CWE/AF AMB/AMB-45/2025-26 REPAIR MAINT OF VCBS TRANSFORMERS HT CABLE AND CONNECTED ITEMS AT AF STN PATIALA UNDER GE AF AMBALA

Amount

Excavation in trenches, not exceeding 1.5mtr wide & not exceeding 1.5mtr in depth; for foundation, laying/taking out pipes/cables etc. or for shafts, wells, cesspits, manholes, pier holes, etc. not exceeding 10sqm on plan & not exceeding 1.5mtr in depth and getting out, in soft/loose type of soil complete all as specified & directed.

Returning filling in including spreading levelling watering and well ramming in layers not exceeding 25 cm thick each in soft/loose type of soil complete all as specified & directed.

Removal of excavated soil to a distance not exceeding 50 mtr & depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified & directed.

M&L sand cushioning to cable with a layer of sand 8 cm deep before laying the cable and 15 cm deep after laying the cable (punned down to 18 cm depth after laying and stretching of cable ) complete all as specified & directed.

Supply & laying un-reinforced precast concrete cable cover , Class HVP type-1 with flat, size 300mm x 180mm x 40mm, laid flat for protection of cable, adjacent to each other, perpendicular to central axis of cable complete all as specified & directed.

M&L double wall corrugated (DWC) HDPE pipe, outer dia 120mm, having corrugations on the outer surface and plain at inner surface, confirming to IS 14930(Part I & II) as in trenches/under road/under floor including cutting road/floor and making good wherever necessary or fixed to wall/pole with fixing arrangement for cable protection complete all as specified & directed. Note: Excavation & Earth work shall be measured & paid seperately.

M&L boring/augering of holes under road, pavement, taxi track, hardstanding for passing/crossing pipes/cables upto size 80mm dia/bore at suitable depth (not below than 600mm) by any means using necessary machinery / equipments complete without damaging the surface and removing excavated soil /material to a distance not exceeding 50mtr including supply & inserting GI pipe 80mm bore medium grade complete all as specified & directed. Note: One RM of boring & one RM of GI pipe shall be measured as one unit.

M&L plain cement concrete (PCC) 1:4:8, type D-2, using 40mm graded mechanically crushed stone aggregates as in foundations, filling and mass concrete etc. complete all as specified & directed.

M&L plain cement concrete (PCC) 1:2:4, type B-1, using 20mm graded mechanically crushed stone aggregates as in coping to pole etc. including necessary formwork to exposed surface finished even & smooth complete all as specified & directed.

Taking out / down faulty, unserviceable 11KV HT UG cable from trenches/duct/ HT poles, nominal cross sectional area from 95 sqmm to 120 Sqmm including disconnecting of cable and taking out PCC covers of any description complete all as specified & directed. Notes: (i) Excavation & Earth work shall be measured & paid separately. (ii) Serviceable cable covers/bricks will be kept aside for re-use and the unserviceable one shall be credited to contractor.

Supply, laying, jointing, testing & commissioning heavy duty, HT 11 KV ( E), XLPE insulated cable with aluminium conductor, screened with extruded semi conducting layer, insulation screening with copper tape cover laid up with PVC (ST-2) extruded inner sheathed GI strip armoured PVC (ST-2) out sheathed, ISI marked confirming to IS-7098 (Part-II), Size cross sectional area 95 Sqmm & 3 core laid as in trenches/pipes/ducts or fixed along poles/wall/equipment etc. complete all as specified & directed.

Description all as per BOQ item No.11.00 here-in-above but Size cross sectional area 120 Sqmm & 3 core.

S&F in repair Cable jointing kit for 11 KV (Earthed) grade HT cable for indoor termination heat shrink type joint complete with jointing material & accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 Sqmm to 185 Sqmm complete all as specified & directed.

S&F in repair Cable jointing kit for 11 KV (Earthed) grade HT cable for outdoor termination heat shrink type joint complete with jointing material & accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 Sqmm to 185 Sqmm complete all as specified & directed.

