CA NO CWEAFJ-31/2025-26 REPAIR AND MAINTENANCE OF 66 KV SWITCH YARD AND CONNECTED ITEMS AT AIR FORCE STATION PATHANKOT UNDER GE (AF) PATHANKOT

Amount

Testing, recording and servicing of following mentioned equipments installed at 66 KV sub station including switchyaed equipments for their smooth functuining (for six Monthly Basis) (i)POWER TRANSFORMER (a) Oil level/ leakage/silica gel/Earthing (b)Testing controls such as Buchholz relay, Prv Trip, OSR Trip, Oil Temp- alarm/ Trip, winching Temp- alarm/ Trip, MOG alarm and their indication (c) Measurement of insulation distance values and polarization index including HT cables in the ckt. (d)IR Values of HT Cable (ii) SF-6 CIRCUIT BREAKER (a) Measurement of IR Values, contact resistance (b) Testing of Trip / close & closing / opening timing. (c) Checking of low gas alarm / lock out circuit, gass pressure. (d) Checking of operation of breakerfrom Local/ remote and also tripping of Breaker through protection relay.

(iii)CT and PT (a) Measurement of IR Values, tightning ofcontact (b) Checking of Oil leakage. (iv) ISOLATOR (a) Checking operation and positionof contacts, inter Locks and manual operation. (v)LIGHTNING ARRESTER (a) Measurement if IR Values, Leakage current/ earthing, Jumper check and counter meter readings. (vi)VCB 11 KV (a) Measurement if IR values of Breaker % Bus Bar in all ckts. (b)Contact resistance and bring timing test. (c) Operation of breaker through relay and master relay (d) Inspection of cable connection and tightness. Relay Testing-(a) Testing for conditioning of relay and their actual testing for pickup and operation timing. Setting of relays with set parameters as actual tripping relays. (b)Testing of all auxiliary relays for their functioning in the desired manner.

(c) Checking of metering system and all indication circuits (d) Checking of capacitor banks 66 KV C & R PANELS (a) Checking of healthiness of DC/AC circuit and their failure alarms. (b) testing. Setting of relays viz. REF, Differential relays, Overcurrent and Earth fault relays and their coordination. ( c) Checking of Trip ckt supervision relay , alarm and Facia annunciators. (d) Checking of metering system and all indication circuits. DC BATTERY AND CHARGER (a) Checking condition of battery, DC voltage per cell and charging current/ float/ Trickle.

Supply and top up/ refilling of Transformer oil conforming to IS 335 1993 latest amendments for replacing oil in the transformer with breaking capacity not less than 45 kv complete all as specified and directed.

Painting of old painted surface of Transformer 66/11KV by scrubbing out old paint and painting with two coats of spray paint and one coat heat resistant metallic smoke grey paint complate including writing MES No. on Transformer body with black paint for 6.3/8MVA complete all as specified and directed.

Replacement of Silica gel in existing breather assembly complete all as specified and directed.

Cleaning of Sub Station and switchyard area by removing grass, weeds and any other vegetation including excavation inside it for protection forf growing of grass/ weeds for area measuring 1800 Sqm area. (Monthly cleaning of the sub stn and yard will be carried out) complete all as specified and directed.

Pea gravels 20 to 40mm graded hand picked ( any thickness) in sub station all as per latest engineering practice and directed by Engr-in-Charge.

Repair to existing MS Flat strip of any size as laid in groung of fixed in any position in the switchyard by taking our for rerouting or welding all as required at site and directed by Engr-in-charge.

Supply and fixing end jointing kit for 11 KV grade cable for out door termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Al conductor cable of size 120 to 185 sqmm including taking down old, etc, complete all as specified and directed. NOTE:- Item rate quoted including required T&P/Refixing & Refilling in the panel/pole.

Supply and fix end jointing kit for 11 KV grade cable for in door termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Al conductor cable of size 120 to 185 sq mm including taking down old, etc, complete all as specified and directed. NOTE:- Item rate quoted including required T&P/Refixing & Refilling in the panel/pole.

