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1. |
A small 3-phase induction motor has a short-circuit current 5 times of full-load current and full-load slip 5%. If starting resistance starter is used to reduce the impressed voltage to 60% of normal voltage, the starting torque obtained in terms of full load torque would be |
A. | 30% |
B. | 45% |
C. | 55% |
D. | 80% |
Answer» C. 55% | |