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A 200kVA, 480v, 50Hz, star connected synchronous generator with a rated field current of 5A was...

A 200kVA, 480v, 50Hz, star connected synchronous generator with a rated field current of 5A was tested at rated speed and the following data were taken:

1. The open circuit terminal voltage of the generator was 540v at rated field current.

2. The short circuit line current was 300A at rated current.

3. With the machine at standstill, a dc voltage of 10v was applied between two of the generator terminals, a current of 25A was measured.

Determine the values of the armature reactance and the synchronous reactance for the generator equivalent circuit.

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