CA NO. CWE/HILLS/EWS/51 OF 2025-2026 REPAIR/ MAINT OF HT ELECT NETWORK, REPAIR TO TRANSFORMERS, HT CABLE, LIGHTENING ARRESTOR AT NARENDRA NAGAR, RUDRA PRAYAG AND HARSHIL UNDER GE 871 EWS

Amount

Excavation in trenches not exc. 1.5 m wide and not exc. 1.5 in depth for foundation of poles, stay assy etc. and getting out in hard / dense soil complete all as specified and directed.

Excavation in trenches not exceeding 1.5 m wide and not exceeding 1.5 mtr in depth for foundation. (Laying of under ground cables) in hard rock and getting out complete all as specified and directed.

Returning filling in including spreading levelling watering and well ramming in layers not exc. 25 cm thick each complete all as specified and directed

Removing excavated material to a distance not exc. 50 mtr and depositing where directed at a level not exc. 1.5 mtr above the starting point of any type of soil complete all as specified and directed.

M&L for spreading not exc 63 mm graded stone aggregate deposited, spread and levelled in layers not exceeding 15 cm thick throughout the substation open areas complete all as specified and directed.

M&L for PCC 1:2:4 type B-2 using 40 mm graded broken stone aggregate as in mass concrete in foundations etc complete all as specified and directed.

M&L for PCC 1:3:6 type C-2 using 40 mm graded broken stone aggregate as in mass concrete in foundations etc complete all as specified and directed.

M&L for Brick work with subclass ‘B’ bricks, straight or curved on plan exc 6m mean radius, built in cement mortar 1:6 including demolition of old brick work/ stone masonry complete all as specified and directed.

Supply & laying in replacement of GI tubing of 80 mm bore dia, light grade conforming to IS 1239 Part-I and ISI marked in trenches, across the road, on wall or pole including fixing arrangements, culvert etc of required length for cable protection complete all as specified and directed.

Supplying, erecting and fixing steel tubular swaged poles with cast iron base plate of size 300mm x 300mm x 6mm, finial taper plug, bolts, nuts & screws for type 410 SP-55 (11.0 metres long) including painting with two coats of aluminium paint over one coat of red oxide primer on all exposed surfaces and tarring with black bituminous paints to embedded portion in PCC and providing 3 Nos of 30cm wide circular bands with black & white paint starting from plinth level at a gap of 30 cm in between 2 bands and numbering of poles, in white paint over black painted back ground at a height of 2m from bottom of pole with 5 cm large bold letters 2" (inch) wide including dismantling of old pipe complete all as specified and directed. Note: Excavation, earth work, PCC in foundation and coping shall be measured and paid separately under relevant item of this schedule.

M&L for mild steel work (structural) as in cross arm bracing supports, clamps fabricated from structural steel section including nuts, bolts, washers, welding, bending, drilling holes for bolts in any size or shape as required and one primer coat with red oxide primer one under coat & one finishing coat of aluminium paint including dismantling of old one complete all as specified and directed.

S&F in repair pin type porcelain vitreous brown insulator 150 mm high including one galvanised mild steel spindle, two GI washers and one GI nut suitable for 11000 volts grade complete all as specified and directed.

S&F in repair disc type insulator, porcelain, vitreous 145 mm high & 255 mm dia ball & socket type brown, single disc assembly for tension with tension clamps for conductors of working voltage 11 KV complete all as specified and directed.

Supplying and fixing in repair loop type insulator, porcelain, vitreous white brown or green, large size with overall dimensions 90x140mm and clearance dia of hole 25.5 mm complete all as specified and directed.

M&L for galvanized stay strand of size 7/4mm all as directed complete all as specified and directed.

Supply and fixing in replacement stay assembly with 20mm dia stay rod complete with accessories as shown in Electrical plate No.1 complete all as specified and directed.(Loop type insulators, stay clamps, excavation and concrete measured separately.

