Electrical Engineering > GATE 2018 > Transformers
A 3-phase 900 kVA, 3 kV / (3 / √3) kV (∆/Y), 50 Hz transformer has primary (high voltage side) resistance per phase of 0.3 Ω and secondary (low voltage side) resistance per phase of 0.02 Ω. [cite: 107] Iron loss of the transformer is 10 kW. The full load % efficiency of the transformer operated at unity power factor is _______ (up to 2 decimal places).
Correct : 97.20
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