SPL REPAIR TO ENERGY EFFICIENT TRANSFORMERS AGAINST BER TRANSFORMERS UNDER AGE (I) TALBEHAT AT MIL STN TALBEHAT

Amount

Supplying, installation, connecting, testing and commissioning of outdoor types distribution trasformer of 250 KVA , 11/0.433 KV, 3 phase, 50 Hz, ONAN cooled oil immersed copper wound step down energy saving (level 3) floor mounted complete with first filling ISI marked filtered & dehydrated transformer oil and other standard fittings / accessories and 7 position off circuit tap changer (tapping range +/- 7.5% in steps of 2.5% each) with vector group DYN -11 complete all as specified and as directed. Note - (i) The ambient temperature shall be 48 degree. Centigrade when measured by the resistance method after continous full load run. (ii) The transformer shall be complete with standard fittings all as specified and conforming to IS:335 of 1993 for oil and IS:1180 Part-I of 2014 for transformer and compromising of followings:- (i) One No cable box on LVside(secondary side) consisting of 04 Nos of porecelain bushing with bushing rods and another cable box on HV side(primary side) consisting of 03 Nos of porcelain bushing with bushing rods etc (ii) Oil conservator tank with filter type drain valve and oil level gauge. (iii) Oil level indicator with minimum and maximum marking (iv) Dehydration silica gelbreather assembly with first fill of dehydrating agent and oil seal. (v) Explosion vent diaphragm complete. (vi) Thermometer pocket on tank cover. (vii) Dial type thermometer vapour pressure having range 0-120 degree C with max reading pointer max temp indicator and re setting device. (viii) Rating plate with terminal marking. (ix) 02 Nos earthing terminal on tank and cover for fixing, earth strip of size 32x6. (x) Oil level gauge and oil drain filter valve. (xi) Lifting hook. (xii) Oil filler hole with cap /plug with connection complete. (xiii) Air relief valve plug. (xiv) Detachable roller 0-4 Nos (xv) Extra bushing for Neutral out side the cable cable box independent earthing for neutral earth. (xvi) First fill of fresh transformer oil confirming to relevant IS and tested up to 40KV die-electric strength.

M&L for Earthing complete with galvanized steel earth plate electrode 60cm X 60 cm x 6mm thick buried directly in ground (earth pit not less than 2.25m deep below normal ground level) with top edge of the plate not less than 1.5m below ground level earth plate connected with GI earthing strip (32x6mm) as earthing lead for transformer/feeder pillar box etc by means of bolts, nuts, check nut and washers of galvanized iron all as shown in Electrical plate No.3 of MES SSR part I and testing on completion including necessary excavation and earth work, adequate common slat, charcoal dust and funnel PCC (1:3:6) type C-1 pit with pre-cast RCC (1:2:4) type B-1 cover, 40mm thick reinforced with 6 mm dia bars, MS bar 3 Nos both ways funnel with 20mm dia GI medium grade watering pipe and earthing lead 40mm light grade protection pipe complete all as specified and directed.

Supply and Laying, XLPE insulated, screened, PVC bedded galvanized steel strip or wire armoured electric power cable (heavy duty) with aluminium conductor, 11000 volts earthed, FR, cross sectional area 95 sq mm all as specified and directed including taking down old one.

Supply and fixing cable end 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 95 sqmm complete all as specified and directed.