SPECIAL REPAIRS/REPLACEMENT (M and O) OF EXTERNAL ELECTRIC SUPPLY AT MRC AREA UNDER GE WELLINGTON.

Amount

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m in depth and getting out in soft/loose soil for laying of under ground cable and foundation of poles etc., complete all as specified and as directed.

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

Removal of excavated surplus soil not exceeding 50m and depositing where directred at al level not exceeding 1.5m above the starting point and complete all as specified and as directed.

Supply and spreading clean dry sand as cushioning for cable protection in trenches/ducts complete all as specified and directed. (Note: The punned down thickness shall only be measured)

M&L for brick sub class 'B' to be laid over dry sand cushinoing in trenches as protection to cable complete all as specified and as directed.

Supply and lay 80mm bore, GI pipe, light grade as cable protection laid in trench/floor, fixed on wall/pole etc complete all as specified and as directed.

Taking down the transformer of outdoor type 11 KV/433 V, 250 KVA capacity by disconnecting all electrical terminal, earthing and base mounting conection and removing the transformer to store yard/ substation for keeping in safe custody for reuse at site complete all as specified and as directed.

Supply, installing, testing and commissioning of transformer of capacity 400 KVA step down out door type copper wound vector group Dyn 11, 11/0.433 KV (at no load) AC 3 phase 50 Hz on secondary side double wounded oil immersed naturally air cooled with externally cooling tubes/radiator (delta connected as on primary and star connected with neutral on secondary side) having tapping at (+) 5% to (-) 10% of HV in step of 2.5% as per latest IS-1180 (Part-I) 2014 changed by hand operated OFF Load tap changing gear, the maximum temperature rise not exceeding 40 degree centigrade in oil and 45 degree centigrade in HV/LV winding when measured by the resistance method after continuous full load on ambient temperature of 50 degree centigrade and the ttransformer conforming to IS:1180 (Part-I) and IS 2026 Part-II 2014 amended upto date and comprising of following accessories:- (a) 3 Nos porcelain HV bushing with arching horns on HV side suitable for 11 KV complete with bushing rods, nuts and washers etc. (b) 01 No cable box on LV (Secondary) side consisting of 04 nos porcelain bushing with bushing rods, nuts and washers with cable gland suitable for reception. (c) Oil conservator tank with filter type drain valve and oil level gauge. (d) Dehydrating breather assembly with first filling of Silica gel. (e) Explosive vent. (f) Thermometer packet on tank cover.

(g) Two nos earthing terminals on transformer body to facilitate fixing of 32 x 6 mm GI strips. (h) One no thermometer dial type, vapour pressure type having rang 0-120 degree centigrade with maximum temperature including needles of tempereture gauge maximum reading pointed terminal. (j) Rating and terminal marking plates. (k) Oil level gauge. (l) Oil filling port on top cover with plate. (m) Air release valve/plug. (n) Lifting lugs. (o) 4 nos plain soild cast steel detachable rollers. (p) Extra bushing for neutral outside the cable box for providing independent earthing for neutral. (q) first filling of new transformer oil conforming to relevant IS and tested upto 60 KV dielectric strength at 2.5 mm gap. (r) Losses at 50% and 100% load at 75 degree centigrade shall not exceed 1100 watt and 3275 watt as defined in IS: 1180 (Part-I) 2014, level - 1, All routine tests as per IS:2026 (Part-II) shall be carried out at Factory premises and tests report shall be provided. (s) Cooling radiators. (t) Filter valves.

Supply install test and commission LT Panel board, TPN 415 volts, 50 Hz, 1000 Amps capacity out door cubical type floor mounted factory made double door dust and vermin proof, IP-54, fabricated out of CRCA sheet not less than 3.15 mm thick for outer fame and with 2mm thick for internal compartment duly powder coated with 7 tank process fixed on angle iron pedestal made out of 50x50x6mm with cable chamber for incoming and outgoing connections comprising for the following including necessary PCC foundation of minimum 0.35m height positioned and fixed with suitable nut, bolts, washers etc to the MC pedestal and connecting all incoming and out going cables complete all as specified and as directed:- (a) INCOMING:- MCCB 3 Pole and Neutral Link, 36 KA, 630 Amps 415 volts - 1 No (b) OUTGOINGS:- (i) MCCB 3 Pole and Neutral link, 25 KA, 250 Amps 415 Volts - 2 Nos (ii) MCCB 3 Pole and Neutral link, 25 KA, 200 Amps 415 Volts - 1No (c) 1000 Amps aluminium busbar for phase and 500 Amps for neutral duly insulated with PVC sleeves RYB mounted on heavy duly epoxy insulators in separate compartment - 01 Set. (d) Digital multi function panel meter for measuring voltage, Amps and Frequency with suitable CTs and back up protection - 1 No. (e) LED type Indicationlamp 240 Volts Set of three - 1 Set.

Taking down old unserviceable LT UG cables of any size for laying new cables complete all as specified and as directed.

Supply and lay in trench, in road, in pipe, fix on wall LT UG Cable, XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) 1100 volts grade with stranded aluminium conductor of size 3.5 core 240 sq mm complete all as specified and as directed.

All as per Item No 12 hereinbefore but for Cable of size 3 1/2 Core 185 Sq mm complete all as specified and as directed.

All as per Item No 12 hereinbefore but for Cable of size 3 1/2 Core 120 Sq mm complete all as specified and as directed.

Earthing complete with galvanised steel earth plate electrode 60cm x 60 cm x 6mm thick, buried directly in ground (earth pit not less than 2.25 meters deep below ground level) with top edge of the plate not less than 1.5 meter below normal ground level, connected to galvanised earth strip 32x6mm as earthing lead by means of bolts, nuts, check nuts and washers of galvanised iron or steel complete with GI pipe light grade 40 mm dia as earth lead protection pipe, GI pipe medium grade 20mm dia for watering pipe with funnel and wire mesh, PCC chamber with 10 cm thick RCC cover all as shown in electrical plate no 3 connected to earthing test point all as specified or indicated including testing on completion complete all as specified and as directed.

rvelectricals