Electrical Machines
In a star - delta starting of an IM

  reduced voltage is applied to the stator.
  resistance is inserted in the rotor.
  applied voltage per stator phase is 57.7 % of a line volt
  line voltage is 57.7 % of stator voltage.

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Electrical Machines
For an ideal transformer the winding should have

 no ohmic resistance on either side
 minimum resistance on primary side and maximum resistance on secondary side
 maximum resistance on primary side and least resistance on secondary side
 equal resistance on primary and secondary side

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