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The transformer is protected by a differential relay. The relay is connected to three phase transformer,...

The transformer is protected by a differential relay. The relay is connected to three phase transformer, 50 MVA, 22 kV/33 kV delta – star connection. The relay is connected in delta. The current transformer ratio is 1500/5 Amp at the lower voltage and 1000/5 Amp at the high voltage. Calculate the primary and secondary current of the relay and it’s the primary turns. State any assumption.

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