CA NO CWEAFJ-32/2025-26 REPAIR AND MAINT OF TRANSFORMER HT CABLE AND ITS CONNECTED ITEMS AT AIR FORCE STATION PATHANKOT UNDER GE (AF) PATHANKOT

Amount

Excavation in trenches n.exc 1.5m wide and n.exc 1.5m deep and getting out in any type of soil for laying of cable complete all as specified and directed by Engineer-in-charge.

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

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

Sand cushioning to the underground cables using new dry river sand laid in trenches 8cm thick below the cable and 15cm thick above the cable after laying and stretching the cable complete, punned to 18cm, complete all as specified and directed by Engineer-in-Charge. Note : Punned thickness of 18cms shall be measured for payment.

M&L for Sub Class 'B' brick covering protection to the electric cable laid dry flat transversally along the length of cable on sand cushioning with width equal to length of brick all as specified and directed by Engineer-in-Charge.

M&L for PCC 1:3:6 type C-2 (using 40mm graded crushed stone aggregate) for foundation of poles / stays etc all as specified and directed by Engineer-in-Charge.

M&L for PCC 1:2:4 type B-1 (using 20 mm graded crushed stone aggregate) as in coping including necessary form work finishing the cement concrete surfaces even & smooth using extra cement all as specified and directed by Engineer-in-Charge.

Dismantling of unserviceable ACSR conductor of any size from existing over head lines complete all as specified and directed by Engineer-in-Charge.

Dismantling of GI earth wire and guard wire from existing LT/HT OH lines complete all as specified and directed by Engineer-in-Charge.

Dismantling of cross arms of MS fabricated complete with all accessories i.e. nut, bolts, washer etc. complete all as specified and directed by Engineer-in-Charge.

Dismantling of unserviceable stay assembly complete with all accessoriescomplete all as specified and directed by Engineer-in-Charge.

Taking down carefully old unserviceable LT/HT Insulator any type existing over head lines complete all as specified and directed.tapping screws etc complete all as specified and directed by Engineer-in-Charge. Note:- Work will be Execute up to 10 m height.

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 complete all as specified and directed by Engineer-in-Charge.

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 complete all as specified and directed by Engineer-in-Charge.

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 120 Sqmm complete all as specified and directed by Engineer-in-Charge.

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 95 Sqmm complete all as specified and directed by Engineer-in-Charge.

Supply and fix cable end jointing kit for 11 KV grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 50 to 95 Sqmm complete all as specified and directed by Engineer-in-Charge.

Supply and fix cable end jointing kit for 11 KV grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 120-185 Sqmm complete all as specified and directed by Engineer-in-Charge.

Supply and fix cable End jointing kit for 11 KV grade cable for Indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 50 to 95 Sqmm complete all as specified and directed by Engineer-in-Charge.

Supply and fix cable end jointing kit for 11 KV grade cable for Indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 120-185 Sqmm complete all as specified and directed by Engineer-in-Charge.

Supply and fix cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 70 sqmm to 95 sqmm complete all as specified and directed by Engineer-in-Charge.

Supply and fix cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 sqmm to 185 sqmm complete all as specified and directed by Engineer-in-Charge.

Transporting to burnt out transformer for repair to workshop, and any type of T& P will be required for shifting of transformer will be provided by Contractor and Strip opening of transformer and removing the top cover for repair, and taking out the burnt out core alongwith HT/LT coil (windings) assembling the core after replacement of HT/LT coils heating varnishing, testing and housing accessories in transformer body and connection up filling in dehydrated transformer oil and connection with existing electrical system HT/LT and commissioning complete on load of capacity not exceeding 200 KVA. Note :- Transformer oil and HT/LT windings will be measured and paid separatily).

All as per item No 24 above but above 200 KVA and upto 800 KVA as specified and directed by Engineer-in- Charge..

