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A 3-phase, 40 MVA, 13.8 kV, 60 Hz, ?-connected alternator requires field current of 250 A...

A 3-phase, 40 MVA, 13.8 kV, 60 Hz, ?-connected alternator requires field current of 250 A to produce an open circuit rated voltage while a field current of 150 A is required to produce short circuit rated armature current. Neglect armature resistance. Determine the Synchronous Reactance (Xs).

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