Material and labour for ACSR conductor squirrel to dog (6/1/2.11 to 6/1/4.72) any size drawn straight horizontal on over head lines on existing poles including binding with insulators. Weight of conductor shall be measured straight horizontal distance between centre of two adjacent poles and calculating weight of conductor of size and length by adding 3% extra for sag ,jointing jumpers, including dismantling of old ACSR conductor etc complete all as specified and directed.

M&L for hard drawn GI wire 4 mm (8 SWG) dia for continuous earth wire on poles longitudinal / cross braces of cradle and pole guarding including dismantling complete all as specified and directed.

S&F in renewal air break switch outdoor type , triple pole mechanically operated, mounted on insulators and steel frame, with operating mechanism worked from ground level vertical/ horizontal mounting air break switch 11 KV, 200 amps consisting of hot dip galvanized channel iron base having 3 Nos 11 KV post insulators per phase, copper or copper alloy high pressure heavily tinned contacts plated MS arcing horn capable of breaking the magnetizing current with horizontal connecting bar GI pipe as down rod levers coupling and operating handle with locking arrangements manufactured as per IS : 9921 with and including operating rod of 25 mm bore medium grade GI pipe of suitable length to operate from ground level complete all as specified and directed.

M&L for replacement of lightning arrestor expulsion type pole mounting transmission class discharge capacity 65 K amps complete with three mounting brackets complete for HT 11 KV system complete all as specified and directed.

Supplying and fixing in repair indoor cable end terminal joint cold shrinkable type suitable for 3 core 11 KV grade XLPE insulated cable of size 50 to 95 sqmm complete all as specified and directed.

Supplying and fixing in repair outdoor cable end terminal joint cold shrinkable type suitable for 3 core 11 KV grade XLPE insulated cable of size 50 to 95 sqmm complete all as specified and directed.

Supply, laying in trenches or passing through pipe/ducts, fixed to wall or poles XLPE insulated screened PVC sheathed galvanized steel strip or wire armoured electric power cable with aluminium conductor of cross sectional area 95 Sqmm 3 core 11 KV rated suitable for earthed system including testing and commissioning including taking down of old u/s cable complete all as specified and directed. Note : (Excavation and earth work, sand cushioning brick covers and GI pipe etc shall be measured and paid separately.

M&L for earthing complete with galvanised steel, earth plate electrode 600x600mm x 6mm thick buried directly in ground vertically (earth pit not less than 2.25 mtrs below ground level ) with top edge of the plate not less than 1.5 mtrs below normal ground level connected to galvanised strip 32x6mm as earth lead by means of bolts, nuts, check nuts and washers of galvanised iron/steel all as shown in electrical plate No 3 on page 497 of MES schedule 2009 part - I connected to main switch board/main DBs/earthing test point including all necessary excavation and earth work in hard/dense soil common salt and charcoal dust mixed and packed 150mm thick all round the GI earth plate, watering pipe 20mm dia GI medium grade. GI sheet 0.63 mm thick funnel, wire gauge, 50mm thick RCC cover in PCC 1:2:4 type B1 duly reinforced with MS round bars 6mm dia @ 150c/c both ways and pit/chamber in PCC 1:3:6 type C1 with suitable lifting handle to cover, GI protection pipe 40mm dia light grade up to 7.5mtr from electrode GI pipe to be fixed with complete all as specified and directed. Note :- (i) Earth lead beyond 7.5 mtr from electrode to earth terminal point/main switch & GI pipe light grade 40mm dia for protection against mechanical damage to lead shall be measured separately. (ii) On testing after completion if desired earth resistance is not obtained, the earthing will be redone at no extra cost.

M&L for Restringing/restretching aluminium conductor on existing overhead lines including necessary binding with binding wire with insulator, connections of incoming and outgoing cables complete all as specified and directed.

