In case one phase of a three-phase synchronous motor is short-circuited the motor will____________?
Correct answer: A. not start
- A. not start
- B. run at 2/3 of synchronous speed
- C. run with excessive vibrations
- D. take less than the rated load
Explanation
A short-circuited phase creates severe current imbalance and prevents the motor from developing normal rotating-field conditions for starting. Thus, in the intended starting condition, the motor will not start.
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