S&F in repair Cable jointing kit for 11 KV (Earthed) grade HT cable for indoor termination heat shrink type joint complete with jointing material & accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm complete all as specified & directed.

S&F in repair Cable jointing kit for 11 KV (Earthed) grade HT cable for outdoor termination heat shrink type joint complete with jointing material & accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 Sqmm complete all as specified & directed.

S&F in repair Cable jointing kit for 11 KV (Earthed) grade HT cable for straight through heat shrink type joint complete with jointing material & accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 Sqmm complete all as specified & directed.

S&F in repair Cable jointing kit for 11 KV (Earthed) grade HT cable for straight through heat shrink type joint complete with jointing material & accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm complete all as specified & directed.

S&F 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 duly painted with two coats of aluminium paint over & including one coat of zinc oxide primer including dismantling of old unserviceable cross arms as existing complete all as specified & directed.

S&F Disc type insulator, porcelain, vitreous 145mm high and 255mm dia ball and socket type, white, brown or green, Two-in-series' assembly for tension with tension clamps for conductors, working pressure 11000 volts complete all as specified & directed.

Disconnecting electric connections of underground HT cable,11 KV, any size/type, from both sides and locating/detecting of pin point fault in cable with fault locating machine comprising impulse generator, acoustic fault locator & reflectometer (Laptop based) in the entire length with modern fault detector equipment by expert Engineers including reconnecting & commissioning the cable to make it functional complete all as specified & directed. Notes: (i) The work will be executed after obtaining proper shutdown from main power house after liasoning with Engineer-in-charge. (ii) The fault location machine / equipments shall be arranged as early as possible by contractor but not later than 12 hours after intimation from AGE/JE concerned , failing which a penalty of Rs. 500/- every 12 hours for every job shall be leived. (iii) Excavation and Earthwork shall be measured & paid seperately.

S&F in replacement 11KV Drop out fuse(set of three) single pole 200 Amp with insulators, barrel and suitable rating of fuse element as per site requirement complete all as specified & directed.

S&F in replacement lightening arrestor (set of three), expulsion type,11000 Volt, 65 kilo Amp discharge capacity with all fittings complete all as specified & directed. Note: The lighting arresters shall be of set of three

S&F in replacement switch Air break gang operated, triple pole, for horizontal or vertical operation, mechanically operated, outdoor type, mounted on 12 insulators and steel frame with operating mechanism & operating rod of 25mm bore, heavy grade GI pipe from ground level with & including locking arrangement & minumum 02 Nos. eye hook, 200 Amps current rating 11000 volts working pressure including making electrical connections to make it functional after testing complete all as specified & directed.

M&L in repair danger notice plate of 1.6 mm thick mild steel sheet, vitreous enamelled white, with letters, figures and conventional skull and bones in signal red colour, fixed with MS clamps, bolts and nuts on pole, for HT(11/33 KV) of 25cm x 20cm size confirming to IS 2551 complete all as specified & directed.

S&F in replacement Motor 230 Volts AC charged independent spring closing / tripping trip free operating mechanism with manual closing tripling push buttons and mechanical breaker “closed / open” spring charged / discharged indication complete all as specified & directed.

S&F in replacement Electrical releases coil, 24 volts DC complete all as specified & directed.

S&F in replacement Shunt trip coil, 24 volts DC complete all as specified & directed. .

S&F in replacement Auxiliary switch 32 Amp complete all as specified & directed. .

S&F in replacement 230 Volts AC single phase 80 watt rated strip type heater with toggle switch and thermostat complete all as specified & directed.

S&F in replacement 11KV metering CT, single core single ratio epoxy resin cast copper wound primary type with rate burden 5VA, class 0.5S confirming to IS-2705 complete all as specified & directed.

