A 6.6 kV, 6 MVA Y-connected, 3-phase alternator has an effective ac resistance of 0.436 ohms between terminals. The field current of 103 A produces an open circuit emf of 6,600 V between terminals....

A 6.6 kV, 6 MVA Y-connected, 3-phase alternator has an effective ac resistance of 0.436 ohms between terminals. The field current of 103 A produces an open circuit emf of 6,600 V between terminals. The field current required to produce rated full-load current at the short circuit is 82 A. What is the ZS per phase?