SPECIAL REPAIRS REPLACEMENT OF HT 11 KV OVERHEAD LINE WITH HT 11 KV UG CABLE INCLUDING ALLIED WORKS IN DIFFERENT ZONE AT MILITARY STATION AGARTALA

Amount

Excavation in trenches not exceeding 1.50 m wide and n. exc 1.5 m in depth for foundation of poles, cable etc, or for shafts, wells, cesspits, manholes, pier holes, 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 as directed.

ditto- all as per item No 1.00 above but for depth exc 1.5m but n.exc 3m and -ditto

Returning, filling in, of soil including spreading leveling, watering and well ramming in layers not exceeding 25 cm complete all as specified and directed .

Removing excavated material to a distance n. exc. 50M and deposited/ spreaded where directed at a level n. exc 1.5 M above the starting point complete all as specified and as directed .

Materials and labour for sand filling around the cable with approved quality coarse sand for sand cushioning of under ground cable including spreading and punning down complete all as specified and as directed. Note:- Punned down thickness shall be measured.

Materials and labour for brick protection cover to underground cables with sub class ‘B’ over burnt brick of size 23 X 11.5 X 7.5 cm, (locally available best quality), laid dry and flat abutting each other with gaps not exceeding 10mm complete all as specified and directed.

Supplying, Laying connecting & testing of XLPE insulated, PVC sheathed, armoured HT electric power UG cable (heavy duty with stranded aluminum conductor) of size 95 Sqmm, 3 core, 11000 Volts(Earthed) grade, confirming to IS-7098 (Part-II) laid through duct/ pipe / in trench etc. with cable glands & suitable size of aluminium lugs complete all as specified and as directed. Note : Earth work, brick protection and sand cushioning and GI Pipe Shall be measured and paid separately under respective item.

Material and labour for HT 11 KV (Earthed) grade heat shrinkable end termination jointing kit outdoor type complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm including taking down old unserviciable jointing kit complete all as specified and as directed.

Material and labour for HT 11 KV (Earthed) grade heat shrinkable jointing kit straight through complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm including taking down old unserviciable jointing kit complete all as specified and as directed.

Dismantling of undersize / defected cross arms of M.S. channel or angle of any sections complete all as specified and as directed.

Materials and labour for cross arm 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 including apllying two coats of aluminium paint over a coat of red oxide zinc chrome primer complete all as specified and as directed.

Material and labour for anti-climbing device, spike type fabricated from structural steel comprising of MS flat 20mmx6mm, MS round bar pointed, 8mm dia, 20cm length welded on MS flat fixed with nuts, bolts, washers and welding with and including painting with two coats of aluminium paint over a coat of red oxide zinc chrome primer complete all as specified and as directed.

Material and labour for galvanised stay strand of size 7/4mm complete all as specified and as directed.

Supply and fixing of Loop type insulator, vitreous porcelain, white, brown or green, large size, with overall dimensions 90 x 140mm, clearance of hole 25.50mm complete all as specified and as directed.

Material and labour for HT lightning arrestor, expulsion type complete with all fittings, transmission class, discharge capacity 65 Kilo Amps suitable for 11 KV including taking down old unserviciable lightening arrestor complete all as specified and as directed.

Dismantling of existing unserviceable/undersize ACSR conductor (of any size) , jumper from overhead line, removing unserviceable materials from site of work complete all as specified and as directed.

Dismantling of old unservicable/damaged stay assembly embedded in concrete including demolition of PCC upto ground level and removing unserviceable materials from site of work complete all as specified and as directed.

Material and labour for Stay assembly 20mm dia complete with all accessories as shown in electrical plate No. 1 of SSR Part-I (loop type insulator, stay clamps, excavation and concrete shall be measured and paid separately under respective items) complete all as specified and as directed.

Dismantling old unservicable steel tubular poles/struts, any size including breaking up PCC foundation and removal of rubbish complete all as specified and as directed.

Supply and fixing of steel tubular swaged pole, type 410 SP 55 (Overall length 11.00 meter) conforming to IS-2713 (Part 1 to 3) 1980 complete with cast iron base plate, finial taper plug, bolts, nuts and washers, screws. Pole shall be painted with two coat of black bituminous throughout internally and externally upto planting depth and the remaining external portion shall be painted with two coats of aluminum paints over a coat of red oxide zinc chrome primer, painting red & yellow alternate strips of 30cm each externally from ground level upto 1.5m with synthetic enamel paint, and writing pole No with black paint on yellow background complete all as specified and as directed. (Note: Excavation and earth work and PCC shall be measured and paid separately under respective items)

Dismantling of DO fuse assembly including insulators complete all as specified and as directed.

Material and labour for expulsion type drop out fuse single pole mounted on insulator for 11000 volt and current rating above 50 Amps and upto 100 Amps complete all as specified and directed.

Dismantling of air break gang operated switches vertical/ horizontal mounted including insulators and operating mechanism of any size and type complete all as specified and directed.

Supply, installation and testing of tripple pole mechanically operated Air-break isolator (GOD), vertical mounting rotating type, mounted on insulator and steel frame with operating mechanism worked from ground level complete in all respect such as gun metal moving contacts and spring loaded fixed jaws, knife copper jumper strip etc, suitable for 11 KV grade, 50 Hz, rating upto 400 Amps with 9 insulator complete all as specified and directed.

Material and labour for PCC (1:4:8) type D2 (using 40 mm graded stone aggregate) as in foundation filling and mass concrete complete all as specified and as directed.

Material and labour for PCC (1:2:4) type B1 (using 20mm graded stone aggregate) as in coping and like including necessary formwork complete all as specified and as directed.

Supply and laying GI tubing 80mm bore light grade with fittings for protection of LT underground cables and fixed complete to walls/ceiling or laid in floors complete all as specified and as directed.

Material and labour for boring of hole under roads with mechanical arrangement for 80 mm dia GI tubing without disturbing the top surface of the road for passing the cable across the road complete all as specified and as directed.

Material and Labour for HT cable route indicator of 100mm dia CI plate duly engraved (cable HT 11 KV), bolted with 40x6mm flat MS angle iron member of height 1.00 mtr and embeded in PCC (1:2:4) Type B-1 (using 20 mm graded aggregate) of size 20cm x 20cm x 30cm block including necessary earthwork complete all as specified and as directed.

Material and labour for earthing complete with galvanized steel earth plate electrode 60cm x 60cm x 6 mm thick buried directly in ground vertically to a depth not less than 2.25 metre below ground level with top edge of the earth plate at a depth not less than 1.25 metre below ground level, earth plate surrounded by 15cm thick and packed with layers of charcoal dust and common salt, earth electrode GI strip 25 x 4 mm dia connected to GI earth plate electrode by means of bolts, nuts, check nuts and washers of galvanized iron and thimbles and other end of earth wire connected to main switch board and protected by galvanized iron light grade 40mm bore and GI pipe 20mm bore medium grade with funnel and wire mesh for watering including necessary excavation and earth works. concrete earth pit in PCC (1:3:6) type C-1 (with 20mm graded aggregate), 50mm thick precast RCC (1:2:4) cover slab (re-inforced with 8mm dia TMT bar @ 15 cm C/C bothways and suitable handle made of 10mm dia) and all as shown in Electrical Plate No. 3 of SSR (Part-1)of 2009. including taking down old unserviciable earthing set complete all as specified and as directed. Notes:- (i) Main earthing strip from earth plate electrode to rest point upto length of 7.5 meters length shall deemed to be included in the unit rate quoted against this item. (ii) On testing after completion if the desired resistenance is not obtained the contractor shall redo the earthing without any extra cost to the department.

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