Question: In a three phase transformer, if the primary side is connected in star and secondary side is connected in delta, what is the angle

In a three phase transformer, if the primary side is connected in

In a three phase transformer, if the primary side is connected in star and secondary side is connected in delta, what is the angle difference between phase voltage in the two cases. (A) delta side lags by -30. (C) delta side leads by 30. (B) star side lags by -30. (D) star side leads by -30.

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