SPECIAL REPAIRS TO UNDERGROUND HT OH POWER LINE OVER RAILWAY TRACK FROM MRS NOFRA TO AIRPORT TWO POLE STRUCTURE UNDER GE (NW) VASCO

Amount

Excavation in trenches 1.5 Mtr wide and not exc 1.5 Mtr depth for laying UG cable getting getting out in hard rock complete all as specified and directed.

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

Removal of surplus soil excavated material to a distance not exceeding 50 Mtr above the starting point complete all as specified and directed.

M&L for XLPE insulated , armoured heavy duty electric cable with aluminum conductor, 1100 Volts grade, cross sectional area 95 Sqmm 3 core complete all as specified and directed.

S & F of RCC floor mounted 4 feet 11KV Cable route marker endorsed with "HT 11 KV UG Cable" duly painted with red on Top & black on bottom portion and including PCC (1:2:4) for fixing type B2 complete all as specified and directed.

Taking down old unsv switch air break gang operated device 11000 volts and supply & install Switch air brak, gang operated triple pole mechanically operated mounted on 15 Nos innsulator and steel frame outdoor type suitable for vertical installation single break provided with locking arrangement consisting of MS channel HT post type insulator copper alloy high pressure assembly with drop out fuses operating rod of 20 mm dia GI pipe medium grade for operating from 1.5 m above GL, complete conforming to IS-1318 of 1972 rated voltage 11 KV and current rating 200 Amps S & F of RCC floor mounted 4 feet 11KV Cable route marker endorsed with "HT 11 KV UG Cable" duly painted with red on Top & black on bottom portion and including PCC (1:2:4) for fixing type B2 complete all as specified and directed.

S & F in repairs drop out (DO) fuse unit expulsion type outdoor suitable for HT 11 KV, comprising of insulators, steel base mounting frame , GI nut bolts etc , HT type fuse complete all as specified and directed.

Supply and fix in repairs Galvanised Iron cross arms channel, bracing, support, claimps etc fabricated structured steel, sections, including nuts, bolts,washers etc and cutting to required length beat to any shape drilling holes, fixed on poles or jointed by means of elect welding complete incl taking down/dismantling the old items complete in any sub station/ installations structure complete all as specified and directed by Engr-In-Charge. At Sunset park road side four pole structure and Varnapuri sub stn complete all as specified and directed.

S & F cable jointing kit for 11 KV (Earthed) 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 sqmm to 95 sqmm complete all as specified and directed.

S & F cable jointing kit for 11 KV (Earthed) 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 sqmm to 95 sqmm complete all as specified and directed.

Supply and lay Double walled corrugated pipe (DWC ) confirming to IS 14930 heavy duty 110/95 mm bore for cable protection as a guard pipe including required accessories etc. Complete as specified and directed.

M & L for Earthing complete with galvanised copper plate 600×600×3.15 mm thick buried directly in ground earth pit not less than 2.25 metres deep below normal ground level with top edge of the plate not less than 1.5 metres below normal ground level connected to copper strip size 20×3 mm thick by means of nuts/bolts, check nuts and washers of brass as shown in electrical plate No. 5 of SSR part-I including necessary exacavation and earth work, GI pipe 15 mm bore light grade for watering with Funnel, wire mesh and protection to earthing strip shall be provided with GI pipe light grade 32 mm dia up to 7.5 Mtr from the earth plate electrode and refilling of soil including adeqate quantity of charcoal dust and comman salt etc & earth work in any strata, PCC pit chamber in cement mortar1:3:6 type C-2 with 40 mm thick Precast RCC cover slab 1:2:4 type B with 8 mm dia TMT bar and handle with lifting hooks including testing any type complete all as specified and directed.

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, 25x20 cm size complete all as specified and directed.

Taking down old rusted cross arm channels ,insulators & ACSR conductors complete all as specified and directed.

Supply, install ,testing and commissioning SF6 insulated compact Outdoor type R.M.U. rated voltage 11 KV,rated current 630 A, short circuit breaking current 16 KA and making capacity 40 KA ,fully arc proof metal enclosed, free standing, floor mounting, flush fronted type consists of Electrically operated non draw out type SF6 module-2 Nos load break switches (Incomers) and 2 No. Vaccum circuit breaker (outgoing) with integrated relays and related CTs as specified below, cable switch module and an interlocking mechanism with the earthing switch all as specified and directed. Degree of protection shall be per manufacturer specifications. (a) Fixed type voltage indicators and electronic short circuit indicators for simple fault indication (b) Resin cast CT with ratio 50-100/1A with 2.5VA burden class0.5 for metering and class 5 P10 for protection-Set of three (c) Resin cast potential transformers with ratio 11KV/1.732, 110V/1.732, 50 VA class1 with HT fuses mounted on with drawable rack (d) Self powered microprocessor controlled numeric relay comprising of three over current , one earth fault protection relay with high set for both phase & earth and with fault memory, universal auxliary supply (e) Trip circuit supervision relay

DURGAI ELECTRICALS

Shree Ayyappa Engineering

Shree Ram Enterprises

RAVINDRA BROTHERS

MARINE ELECTRICAL AGENCIES

NATIONAL ENGINEERING CORPORATION