Electrical Machines
In case of 3 - Φ IM, plugging means

  pulling the motor directly on line without a rotor.
  locking of rotor due to harmonics.
  starting the motor on load which is more than the rated load.
  interchanging two supply phases for quick stopping.

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Electrical Machines
Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW?

 200 MW and 400MW respectively
 generator 2 gets over load
 230.7 MW and 369.23 MW respectively
 generator 1 gets over load

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