SPECIAL REPAIR/REPLACEMENT OF BER POWER TRANSFROMER AT 33/11 KV MRS AT AF STATION GORAKHPUR

M&L in replacement of outdoor end terminal joints cold shrinkable Suitable for HT 11000V (Earthed), XLPE insulated armoured Heavy duty under ground cable including joint kits and labour complete for making joints suitable for aluminium conductor cable of cross sectional area 120 Sqmm 3 Core complete all as specified and as directed.

Supply, laying , jointing and testing in replacement of HT XLPE cable 120 Sqmm 3 core, 11000 volt screened, PVC bedded "Earthed grade" insulated bedded, galvanised steel (Heavy duty) strip armoured with aluminium conductor 11 KV pressure earth system confirming to IS-7098(Part-I) 1977 and part-II of 1985 laid in pipe /ducts/trenches, under floor and road or fixedd to wall etc complete cross-sectional area of cable 120 sqmm 3 corecomplete all as specified and as directed.

S&F 80 mm bore galvanised iron pipe light grade with all fittings laid across road, in trenches or across PCC drain, along electric pole or floor/wall for cable protection with suitable size of MS clamps, nuts, botls and wahsers complete all as specified and as directed.

M&L for galvanised iron strip 32mmx6mm with base insulators and screws etc fixed on wall/ floor for extension of earthing lead. Complete all as specified and as directed.

M&L Cross-arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washer, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated/ directed and applying two coat of aluminium paint over a coat of red oxide primer complete all as specified and as directed.

S&F in replacement 33 KV single phase out door oil cooled CT of ratio 50-100/5+5 Amp class 1.0 – 5P10 burden 15 VA insulation level 70 KV/170 KV as per IS-2705 complete all as specified and as directed.

S&F in replacement 33 KV single phase out door oil cooled PT of ratio 33 KV/rt 3/110V/rt 3 Class 0.5-3, Burden 50 VA – 50 VA, insulation level 70/170 KV., voltage factor 1.2 Cont and 1.9 for 30 Sec, conforming to IS-3156 complete all as specified and as directed.

S&F in repalement 33 KV 400 Amp isolator out door type, three phase, double break, centre rotating type suitable for manual operation. Each pole of isolator shall be provided with two sets of contacts to be poperated in series and the moving contact blades shall rotate in horizental plane and galvanised steel frame operating pipe of 25mm bore medium grade GI pipe suitable for operation while standing on ground for 3 phase complete all as specified and as directed.

S&Fin replacement lightning arrester expulsion type complete with all fitting transmission class, discharge cap 65 kilo amp 33000 volt complete all as specified and as directed.

Supply and laying synthetic rubber insulated mats 3 mm thick for voltage upto 33 kv for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m complete all as specified and as directed.