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为什么火线和零线间有电压
更新时间: 2020-09-19 00:00:00  

火线:提供220伏电势。零线:提供0伏电势。接地线:与大地相接,用于将电器外壳的静电引入大地,避免人接触外壳产生危险。也是0伏。因此火线与零线之间220伏,与接地线220伏。零线与接地线没电压。因为用途不同,所以才分为零线与接地线。

关键词: 为什么 火线 电压

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