單項選擇題

Prior to closing the breaker when paralleling two AC generators, the recommended practice is to have the frequency of the incoming machine （）

A.slightly less than the line frequency
B.the same as the line frequency
C.slightly greater than the line frequency
D.All of the above

你可能感興趣的試題

單項選擇題

Which of the following should be the FIRST step in removing a generator from parallel operation?（）

A.Trip the generator off the switchboard
B.Turn off all electrical equipment
C.Remove the load from the "off going" generator
D.Increase the cycles of the generator staying on the line

單項選擇題

Electrical power is expressed in （）

A.ohms
B.volts
C.amps
D.watts

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Prior to closing the breaker when paralleling two AC generators, the recommended practice is to have the frequency of the incoming machine （）

你可能感興趣的試題

Which of the following should be the FIRST step in removing a generator from parallel operation?（）

Electrical power is expressed in （）

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