Which one of the following statements is not correct in respect of synchronous machines?
A. In salient pole machines, the direct-axis synchronous reactance is greater than the quadrature axis synchronous reactance.
B. The damper bars help the motor to self start.
C. Short-circuit ratio is the ratio of field current required to produce the rated voltage on open circuit to the rated armature current.
D. The V - curve of a synchronous motor represents the variation in armature current with field excitation at a given output power
Show Answer
Answer: C
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