Winding of HT/LT coil of different type, capacity and make of transformer with approved quality super enameled copper wire/ strips of approved make of suitable gauge and number of turns alongwith allied materials like cork sheet, fibre glass insulations, paper insulations, cotton/ empire tap and tube wooden blocks bolts, nuts and washer (Brass) soldering and other packing material etc. all as required at site or directed by Engr-in-Charge.

Reconditioning of LT coil of aluminium/copper wound transformer by torning the old paper insulations, straightening the entire LT Strip, providing new paper insulations of superior quality and making coil of suitable design as original complete all as specified and directed by Engineer-in-Charge.

Replacement of defective worn out HT bushing rod (stud)complete made of brass with nuts and washers oil seal including threading at both ends for HT bushing of transformer outdoor/in door of various sizes up to 200 KVA as per site requirement complete all as specified and directed .

Description all as per serial item No 28 above but exceeding 200 KVA not exceeding 800 KVA complete all as specified and directed.

Replacement of defective worn out LT bushing rod (stud) complete made of brass with nuts and washers oil seal including threading at both ends for LT bushing of transformer outdoor/indoor of various sizes as per site requirement up to 200 KVA capacity transformer complete all as specified and directed.

Description all as per serial item No 30 above but exceeding 200 KVA but not exceeding 800 KVA complete all as specified and directed.

Replacement of silica gel breather assembly complete with silica gel complete upto 800 KVA transformer all as the sample approved /site requirement all as specified all as directed

Replacement of silica gel in existing breather assembly up to maximum level of transformer upto 800 KVA complete all as specified and directed by Engineer In Charge. Note - Replacement of Silica gel in one transformer will be consider as one job.

Top gasket made of 3mm thick cork sheet with suitable holes for transformer including providing suitable size of bolts, nuts and washer for transformer top cover complete for any capacity upto 200 KVA complete all as specified and directed by Engr-in-Charge.

Top gasket made of 3mm thick cork sheet with suitable holes for transformer including providing suitable size of bolts, nuts and washer for transformer top cover complete for any capacity above 200 KVA and upto 800 KVA all as specified and directed by Engineer-in- Charge.

S & F temperature gauge circular dial type of standard size and dia suitable for transformer upto 800 KVA as specified and directed by Engineer-in- Charge.

Supply and top up / refilling of insulating transformer oil conforming to IS 335 1993 latest amendments for replacing the oil in transformers with breaking capacity not less than 45kv all as specified and directed .Make of transformer oil : Savita, Power oil , petrol Ltd or equivalent.

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 relevent item of schedule.

Periodical maintenance of air break gang operated switches capacity 200 Amps fixed on two pole structure /four pole structure after taking down proper electric shut down with all precaution from MPH tightening all jumpers, PG clamps , connection after taking proper shut down with all precaution including painting all steel structure by applying two coat of synthetic enamel paint over a coat of primer , greasing and repair male and female contact, wire mesh strip, drop out fuses , locking arrangement by unscrewing nuts, bolts including all connected item to be replaced etc complete all as specified and directed by Engineer-in-charge

Supply pin type polymer insulator including one galvanised mild steel spindle,two galvanised iron washers and one galvanised iron nuts of size 150 mm height and 150 mm dia suitable for 11000 volts grade voltage pressure complete all as specified and directed by Engr-in-Charge.

Disc type insulator, Polymer single disc assembly for 11000 volts complete all as specified and directed by Engr-in-Charge.

Supply and fix shackle type polymer insulator including galvanised mild straps, washers insulator,bolts wahsers and nuts of size 100mm height and 115 mm dia suitable for 1100 volts grade complete all as specified and directed by ortar 1:3, as in backing layer without using extra cement complete all as specified.

S & F tap changer mechanism for varing HT voltage in steps for transformer capacity n exc 200 KVA complete all as specified and directed by Engr-in-Charge.

S & F tap changer mechanism for varing HT voltage in steps for transformer capacity above 200 KVA and upto 750 KVA KVA complete all as specified and directed by Engr-in-Charge.

