SPECIAL REPAIRS FOR RATIONALIZATION OF BER DISTRIBUTION TRNASFORMERS AT ANARWALA AND GARHI CANTT UNDER AGE E/M- II OF GE DEHRADUN

Supply, installation, testing and commissioning of Transformer 200 KVA or next higher capacity as per manufacturer standard ratings, 11/0.433 KV, 3 phase, 50 Hz , Dyn 11 , outdoor ONAN type, copper wound, oil immersed naturally cooled, step down transformer with OFF circuit tap changing arrangement on HV side ( tappimg range + 7.5% in steps of 2.5% each ) with Vector group Dyn 11 and having cable end box on HV & LV side. The cable box at LV/HV side shall be suitable to house for proper size and capacity of incoming/outgoing Aluminium cable and to be provided with gland and gland plate. The transformer shall be provided with all standard accessories and first filling of filtered dehydrated tranformer oil of IS : 335 complete as per Specification and confirming to Energy efficiency level -3 of IS : 1180 (Part-I) -2014 with amendment No 4. The transformer shall be having following Standard accessories complete all as specified and directed :- (a) Name rating & diagrame plate - 01 Nos (b) Off circuit tap changing switch - 01 Nos (c) Earthing Terminals - 02 Nos (d) Lifting Lugs - 02 Nos (e) Oil level Indicator (flush tube ) - 01 Nos (f) Oil drain valve with plug - 01 Nos (g) Oil temperature gauge - 01 Nos (h) Aluminium body breather - 01 Nos (j) Vent pipe - 01 Nos Note :- Cost of any other accessories as per manufacturers instructions /IS provision shall be inclusive in the quoted rates.

All as per item No. 01 above but capacity 100 KVA or next higher capacity as per manufacturer standard ratings.

M&L for earthing complete with galvanised steel earth plate electrode 600×600x6mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less'than 1.5 metres below normal ground level, connected to galvanised iron earth stip 32x6 mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate of SSR 2009 (Pt-I) connected to earthing test point / transformer / panel and testing on completion including necessary exacavation and earth work in any type of soil, funnel, PCC chamber in 1:3:6 type C-1, RCC pit cover, charcoal, salt including provision of earth lead protected by 50mm dia light grade Gi pipe 20mm dia medium grade for watering complete all as specified and directed. Note:- (i) If the desired earth resistance is not found within permissible limit of less than 5 Ohm , earthing shall be redone by contractor without any extra cost . (ii) Cost of galvanised earth lead upto 7.5 mtr, 50 mm dia light grade GI pipe and 20 mm Dia medium grade Gi pipe for watering is included in the rate quoted for this item.

Supply, installing and testing gang operated air break swich 12 insulator type, HT 11KV, Ac 50 C/S , Triple pole, vertical mounting type, Mechanically operated form ground, mounted on 12 silicon rubber Insulator 11 KV grade and steel frame, current Rating upto 200 Amps complete with fuse mounting , fuse carriers and fuse elements of required capacity fixed on the pole structure on channel / Angle Iron /Cross arm with suitable GI nuts , bolts and washers etc. complete all as specified and directed.