随着我国经济的迅速发展和用电的不断增长,近几年电气火灾次数呈上升趋势。在配电系统中,良好的接地可以降低接触电压,防止电击事故,但人们对接地设置不善引起的火灾危险则认识不足。事实上,用电设备完善的保护接地措施不但对减少电击事故、保护人身和设备安全非常重要,而且对防止电气火灾十分重要。 一、低压接地故障的概念及危害 低压接地故障是指相线与地或与地有连接的导体之间的短路。这些导体 With the rapid economic development in our country and the continuous growth of electricity consumption, the frequency of electrical fires has been on the rise in recent years. In distribution systems, good earthing can reduce the contact voltage and prevent electric shocks, but people are not fully aware of the danger of fire due to poor grounding. In fact, the protective earthing measures of electrical equipment are not only very important for reducing the accidents of electric shocks and protecting the safety of people and equipment, but also of preventing the electric fire. First, the concept of low-voltage ground fault and damage Low-voltage ground fault refers to the phase and ground or with the conductor is connected between the short circuit. These conductors