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Electrical machines miscellaneous

Electrical Machines

  1. A 3 phase, 400 V, 5 k W, star connected synchronous motor having an internal reactance of 10 W is operating at 50% load, unity pf. Now, the excitation is increased by 1%. What will be the new load in percent, if the power factor is to be kept same? Neglect all losses and consider
    1. 67.9%
    2. 56.9%
    3. 51%
    4. 50%
Correct Option: A

NA



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