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Q. The readings of open circuit, short circuit, and DC bridge tests of 500 V, 50 kVA, 60 Hz three-phase Y-connected alternator are given

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Q. The readings of open circuit, short circuit, and DC bridge tests of 500 V, 50 kVA, 60 Hz three-phase Y-connected alternator are given below: Open Circuit Terminal Voltage E (V) Short Circuit Current 1. (A) Field Current I, (A) Test Type DC Bridge 125 250 370 500 544 640 146 220 - 5 10 15 20 25 30 Voltage (V) Current (A) 10.6 26.5 [A] Determine the armature resistance. [B] Determine the unsaturated synchronous reactance at the rated terminal voltage.

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