水电厂低压电动机空载或失压成组自启动时’厂用低压母线电压不应低于()。A.80%;B.70%;C.65%;D.55%。

作者: rantiku 人气: - 评论: 0
问题 水电厂低压电动机空载或失压成组自启动时’厂用低压母线电压不应低于()。
选项 A.80%; B.70%; C.65%; D.55%。
答案 C
解析

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