M&L for painting of 11.0 m long swaged poles with cross arm/clamps with aluminium paint one under coat and one finishing coat after preparation of old steel surfaces including making of alternate colour bands red & white 30 cms width upto a height of 1.5 m from pole coping with synthetic enamelled paint & writing pole numbers on round base of 125 mm dia with yellow synthetic paint complete all as specified and directed.

S&F in renewal of post insulator 11 KV grade complete all as specified and directed.

Disconnecting and taking out the step down transformer, 11 KV/0.433 KV installed at Narendra Nagar, Rudra Prayag or Harsil, draining of oil, lifting the core & coil assembly, washing and cleaning dust, dirt & sludge deposit from all parts, servicing of tap changer, making internal connections and re-assembling the transformer after repair work, providing new cork sheet gasket packing 5 mm thick, nuts, bolts washers etc as required, transportation, loading, unloading from sub station to workshop & back including its installation at original or any other place, testing & commissioning complete for capacity 100 KVA to 250KVA complete all as specified and directed.

S&f in repair HV coil (11KV), wound with super enamelled copper wire of same gauge including necessary insulating materials and baking the coil in vacuum furnace upto 200 KVA capacity transformers complete all as specified and directed.

Reconditioning of copper wound MV coil (433 V) including necessary insulating materials, and baking coil in vacuum furnace upto 200 KVA capacity transformers complete all as specified and directed.

M&L in repair for opening up top cover of transformers installed in position, disconnecting connections and reconnecting after renewal of worn out / defective parts, welding /repairing the body if required to stop oil leakage, re fixing the top cover in position including new best quality cork sheet gasket (not less than 5 mm thick) complete for Transformer 100KVA to 220KVA. Note:- Renewal of worn out / defective parts not included.

S&F in repairs HV bushing of 12 KV grade with gasket suitable for transformer of capacities 100 to 200 KVA complete all as specified and directed.

S&F in repairs LV bushing of 1.1 KV grade with gasket suitable for transformer of capacity 100 KVA to 200 KVA complete all as specified and directed.

S&F in repairs HV brass set stem of 12 KV grade suitable for transformer of following capacity 100 KVA to 200 KVA complete all as specified and directed.

S&F in repairs LV brass set stem of 1.1 KV grade suitable for transformer of following capacity100 KVA to 200 KVA complete all as specified and directed.

M&L for preparation of old painted surface of transformer & painting with two coats of synthetic enameled grey paint complete for the capacity 100 to 200 KVA complete all as specified and directed.

M&L for filtration / dehydration of insulating oil of transformer on site to achieve dielectric strength 50 KV or above (when tested with 2.5 mm gap electrode) installed at Sila Garrison and different locations of 14 and 15 sectors and its units. complete all as specified and directed.

Supplying and filling for topping up of deficient oil level of transformers with new transformer oil after filtration / dehydration to achieve dielectric strength 50 KV or above complete all as specified and directed.

S&F in repair transformer breather assembly oil seal type made of cast aluminium body powder coated as per RAL 7032 shade filled with silica gel of capacity 500 grams complete all as specified and directed.

S&F in renewal oil level indicator clean prismatic type with necessary gasket etc in renewal suitable for transformer up to 200 KVA capacity complete all as specified and directed.

S&F in repair drop out fuse link 11 KV, 100 amps consisting of channel galvanized iron base, having 2 Nos 11 KV post insulators per phase including fuse carrier of SRBP tube with heavily tinned non ferrous metal parts & spring loaded phosphor bronze contact manufactured as per IS: 9385 complete all as specified and directed. Make - PACTIL / BHEL / ABB as approved.

M&L for sand cushioning to U/G cable in layers of 23cm thick (8 Cm before laying the cable and 15 cm thick after laying the cable) in trenches including watering and consolidation, complete all as specified and directed. Note: Only punned thickness 18 cm shall be measured and paid.

Supplying and laying old size bricks, common burnt clay building bricks sub class 'B' designation 75 laid in trenches over sand for cable protection complete all as specified and directed.

D K THUKRAL AND SONS (BID ID -3448570)