A generator is protected by restricted earth fault protection. The generat ratings are 13.5kV, 10 MVA. The percentage of winding protected against phase to ground fault is 85%. The relay setting is such that it trips for 20% out of balan Calculate the resistance to be added in the neutral to ground connection.
Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
A generator is protected by restricted earth fault protection. The generat ratings are 13.5kV, 10 MVA. The percentage of winding protected against phase to
ground fault is 85%. The relay setting is such that it trips for 20% out of balan
Calculate the resistance to be added in the neutral to ground connection.
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