S&F in replacement epoxy resin cast CT dual core of ratio as per existing make and model 200/100/5-5A and of accuracy class 1.0, 5P, 10 burden 15VA for 11 KV as per relevant IS complete all as specified & directed.

S&F in replacement Potential transformer(set of three) ratio three single phase 11 KV/rt 3/110V/rt 3 class 0.5-3, with burden 50 VA and insulation level 28 / 75 conforming to IS – 3156 complete all as specified & directed.

S&F in replacement indication lamp (LED type) Red/Yellow/Blue/Green colour suitable for VCB etc. complete all as specified & directed.

S&F in replacement digital ammeter meter with shunt suitable for VCB 11000 volts , 400/630 Amp complete all as specified & directed .

S&F in replacement digital frequency meter with shunt suitable for VCB 11000 volts , 400/630/800 Amp complete all as specified & directed .

S&F in replacement TNC switch as per existing make & specifications suitable for VCB 400/630 Amps,11 KV including neccessary connection & testing complete all as specified & directed.

S&F in replacement closing coil assembly as per existing make & specifications suitable for VCB 400/630 Amps,11 KV including neccesarry connection & testing complete all as specified & directed

S&F in replacement Triping coil assembly as per existing make & specifications suitable for VCB 400/630 Amps,11 KV including neccesarry connection & testing complete all as specified & directed

S&F in replacement HV porcelain bushing of transformer(set of three) 12KV /250 Amp with metal parts brass as per IS 3347 (Part III) and IS 2009 complete all as specified & directed.

Shifting of defective transformer upto 160 KVA from sub station to MES yard and installation of serviceable transformer from other location, placing on foundation / floor, connecting HV / LV and earthing strip complete all as specified & directed. Notes :- (i) Distance of shiting ranges between 1.00 Km to 1.50 Km. (ii) All petty parts including nut, bolts, lugs for cable and any other minor works and material required for re-assembling are deemed to be included the rate quoted. (iii) The rate for transport and lifting of transformer by crane deemed to be included in the rate quoted. (iv) Oil testing of transformers deemed to be included in the rate quoted.

Material and labour for checking of LT & HT side of transformer and replacement of burnt or heated lugs/nuts & bolts, checking oil level, checking silica gel, checking jumpers and GOD and tightening if found loose complete fully fucctional of transformer complete all as specified & directed.

De-hydration & filtration of transformer oil by using dehydration and filtration plant by means of Ultra High Vaccum double stage machine to remove impurities from oil such as moisture, dirt, air and other gases at site of installation in running condition of transformer including testing the oil before and after centrifuging from top and bottom of transformer to achieve the Break Down Voltage(BDV) value minimum 60KV at 2.5mm gap between electrode withstand for one minute including filling in transformer of any capacity complete all as specified & directed. Notes:- (i) Dehydration will be carried out at site in presence of MES rep and contractor will submit the dehydration report of each transformer. A record should be maintained by the contractor and should submit with RAR. (ii) Oil Test value record register shall be prepared in presence of AGE/JE and handed over the register to sub division on completion of work.

Supply & filling transformer oil of dielectric strength not less than 60KV to comply with IS-335 of 1993 complete all as specified & directed.

Preparation of external surfaces of existing transformer of capacity 63 KVA to 160 KVA for painting including fins/radiators, removal of all existing paint/ rust/oil/grease and unwanted material and applying two coats of synthetic enamel metallic paint, smoke grey, by means of spray gun at site of installation of transformer including writing SM/MES number, capacity of transformer etc with black synthetic enamel paint complete all as specified & directed.

Supply & filling silicagel in granular form for transformer's air breather of capacity 63 KVA to 160 KVA complete all as specified & directed.

S&F in repair transformer top cover gasket for capacity upto 160 KVA complete all as specified & directed.

Supply only electrical rubber hand gloves ( Kamfet ?class-2 , Electrical Insulated Hand gloves), Proof Voltage 20000 Volt, Working Voltage 17000 Volt, as Per IEC 60903-2014, Red Colour, Size 8,9,10,11 / Length 360mm complete all as specified & directed.

