DETAILED SPECIFICATION OF TRANSFORMER

Supply of 3 phase, 630kVA, 11kV/433V, 50 Hz outdoor type, copper wound, plinth mounted, delta / star connected, DYn11 vector group, oil immersed, naturally oil cooled, core type transformer, with no load Voltage ratio of 11000 /433 Volts, an off load tap changing switch with locking arrangements and which is operated externally with Voltage variation of +5.0% to -10.0% in steps of 2.5%. Transformer shall be suitable for operation in an ambient up to 50ºC and shall be supplied with suitable neutral terminal on LT side and all accessories such as silica gel breather, Buccholtz’s relay, with alarm and trip contacts, magnetic oil gauge, conservator, dial type oil temperature indicator, winding temperature indicator, cable end boxes with disconnecting chambers for the 11kV side and cable end box with disconnecting chambers for 433V side for testing of transformers, earthing terminals, explosion vent, drain valve with plug, inclusive of first fill of oil as per IS335 (with latest amendments). The radiators should not be of integrally welded type; but with flange and bolted connections for affording removal of (Pressed type) radiators alone after closing valve. The cable box of HV side should be suitable for terminating of XLPE cable with indoor type end termination affording sufficient clearance so as to optimize creepage distance in order to avoid flashover with body and it shall have disconnecting chamber and LV side suitable for terminating of XLPE cable with indoor type end termination. The transformer shall conform to IS-1180(with latest amendments) in all respects like insulation levels, temperature rise, impedance Voltage and losses. The transformer should be mounted on 4Nos. of bidirectional wheels and shall have marshalling box. The transformer shall be tested for routine tests specified in the IS 1180, before dispatching transformer in presence of Department representatives.

Details of 315kVA Transformer for Buy back

Make:The Indian Transformers Ltd.

Rating:315kVA

Voltage: HV-11000VLV-433V

Current: HV -16.5A LV- 420A

Year of manufacturing:1984

Sl.No: 7905

General Terms & Condition

  1. Preferred make of transformer shall be any one from the following:

PETE-Hammond / Areva (Schneider) / Voltamp / Bharat Bijlee /

Indo Tech / ECE Industries Ltd. / Essenar / KEL / Kavika.

  1. Dealership/authorization certificate from OEM is to be submitted along with offer in case of firm is not a manufacturer.
  1. Technical data sheet of offered transformer is to be submitted along with offer.
  1. Transformer should be delivered within 4 months from the date of issue of order.
  1. The transformer shall be guaranteed for 18 months from the date of supply or 12 months from date of commissioning whichever is earlier.