Supply laying and testing cable XLPE insulated screended PVC bedded , galvanised steel strip armoured, electric power cables (heavy cable ) with stranded aluminium conductor , 11000 Volts grade of size 3 core 120 Sqmm including taking down old unserviceable complete all as specified and directed.

Supply laying and testing cable XLPE insulated screended PVC bedded , galvanised steel strip armoured, electric power cables (heavy cable ) with stranded aluminium conductor , 1100 Volts grade of size 3.5 core 95 Sqmm including taking down old unserviceable complete all as specified and directed.

Dehydration including filteration and cleaning of transformer oil at different locations by stream line method dehydration plant including testing of samples before and after dehydration and filteration . Dielectric strength should not be less than 45 KV at 2.5 mm gap after dehydartion all as directied. Note :- (i) Test result before and after filteration to be recorded as per the sample provided by Engr-in-charge. (ii) The rate quoted is deemed to be inclusive of making necessary connection and the connection to filteration plant from transformers and switchgear oil duly removing the inlet and outlet connections. (iii) For topping up transformer oil will be measured and paid separately under relevant item of schedule.

Supply & fixing MCCB 3 pole 415 volts with rupturing cap 25 KA 160 Amps ICS 100 %ICU thermal magnetic release including taking down old unserviceable complete all as specified and directed.

Re-stretching of aluminium conductor any size and length complete including removing kinks and providing new binding wire /Jumper/ clamps where required all as specfied and directed by Engineer-in-charge.

M&L Earthing complete as per electrical plate No 5 of MES SSR Part I with galvanised steel plate earth electrode 60 cm x 60 cm x 6.0mm, burried directly vertically in ground in a pit of depth not less than 2.5 metres below ground level with the top edge of earth plate at a depth not less than 1.8m below normal ground level connected to and including galvanised iron 25 x 4 mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel. Earthing wire protected by galvanised iron or steel pipe 40 mm bore medium grade and connected to continuous earth wire on pole/ test point. Watering pipe shall be 20 mm bore GI medium grade. The earthing shall be inclusive of excavation and earth work in any type of soil,charcoal, salt,funnel , PCC pit and RCC cover complete all as specified & directed.

M&L Earthing complete as per electrical plate No 5 of MES SSR Part I with galvanised steel plate earth electrode 60 cm x 60 cm x 6.0 mm, burried directly vertically in ground in a pit of depth not less than 2.5 metres below ground level with the top edge of earth plate at a depth not less than 1.5 m below normal ground level connected to and including galvanised iron or steel earth strip 32 x 6 mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel. Earthing strip protected by galvanised iron or steel pipe 50 mm bore medium grade and connected to continuous earth wire on pole/ test point. Watering pipe shall be 20mm bore GI medium grade. The earthing shall be inclusive of excavation and earth work in any type of soil, charcoal, salt, funnel , PCC pit and RCC cover complete all as specified & directed.

M&L for earthing complete with using galvanized mild steel earth plate (electrode) 600 mm x 600 mm x 3.15 mm thick buried directly in ground, earth pit not less than 2.25 mtr deep below ground level with top edge of the earth plate not less than 1.50 m below ground level and earth plate surrounded with adequate quantity of charcoal dust mixed with salt to be packed thickness of 15 cm all round the plate using 20x3 mm copper strip as earth lead moulded and riveted duly welded at joints to earth plate at one end and connected to main equipment at switch/control board at another end, copper lead duly protected in and including 40 mm dia GI ‘medium grade’ pipe from upper end of earth plate upto equipment with & including 20 mm dia bore GI pipe ‘medium grade’ as water pipe from earth chamber to upper edge of the earth plate, GI funnel with wire mesh fixed on water pipe and provision of PCC 1:2:4 type B1(using 20 mm graded stone agg) as in pits chamber and RCC pit cover 50 mm thick of precast RCC 1:2:4 type B-1 (using 20 mm graded stone aggregate) as per electrical plate No.3 of SSR Part-II 2010 testing on completion all as specified and directed. Note: (i) If the desired earth resistance is not found within limit shall be redone by contractor at no extra cost. (ii) Cost of copper strip 20 x 3mm and 40mm dia pipe medium grade upto 7.5 mtr shall be included in the rate quoted for this item

Dismantling the existing earth strip & relaying of G.I. earth strip 32x6mm and fixing properly with clamps nut bolts complete all as specified and directed.

