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A 3-phase, 2300v ,250hp ,60Hz synchronous motor has Xs= 11 ohms per phase, when the input...

A 3-phase, 2300v ,250hp ,60Hz synchronous motor has Xs= 11 ohms per phase, when the input power is 165.8kw the power angle is 15 degrees electrical. Neglect all losses.

  1. Determine the excitation voltage, input current and power factor.
  2. Calculate the input current when the mechanical load is disconnected.
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