M & L to find out fault in HT line bring/call fault finding machine equipment and find out fault in any size HT UG Cable including excavation, returning filling & disconnecting of cable connection from both side panels/poles and necessary excavation to reach upto cable and making space for cable joint and fault must be rectified within 72 hrs complete all as specified and directed by Engr-in-Charge. Note:- (i) Cable required at site same size of faulty cable if required for jointing purpose will be paid in relevant item. (ii) Jointing material will be paid in relevant Item.

Preparation of old painted surface of transformer by scrubbbing out cleaning and painting with two coats of spray paint & one coat primer Heat resistant metallic smoke grey paint complete metallic painting including writing MES No on transformer body with black paint for the following capacity transformer complete all as specified and directed by Engr-in-Charge.

Transformer 63 KVA to 100KVA.

Transformer 150 KVA to 250 KVA.

Transformer 300 KVA to 800 KVA.

Supply, fixing, jointing and connecting galvanised wire of size 4 mm dia including proper binding complete all as specified and directed by Engineer-in-charge

Supply, fixing, jointing and connecting aluminium conductor, steel reinforcement including proper binding complete all as specified and directed by Engineer-in-charge

Scraping of old paint from steel tubular pole of 11 mtr height with out removing accessories and preparation of surfaces for repainting . Repainting the pole with one coat of alternative white and red straps of 30 cm each upto 1.5 mtr height using synthetic enamell paint .Repainting the remaining pole and clamps GI bkt etc above 1.5 mtr height by applying one coat of alumn paint all as required at site or directed.

Re-stretching of 03 nos aluminium conductor and 02 GI wire measured as one span any size and length complete including removing kinks and providing new binding wire /Jumper where required all as specfied and directed by Engineer-in-charge.

M&L guard cradle hexagonal/rectangular of 4mm dia GI wire bent to shape with binding wire 22 guage GI wire for road crossing etc complate all as directed by Eng-in-charge

S&F GI tubing light grade 80 mm bore galvanised iron with all fittings and fixed to poles, walls etc. with flat iron clamps/GI / bolts/nuts/washers or laid in floors/under roads complete including sealing material all as specified and directed of the following bores complete all as specified and directed .

S&F GI tubing light grade 100 mm bore galvanised iron with all fittings and fixed to poles, walls etc. with flat iron clamps/GI / bolts/nuts/washers or laid in floors/under roads complete including sealing material all as specified and directed of the following bores complete all as specified and directed .

S&F GI tubing light grade' 50 mm bore galvanised iron with all fittings and fixed to poles, walls etc. with flat iron clamps/GI / bolts/nuts/washers or laid in floors/under roads complete including sealing material all as specified and directed of the following bores complete all as specified and directed .

Repair to existing platform for installation of transformer size with brick masonry work in cement 1:4,including repair by replacement Xpm jali on angle iron 50x50x6 mm post and painting to steel suitable two coats of syntechic enamel paint with locking arramgements, over a coat of primer and two coats of colourwashing over a coat of white wash on plastered surface complete all as directed by Engr In Charge.

S & F stay assembly for steel tubular poles including GI clamps bolts, nuts, washers, galvanized steel stay rod 20 mm dia 180 cm long bow 400x14mm nuts/bolts, washers all galvanized and two nos thimble, loop insulator of size, stay plate of size 230x230x6mm including necessary excavation and earth work any type strata PCC 1:3:6 type C-2 using 40mm graded crushed stone aggregate in foundation and disposal of surplus soil, upto 50 M all as specified and shown in plate No 1 of MES SSR Pt -I, and as per site requirement stay wire included all as specified and directed by Engineer-in-Charge.

