PROVIDING OF 250 KVA OIL COOLED TRANSFORMER AGAINST BER AT BSF CAMPUS TALLIGURI OF 62 BN BSF UNDER SHQ BSF CBR

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Supplying , installation, testing and commissioning of 250 KVA Transformer, 11/0.415 KV, Oil cooled, off circuit tapping: +5% to -5% @ 2.5%,5( five position tap switch),Dynll vector group or equivalent, out door type, 3 phase Distribution transformer. rated voltage ( HV winding 1100 volt and LV voltage 415 volt), rated current ( HV winding 13.12 AMP and LV winding 347.80 AMP) type of cooling ONAN, max temp 50 deg C and min temp 4 deg C, avg temp 40 deg C, average humidity 90%, temp rise ( TOP oil 50 deg C, Winding 55 deg C) terminal arrangement ( HV side- bare bushing and LV side cable box ) insulation level class "A", base insulation level in KV (power frequency HV side 28 and LV side 3,lighting impulse HV side 75 and LV side NA, loss at principal tapping (no load loss 540 W +/- IS tolerance load loss at 75 deg C - 4500 W +/- Tolerance, no load current with in 2% of full load current ) impedance voltage at rated current & principal tapping (4.5%+/- IS tolerance), bus trunking arrangement on LV side complete with all accessories i/c first filling of filtered dehydrated oil and confirming to IS 2026( Part 1 to Part 5) & as per specification attached complete in all respects including transportation etc. as required at site.