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Questions and Answers
What is the starting current of an induction motor at the time of starting?
What is the starting current of an induction motor at the time of starting?
- 200% to 350% of the full-load current
- 400% to 800% of the full-load current (correct)
- Less than 100% of the full-load current
- Equal to the full-load current
What is the relationship between the effective rotor resistance at starting and at rated slip?
What is the relationship between the effective rotor resistance at starting and at rated slip?
- R2 is negligible at starting
- R2 is greater at starting compared to its value at rated slip, R2/s
- R2 is very small at starting compared to its value at rated slip, R2/s (correct)
- R2 is equal at starting and at rated slip
What may be affected by excessive line voltage drop due to high starting current?
What may be affected by excessive line voltage drop due to high starting current?
- Starting torque
- Rotor speed
- Operation of other machines on the same power source (correct)
- Motor efficiency
What is independent of the rotor resistance in an induction motor?
What is independent of the rotor resistance in an induction motor?
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What determines the starting torque of an induction motor?
What determines the starting torque of an induction motor?
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