我国低压配电系统常见的有IT、TT、TN-C、TN-S、TN-C-S几类系统.当电气设备因绝缘损坏而发生漏电或击穿时,平时不带电的金属外壳及与之相连接的其他金属部分便带有电压.人体触及这些意外的带电部分时,就可能发生触电事故.减少或避免这类触电事故的技术措施有保护接地、保护接零、装设漏电保护器等.%The common low-voltage distribution systems are IT, TT, TN-C, TN-S, TN-C-S system types. When electrical equipment insulation damage due to leakage or breakdown occurred when they were not charged with the metal casing and other metal parts connected to it with a voltage. Live human touch on some of these accidents, the electric shock accident may occur. Reduce or avoid electric shock accidents such technical measures to protect earth, protect access to zero, the installation of earth leakage protection devices, etc.
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