煤矿井下环境条件和生产条件都十分恶劣,大部分使用电缆供电,电缆线路经常发生单相漏电或单相接地故障,会引起井下电气火灾、瓦斯煤尘爆炸、电雷管提前引爆以及人身触电等重大事故,因此需要设置可靠地漏电保护装置。本文介绍了我矿对井下开关在漏电保护装置上所做的一些改造成果。 Underground coal mine environmental conditions and production conditions are very poor, most of the use of cable power supply, cable lines often single-phase leakage or single-phase ground fault, can cause underground electrical fires, gas coal dust explosion, electric detonator premature detonation and personal electric shock and other major Accident, therefore need to set reliable leakage protection device. This article describes some of the mine mine underground switch on the leakage protection device made some transformation results.