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電動機的機械專用電機功率計算方法。
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大功率電動機中的過載保電機修理護中幾款電流互感器的應用。
電流互感器原理是依據(jù)電磁感應原理的。電流互感器是由閉合的鐵心和繞組組成。它的一次繞組匝數(shù)很少，串在需要測量的電流的線路中，因此它經(jīng)常有線路的全部電流流過，二次繞
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