问题

When paralleling two AC generators, the frequency of the machine coming on－line, immediate

When paralleling two AC generators, the frequency of the machine coming on-line, immediately prior to closing its breaker, should be _____.

A.slightly less than the oncoming generator frequency

B.the same as the bus frequency

C.slightly greater than the bus frequency

D.the same as the bus voltage

请帮忙给出正确答案和分析，谢谢！

参考答案

您可能感兴趣的试题

When paralleled, AC generators must have the same _____.

答案解析
The load between two steam－driven alternators operating in parallel may be adjusted by varying .

答案解析
There are two parallel school systems in Britain for primary and secondary education.（

答案解析
The division of the kilowatt load between two AC generators operating in parallel is contr

答案解析
AC and DC generators are similar in that they _____.A.both generate alternating voltagesB.

答案解析
It _____ for an emergency generator to require paralleling.A.is usualB.is not usualC.is ne

答案解析