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根据有关规定，在施工现场专用的中性点直接接地的电力线路中，必须采用ＴＮ－Ｓ接零保护系统。保护接零是保护建筑施工用电线路及设备的重要设施，应很好理解工作零线（Ｎ）线与保护零线（ＰＥ）线的设置性质及使用的异同点，真正达到安全生产的目的。１工作零线（Ｎ）...
According to the relevant regulations, the TN-S zero-crossing protection system must be used in the power line directly grounded at the neutral point of the construction site. The protection of zero is an important facility for the protection of construction-use power lines and equipment. It should be well understood that the nature and use of the working zero (N) and protection zero (PE) lines must be set to achieve the goal of safe production. . 1Working zero line (N)...