Electrical Machines
The direction of rotation of a 3 - Φ induction motor is clockwise when it is supplied with 3 - Φ sinusoidal voltage having phase sequence A - B - C. For counterclockwise rotation of motor, the phase sequence of the supply should be

 C - A - B.
 B - C - A.
 B - C - A or C - A - B.
  A - C - B.

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Electrical Machines
Skewing of the rotor in a 3 - Φ squirrel cage induction motor reduces

  noise and parasitic torque, but increase starting and pull-out torque.
  noise, parasitic and starting torque, but increase pull out torque.
  noise and pullout torque, but increase parasitic and starting torque.
  noise, parasitic torque, starting torque and pull out torque.

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