【共同学*】【電気版20160223】

2016-02-23View Original

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参加報酬：2財富。正解の報酬：9富。三相四線式の低圧ユーザーにおいて、引込線の入口部にある中性線の補助接地の役割は（）。　　A. 単相接地電流の増加　　B. 家電の焼損防止　　C. 接地抵抗の低下

Reply #22016-02-23

三相四線式の低圧ユーザーにおいて、引込線の入口部にある中性線の補助接地の役割は（B）です。　　A. 単相接地電流の増加　　B. 家電の焼損防止　　C. 接地抵抗の低下

Reply #32016-02-23

Reply #42016-02-23

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【共同学*】【電気版20160223】

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