ENCLAVE POWER HOUSE ALONGWITH CONNECTED ITEMS AT AFSSR GURGAON UNDER GE AF GURGAON

Amount

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. Location: - (a) T.O.P - (i) 9637VG, (ii) 9640 VG, (iii) 9638VG, (iv) 9639VG, (v) 295/3110/HV/03-04, (vi) 295/3109/HV/03-04, (vii) 53091VG, (viii) ITE/VCB/207 (b) Tejas :- (i) 53083VG, (ii) 53084 VG, (iii) 53090 VG

(a) Dismantling the HT CB 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 for the followings :- (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 HTCB, checking the operations of the closing/tripping trough 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/warn 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. (ii) Note:- Spare parts will be measured and paid seprately.

Supply of the following material for VCBs :-

(i) Power Pack 24 Volt 7 Ah with suitable backup

(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) MCB SP 6 Amps 230 Volts

(xxvi) Epoxy body 11KV 630A

(xxvii) Auxialary contact Male&Female

Supply and filling SF6 gas in existing RMU of 630 Amps including all charges all as specified and directed.

Supply and laying 2.5mm thick synthetic rubber mat Confirming to IS:15652 2006 and relavant ISs along with suitable adhesive/chemibound, PU Resin, water proofing compound and sealing material suitable for working Voltage up to 11KV with trolley movement complete all as specified and as directed.

Taking down unserviceble CDG 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 model MC 61A as per site requirement complete all as specified and directed.

M & L for Earthing in repair complete with galvanised steel earth plate electrode 60cmx60cmx6.0mm 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 and directed.

Supply and fix GI strip as repair in trenches or wall 32 x 6 mm galvanised iron strip 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.

(a) Upto 250 KVA (i. A-21169, ii. A-21168, iii. ECE582521, iv. 3417, v. 1641, vi. 21166)

(b) 315 KVA (i. ITE/G/4656, ii. A-20691)

(c )400 KVA to 500 KVA (i. ITE/G/2827, ii. ITE/G/2823, iii. ITE/G/2826)

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.

M&L for Dehydration including filteration and cleaning of transformer oil at site by centrifugal dehydrating machine till to achieve Di-electric strength 40 KV at 2.5m gap 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.

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.

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.

Supply and jointing cold shrinkable end termination indoor joint suitable for HT 11 KV XLPE cable of size 120 -185 sqmm, 3 core complete all as specified and directed.

Supply and jointing heat shrinkable straight through joint suitable for HT 11KV (earthed) XLPE armoured aluminium cable of size 50 to 95 Sq mm 3 core complete all as specified and directed.

Supply and jointing heat shrinkable straight through joint suitable for HT 11KV (earthed) XLPE armoured aluminium cable of size 120 to 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 (earthed) XLPE armoured aluminium 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 (earthed) XLPE armoured aluminium cable of size 50 -95 sqmm, 3 core complete all as specified and directed.

Supply and jointing heat shrinkable end termination outdoor joint suitable for HT 11KV (earthed) XLPE armoured aluminium 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. (T.O.P - i. 040216000846, ii. 040216000848, Tejas - i. IVYNO40212000316, ii. IVYNO40212000318)

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. (T.O.P - i. 040216000846, ii. 040216000848, Tejas - i. IVYNO40212000316, ii. IVYNO40212000318)

Supply & fix in replacement of RMU 630 Amps one incoming two out going cable termination chamber 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. (T.O.P - i. 040216000846, ii. 040216000848, Tejas - i. IVYNO40212000317)

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, 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.

S&F in renewal silica Jel breather assy with vent pipe for indoor/outdoor transformer of the follolwing capacity :-

up to 315 KVA

315 KVA to 1000 KVA

Supply & Filling /pouring of transformer oil of low viscosity having dielectric strength not less than 60 KV after draining out old transformer oil complete all as specified and as 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.

M&L for painting of transformer with existing colour, by using spraying machine upto 500 KVA before cleaning/preparation of outer surface of transformer including writing of SM No, MES No. and capacity of transformer in red colour complete all as specified and directed.

Net Contract Sum will be after deducting Sch of Credit of Rs 98,876.00

D P ENTERPRISES