For a 500 Hz frequency excitation, a 50 km long power line will be modeled as long line
Answer : Impedance relays are used for phase faults on long line. ...
what is mean by long transmission line ? Answer : The transmission line which have length more than 250 km are known as long transmission lines. ...
If we change the excitation of synchronous machine will it affect on power factor? Answer : Yes, If we change the excitation of synchronous machine it will affect on power factor. If the synchronous motor is overexcited then it will have leading power factor and if the motor is underexcited then it will have lagging power factor. ...
What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: (A) Eddy Current and Hysteresis losses will be ... Current will be too much high (C) Transformer may start to smoke and burn (D) No effect Answer : What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: (A) Eddy Current and Hysteresis losses will be ... will be too much high (C) Transformer may start to smoke and burn (D) No effect ...
Answer : Yes, we can make the power factor of synchronous motor leading by adjusting its excitation. ...
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