If a 3-phase induction motor is started when one of the phases is not available, then the motor
A. will hum but not start.
B. will continue to operate satisfactorily on load below 57.7% of rated load if brought up to speed by some external means.
C. will operate under reduced load but usually with considerable vibrations in case of wound rotor motor is brought up to speed by some external means.
D. start and operate at a lower speed.
E. all of the above except (D).
Show Answer
Answer: E
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