A main generator is being connected to an infinite power grid that is operating at 60 Hz.
Generator output voltage is equal to the grid voltage but generator frequency is at 57 Hz.
Which one of the following generator conditions is most likely to occur if the generator output breaker is closed with voltages in phase (synchronized), but with the existing frequency difference?
(Assume no generator breaker protective trip occurs.)
A. Reverse power
B. Underfrequency
C. Undervoltage
D. Overspeed
Show Answer
Answer: A
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