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When any one-phase of a 3-phase synchronous motor is short-circuited, the motor will?

  • When any one-phase of a 3-phase synchronous motor is short-circuited, the motor will refuse to start.
  • If the short circuit is severe enough to cause a significant imbalance in the magnetic field, the motor may not start at all.
  • In this case, the motor will draw excessive current and overheat, which may damage the motor winding insulation or other components of the motor.
  • However, if the short-circuit is not severe, the motor may still start but with reduced performance.
  • The motor will run at a reduced speed and torque because the shorted phase will not contribute to the magnetic field, resulting in an unbalanced field.
  • If the short-circuit is not severe, the motor may still start but with reduced performance.
  • The motor will run at a reduced speed and torque because the shorted phase will not contribute to the magnetic field, resulting in an unbalanced field.
  • In either case, it is essential to address the short circuit promptly to prevent further damage to the motor.