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The efficiency of a 400-kVA, single-phase, 60-Hz transformer is 98.77% when delivering full-load current at 0.8...

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Electrical Engineering

The efficiency of a 400-kVA, single-phase, 60-Hz transformer is98.77% when delivering full-load current at 0.8 power factor, and99.13% with half-rated current at unity power factor. calculate:(a) The iron loss. (b) the full-load copper loss. (c) theefficiency at 3/4 load, 0.9 power factor

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