Give the specification of three phase transformer as per IS 1180(Part-1) 1989.

Give the specification of three phase transformer as per IS 1180(Part-1) 1989. 
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Answer :

Specification of 3-phase transformer: 1) kVA rating of transformer 2) Voltage ratings for the primary and secondary voltages 3) HV and LV currents 4) Operating frequency of the transformer 5) % impedance of transformer 6) Allowable temperature rise. 7) Wiring instructions for HV and LV windings/terminal diagram 8) Model number and serial number of the transformer 9) Weight of the transformer 10) Information related to the tap changer 11) Transformer vector group 12) Winding connection diagrams 13) Type of cooling 14) Insulation class 15) Name of the manufacturer 16) Weight of core 17) Weight of winding 18) Volume of oil in litres.

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