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GATE Electrical 2012 | Question: 46

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The locked rotor current in a $3$-phase, star connected $15$ kW, $4$-pole, $230$ V, $50$ Hz induction motor at rated conditions is $50$ A. Neglecting losses and magnetizing current, the approximate locked rotor line current drawn when the motor is connected to a $236$ V, $57$ Hz supply is

  1. $58.5$ A
  2. $45.0$ A
  3. $42.7$ A
  4. $55.6$ A

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