M&L in replacement of earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or burried in ground or drawn in conduit/ pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 25mm x3mm aluminium strip , complete all as specified and directed.

Supply and fixing 70 Watts street light LED fitting, new generation energy saving, environmental friendly long life, versatile pressure die cast aluminium, IP66 with 10KV surge protection road way,luminaire with high power LED as light source with warranty option of 5 years and suitable driversetc connecting with 4.0 sqmm multi strandard aluminium conductor PVC insulated twin core weather proof cable from fitting to junction box and fixing to pole with and including bracket made out of GI pipe of 40mm dia light grade not less than 1.2 mtr long bent to shape, fixed to pole in any position with flat iron clamps of size 50x6 mm, complete all as specified and directed.

Supply and fixing Copper strip 20 x 3 mm with saddles and fixing screws etc. for roof conductors and down conductors above ground including taking down old unserviceable complete all as specified and directed.

Supply and fixing Test point terminal block made out of gun metal or phosphourus bronze size 75x75x25mm drilled and screwed including 3 Nos 8mm long hex. head screw including taking down old unserviceable complete all as specified and directed.

Supply, erecting and fixing steel tubular swaged poles type 410 SP-55, 11 meter long, complete with cast iron base plate, final taper plug, bolts, nuts and screws as specified including painting with two coats of aluminium paint over one coat of red oxide primer and 06 Nos bands/ straps with white and red post office box colour (30 cm wide each) synthetic enamel paint at a distance 30 cm from plinth block and numbering of poles with black synthetic enamel paint in 2.5 cm height including black bitumineous paint two coats on steel surface embedded in concrete foundation including taking down old unserviceable complete all as specified and directed. (Excavation and earth work, pcc foundation concrete shall be measured and paid separately)

Supply and fixing HT 11 KV, out door type gang operated air-break switch suitable for horizontal or vertical mounting fixed type complete with 9 insulators of rating upto 400 Amps including taking down old unserviceable complete all as specified and directed.

Supply and fixing lightning arrestor expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp including taking down old unserviceable complete all as specified and directed.

S&F 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 including taking down old unserviceable all as specified and directed.

M&L 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 including taking down old unserviceable complete all as specified and directed by Engr-in-Charge.

M&L for PCC 1:3:6 type C2 using 20mm graded crushed stone aggregate as mass concrete for foundation complete all as specified and directed by Engineer-in-charge.

M&L for PCC 1:4:8 type D2 using 40mm graded crushed stone aggregate as mass concrete for foundation complete all as specified and directed by Engineer-in-charge.

Excavation in trenches in any type of soil not exceeding 1.5 metre deep and not exceeding 1.5mtr width and getting out soil including forming bottom surface to required slope/gradient for laying cables/pipes etc. All as specified and directed by Engineer-in-charge.

Returning, filling in including spreading, leveling, watering and well ramming in layers of 25 cm thick after the cables etc. are laid, jointed and tested complete all as specified and directed by Engineer-in-Charge.

Removal of surplus excavated spoil not exceeding 50 Mtr distance and depositing where directed by Engineer-in-Charge at a level not exceeding 1.5 m above the starting point complete all as specified.

Supply and laying un-reinforced pre cast concrete cable cover conforming to IS:5820 with minimum average breaking load capacity 300 kgs for unreinforced covers, class HV Type 1, flat, size 300mm x 180mm x 40mm complete all as specified and directed by Engineer-in-Charge.

Supply and laying un-reinforced pre cast concrete cable cover conforming to IS:5820 with minimum average breaking load capacity 200 kgs for unreinforced covers , class LV Type 1, flat, size 250mm x 150mm x 40mm complete all as specified and directed by Engineer-in-Charge.