M&L for earthing complete with using galvanized mild steel earth plate (electrode) 600 mm x 600 mmx 6 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 4 mm dia GI earth lead wire as earth lead moulded and riveted to earth plate at one end and connected to main equipment at switch/control board at another end, GI earth lead duly protected in and including 15 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-I 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 GI strip 32/6 mm and 40mm dia pipe medium grade upto 7.5 mtr shall be included in the rate quoted for this item

M&L for earthing complete with using galvanized mild steel earth plate (electrode) 600 mm x 600 mm x 6 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 32X6 mm GI earth 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, GI earth lead duly protected in and including 50 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 GI strip 32/6 mm and 40mm dia pipe medium grade upto 7.5 mtr shall be included in the rate quoted for this item

Supply and errection of cross arms,bracings supports, clamp, and back plates febricated from structural steel section including nuts,bolts,washers welding,bending cold or hotdrilling holes for bolts in any shape or size as indicated complete all as specified and directed by Engr-in-Charge.

M & L for Galvanised stay strand of size 7/4 mm stay wire complete all as specified and directed by Engr-in Charge.

M & L for Lopp type insulator large size,with over all domensions 90 mmx140mm,clearance of hole 25.5 mm all as specified and directed by Engr-in-charge.

Supplying, installing, testing and commissioning of air break switch (GOD)(12 insulator type) HT 11 KV, AC 50C/S, TP Horizontal mounting type, mechanically operated from ground, mounted on 12 insulators 11 KV grade and steel frame, current rating upto 200 Amps complete with fuse mounting, fuse carriers and fuse elements of required capacity fixed the pole structure on channel angle iron cross arm with suitable GI nut bolt & washers etc with suitable size including testing complete and one pad lock 65 mm (Godrej/navtal)including dropout expulsion type fuses with barrels of reqd capacity to suit load at site including with two keys and disconnecting and taking down unserviceable GOD complete all as specified and directed by Engr-in-Charge..

Supplying, fixing and testing expulsion type lightning arrestor having rated voltage 11 KV and discharge current 65 KA suitable for 11000 Volt with mounted on MS plate 8 mm thick duly painted with aluminum paint bottom of size of lightning arrester including connection with earth strip connecting device and disconnecting and taking down unserviceable lightning arrestor complete all as specified and directed by Engr-in-Charge.

M&L for Trimming/ pruning of tree branches upto 3 meters below & both sides to obtain clearance all around the LT over head lines / HT over head lines conductor upto 3 meter from furthest conductor on pole including removing of cut branches and cleaning of site complete all as directed. Note - Gap between One Pole to another pole is considerd as one single span.

Moving contact of gang operated device any type and Capacity complete all as specified and directed by Engr-in-Charge.

Fix contact for gang operated device any type and capacity complete all as specified and directed by Engr-in-Charge.

Supply and fixing HT Fuse element 22 KV fibre glass type suitable for following:-

11 KV 10 Amps

11 KV 20 Amps

11 KV 30 Amps

11 KV 40 Amps

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

M&L in replacement of earth continuity conductor or earthing lead fixed to wall on batten 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 by Engr-in-Charge.

Supply only aluminium lugs of size 95 Sqmm complete all as specified and directed.

Supply only aluminium lugs of size 120 Sqmm complete all as specified and directed.

Supply only aluminium lugs of size 150 Sqmm complete all as specified and directed.

Supply only aluminium lugs of size 185 Sqmm complete all as specified and directed.

Supply only aluminium lugs of size 240 Sqmm complete all as specified and directed.

Supply and laying course stone aggregate ,grading I,90 to 40 mm size or grading 2,63 to 40 mm size in out door sub stations complete all as specified and directed. Note:- Stone aggregate will be laid after doing anti grass treatment.

Taking down old U/S Cable of any type and size 50 Sqmm to 120 Sqmm complete all as specified and directed.

Taking down old U/s cable jointing kits of any size complete all as specified and directed.

Taking down old U/S earthings any type complete all as specified and directed.

kailu construction co (BID ID -3462368)

Vijay Kumar Contractor and Engineers (BID ID -3460206)

M/s bhuri and sons (BID ID -3461890)

Ashoka Engineers (BID ID -3465194)