有人误触了低压带电体,可能会发生生命危险。但有时为了不间断线路供电,在低压电路上带电工作甚至在没工具的情况下徒手处理故障,特别是在超高压线上带电作业,虽然看到火花闪,听到放电声,但还是工作轻松自如。你也曾会发现鸟停在高压线上安然无事,这是为什么呢? 要回答这个问题,首先应知道触电就是电流通过了人体。特别是心脏,使人体组织受电击、电伤,从而伤害了管理心脏和呼吸机能的脑神经中枢,使呼吸停止,造成死亡。为了不受电击、电伤,就得想方设法阻隔电流不通过人体构成闭合回路,人就不会触电,自身就安全。不让电流通过人体,就是人体不为电流搭桥。要堵三条通路,即一条路是相电流经人体与另一相电源相通;二条路是相电流经人体与大地相通（即指自来水管、墙壁与大地）;三条路是电流经人体与零线相通。只要堵住这三条路,人就不会触电。 如何堵住这三条通路呢?人们在长期的生产实践和科学实验活动 Some people mistakenly touched the low-voltage charged body, may be life-threatening. But sometimes for uninterrupted power supply, working on the low-voltage circuit live work even in the absence of tools to handle problems, especially in the EHV line live operation, although the sparkle flash, hear the discharge sound, but still work easily . Have you ever noticed that birds stay calm on high voltage lines? Why? To answer this question, you should first know that an electric shock is the passage of current through the human body. Especially the heart, so that the body tissue by electric shock, electrical injury, thus hurting the management of the heart and respiratory function of the central nervous system, so that breathing stops, resulting in death. In order to avoid electric shock, electric injury, you have to find ways to block the current does not pass through the body to form a closed loop, people will not be electrocuted, their own safety. Do not allow current through the body, that is, the human body is not for current bypass. To block the three access roads, that is, one road is the phase current through the human body and the other phase power connected; two road phase current through the human body and the earth communicate (ie, water pipes, walls and the earth); three road current through the body and the zero line Interlinked. As long as blocking the three roads, people will not be electrocuted. How to block these three channels? People in the long-term production practices and scientific experiments