Sand cushioning to underground cables providing a layer of 8cm thick before laying the cable and 15cm thick after laying,stretching and testing the cable complete all as specified.

Painting outer boundary channel / XPM fencing with smoke grey by scrapping old paint from the surface , cleaning it with primer complete all as specified and directed by Engineer-in-Charge.

Replacement of battery 2 V 180 AH complete all as specified and directed by Engineer-in-Charge..

Dismantaling of old unservicable card,relays, contactor and MCCB depositing back to MES store yard and replacement with new featured PHASE LINE TO LINE and LINE TO NEUTRAL Integrated micro chio programable output Flux regulation card designed for high speed synchronous motor connected with RC network for servo stabilizer for load not less than 400 KVA and also not exceeding more than 300 KVA Capacity built with auto load detector for three phase built with integrated operational difference voltage amplifier LT operated for over voltage sensor circuit up to 300 volts & lower voltage sensor circuit starting from 120 volts with 01 volt sensitivity relay set unit consisting of Vaccume impregnated step down transformer standing primary voltage up to 500 volts with 1100 volts insulation & standing 1100 volts for 03sec Secondary with potential voltage 20 volts going to electromagnetic relay units and next to Micro switches unit of existing Motor for sharp regulation at 233Volts ( +/- ) 1% (Adj.) also featuring RC Filters arrangement for provision to rotate clockwise / Anti clock wise with current consumption less than 01 amps with timer restriction not to be activated more then 05 sec in one operation i.e. .

433KV regulated including following features solid state electronic sensor design for exsisting 3 phase servo stabiliser Output impedance shall be 3.0 to 5.0 percent, The programmer shall be manufactured such that it will maintain electrical properties, even under severe overload, under/over voltage and under/over frequency conditions. Input correction range shall be -30% to +20% of nominal input voltage. The system design shall be capable of operating at an input frequency range of -15% to +10% of nominal, without clearing protective devices or causing component failure within the protection . Upon turn on or restart, the output of the exsisting Servo shall not exceed the specified output regulation limits. if the input voltage or frequency exceeds programmable minimum or maximum set points for a programmable time period (factory set for 10 seconds), the micro processor card shall electronically shut off command to new the installed MCCB as per load in Amps with minimum 25 KA rupturing capacity with new shunt tripp coil as per site requirement with on delay not to exceed 2 sec . When electrical parameters are back within acceptable limits for a programmable time period (factory set for 60 seconds), the MCCB shall manualy restart to provide conditioned power to the load.

If the input parameters are within acceptable limits, but the output voltage is outside of acceptable programmed limits, the output sensor card of any phase out of three phase shall electronically shut off and require a manual restart. The Micro Card shall be capable of operating at 100% rated load capacity continuously, 200% rated load for 10 seconds, 500% rated load for 1 second and 1000% rated load for 1 cycle. Operating efficiency shall be a minimum of 96%, typical at full load. Response Time: The protection unit shall respond to any line voltage variation in 1/2 cycle while operating linear or non-linear loads, with a load power factor of 0.60 of unity. Peak detection of the voltage sine wave shall not be permitted to avoid inaccurate tap switching due to input voltage distortion. Line Voltage Regulation and Correction Time: Output regulation shall be +5%, -6%, given an input voltage variation of -30% to +30% for nominal, when within +/-5% of the nominal frequency. The Micro card shall be equipped with both “Input Out of Range” , “Output Out of Range” indicators light shall be provided on the meter face to indicate that the input/Output voltage or frequency has exceeded acceptable limits. Metering: A digital input meter shall be provided to display line voltages, line currents, frequency, kVA, kW, and power factor. NOTES : 1. The Contractor has to submit Original Purchase Vouchers, Test Certificates & Guarantee Certificate before installation at site

JCC ENGINEERS PRIVATE LIMITED (BID ID -3458257)

Bidder Name

Ashoka Engineers

JCC ENGINEERS PRIVATE LIMITED