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

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

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Electrical Machines
In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting

  negative sequence currents are generated.
  the damper bars develop synchronous motor torque.
  the damper bars develop induction motor torque.
  the damper bars develop induction generator torque.

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