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Which of the following losses are negligible in blocked rotor test?

  • Mechanical losses & Iron losses are negligible in blocked rotor test.
  • The reason for this assumption is that the rotor is locked, and as a result, there is no mechanical motion of the rotor, so there are no mechanical losses.
  • Since the frequency of the power supply is reduced to a low value during the blocked rotor test, the iron losses are negligible due to the low flux density in the iron core.