The torque developed in the cage induction motor with autostarter is___________?
Correct answer: C. K2 x torque with direct switching
- A. k/torque with direct switching
- B. K x torque with direct switching
- C. K2 x torque with direct switching
- D. k2/torque with direct switching
Explanation
If the autotransformer voltage ratio is k, motor starting current and torque are reduced, with starting torque becoming k² times the direct-on-line torque. Thus the torque reduction follows the square of the voltage ratio.
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