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A 150 MVA, 22/220 KV transformer has p.u. resistance of 1.2% and reactance of3.5%.The magnetizing impedance...

A 150 MVA, 22/220 KV transformer has p.u. resistance of 1.2% and reactance of3.5%.The magnetizing impedance is 136.6+ 185j p.u. The transformer supplies the rated current at 0.92 PF.

Find the Equivalent circuit referred to the secondary.

Find the Voltage regulation

Find the copper losses and the core closes of the transformer.

Find the efficiency of the transformer.

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