SPECIAL REPAIRS AND REPLACEMENT OF BER TRANSFORMER AT NAVY NAGAR UNDER GE NW NAVY NAGAR COLABA MUMBAI

Amount

Supply, installation, testing and commissioning of Transformer double wound, step down, 11000/433 volts, oil type, minimum 630 KVA capacity or next nearest higher capacity as per OEM design, conforming to Energy Efficency Level -I as per amendment No 04 of IS Code 1180 (part-I) : 2014, ONAN, Dyn 11, core type with copper conductor.Transformer shall be provided with Off circuit Rotary type tap switch so as to provided for a voltage adjustment on H.V, from +5% to -5% (in step of 2.5%) of rated voltage of 11000 volts in 4 equal steps (5 position) to obtain rated voltage of 433 volts on LV side including cable box on LT and HT side, with 12 KV system highest voltage at HV side, 28 KV (rms) HV power frequency, 75 kVp HV impulse withstand voltage, trasnformer shall be designed for losses as per IS 1180 (Part-3) : 2021 and for 110% continuous overfluxing withstand capaibility, complete with first fill of new transformer oil having dielectric strength not less than 60 KV, suitable mounting arrangement complete and other standard accesssories : (a) 12kV off circuit tapping switch. b) Oil conservator tank with drain plug and filling cap. c) Silica gel dehydrating breather charged with silica gel d) Oil level gauge. e) Oil filter valve. f) Oil drain valve. g) Thermometer pocket (with oil temp. indicator) h) Diagram and rating plate. j) Two earthing arrangements.k) Lifting lugs. l) Four bidirectional plain roller m) Air vent plug. n) Explosion vent. o) Cable box on H.V side. p) Cable box on L.V side. q) Additional neutral terminal brought outside the LV cable box for earthing. r) HV&LV cable boxes. s) Buchholz relay. t) Radiator valves. u) Oil temp. indicator. v) Winding temp. indicator w) Magnetic oil level gauge. x) Inspection Cover. y) marshalling box. all as per IS:1180 (Part 3) : 2014-2021 specification.

Supply and fix cable jointing kit, End Termination Joint indoor for 11KV (earthed) grade cable complete with Jointing material (Heat shrinkable) and accessories suitable for 3 core XLPE armoured, alluminum conductor cable of size 95 to 185 sq mm complete all as specified and as directed by Engineer-in-Charge.

Material and labour for earthing complete with copper earth plate electrode 600 X 600 X 3.15 mm thick buried directly in ground (earth pit not less than 2.25m deep below ground level) with top edge of the plate not less than 1.5m below normal ground level connected to copper earth strip 25 X 3 mm by means of bolts, nuts and washers of copper or brass upto the test point all as shown in electrical plate No.3 of SSR Part-I connected to Existing earth strip including PCC earth pit with CI cover, GI funnel with wire mesh, GI protection pipe of 40 mm dia for earth lead and 20mm GI pipe for watering, excavation and earth work in any type of soil, filling the pit with charcoal and common salt surrounding the earth plate complete all as specified and directed by Engr-in-Charge including testing on completion.

RAVINDRA BROTHERS

Veer High Tech Solution

Chakshu Enterprise

C S Sharma and Co

MONA GENERATOR SEVICES PVT. LTD.