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插头l和n分别是什么线
更新时间: 2020-10-31 14:21:25  

l指的是火线或者相线,n指的是零线。相线是为了方便动力的转换,主要是工业采用的是三相正弦交流电,这样的导线我们称之为相线或者火线。零线是变压器二次引出的线路,与火线是构成回路的,主要是对用电设备进行供电,零线可以起到双重保护作用。

关键词: 插头 别是 什么

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