A 200-kVA, 480-V. 50-Hz, Y-connected synchronous generator with a rated field current | of 5 A was tested, and the following data were taken:
- OC test-Terminal voltage = 540 V at rated field current of 5 A
- SC test-Line current=312 A at rated field current of 5A
- DC test - DC voltage of 10 V applied to two terminals, a current of 20 A was measured.
- The equivalent circuit of the synchronous generator is shown in Figure QL.
(a) Calculate the speed of the generator in r/min.
(b) Calculate the generated emf per phase.
(c) Calculate equivalent circuit parameters (armature resistance and synchronous reactance) at rated field current of 5 A.
Find the values of the armature resistance and the approximate synchronous reactance in ohms that would be used in the generator model at the rated conditions.
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