Supply only fibre glass discharge rod suitable for 11 KV working pressure including all accessories complete all as specified & directed.

Supply & laying in replacement high voltage insulating synthetic mat confirming to IS 15652:2006 with high die-electric strength upto 11 KV, fire retardant, insulation resistance upto 100000 mega ohms, with 5000 volt megger, good mechanical properties to withstand load and movement of breakers / trolleys and associated electrical equipment, no adverse effect of Acid, Alkalis and transformer oil of required size and thichness not less than 2.5mm complete all as specified & directed.

M&L 25mm x 4mm galvanized iron(GI) strip as earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other situation for loop earthing etc. complete all as specified & directed.

Dismantling and taking out /down existing unserviceable GI strip 25mm x 4mm as in earth continuity conductor or main earthing lead complete all as specified & directed.

M&L earthing complete with galvanized steel earth plate electrode 60 cm X 60 cm, 6mm thick buried vertically in ground to depth not less than 2.25 mtr below ground level, with top edge of earth plate not less than 1.5 mtr below ground level, connected to GI earth lead strip 32mm x 6mm upto 7.5 mtr long by means of bolts, nuts, check nuts and washers of galvanized iron and connection to earthing test point & earth dolly & watering pipe GI 20 mm bore medium grade 1.5 mtr long including protection pipe GI light grade 40mm bore upto 7.5 mtr long, wire mesh, funnel,lugs, salt, charcoal dust, excavation & earthwork in any type of soil and refilling, pit chamber with PCC 1:3:6 type C-1 using 20 mm graded mechnically crushed stone aggregates , RCC 1:2:4 type B-1 using 20 mm graded mechnically crushed stone aggregates pit cover slab 50 mm thick reinforced with 8 mm dia TMT bars @ 15 cm c/c both ways including necessary form work all as shown in electrical plate No 3 of MES SSR Part-I, including testing on completion at site including dismantling/taking out/down of old existing earthing any type complete all as specified & directed. Notes:- On testing if the desired earth resistance(i.e. less than 5 ohm) is not obtained, earthing will be generated at No extra cost, till the desired earth resistance is obtained.

M&L preparation of surfaces and painting of steel tubular poles upto 1.5 mtr height from pedestal, with two coats of synthetic enamel paint in 30 cm wide strip (five strips), painting pattern shall be as per Airforce colour code including painting of pole coping with black paint and writing pole numbers with white paint on black circular base including marking of HT/LT with Painting of pole cross arms bracket with two coats of aluminum paint over & including one coat of red oxide primer complete all as specified & directed.

M&L winding of transformer any capacity at HT/LT side with super enamelled copper wire of gauge & weight as exists, varnishing & drying by vaccum impregnating, provinding insulating material, fixing the coil in the position in core assembly and making connection as per original pattern complete all as specified & directed.

S&F in replacement PVC air breather of make & specifications as exist at site filled and with & including silica gel suitable for upto 100 KVA capacity transformer complete all as specified & directed.

Description all as per BOQ item No. 62.00 here-in-above but exceeding 100 KVA & upto 163 KVA capacity transformer.

S&F in replacement temperature gauge 0-100 degree celcius range round type complete all as specified & directed.

Repair and maintenance of existing transformer plinth suitable for installation of 120 to 160 KVA transformer, including complete electrical disconnection of existing transformer, relocation and lifting of transformer from plinth, including complete repair of plinth with proper civil works including brick work, PCC 1:2:4 type B2 using 20mm graded stone aggregate as in hard standing including painting to fencing work complete all as specified & directed. For Credit Schedule, refer tender documents. The amount of credit schedule shall be deducted from total quoted amount of BOQ to arrive contract sum.

bharat contrectors (BID ID -3487654)

SWAMI ENGINEERS (BID ID -3493878)

The Rahul Vig (BID ID -3492015)