采煤机电气系统的漏电保护探讨

Study on leakage protection of shearer electrical system

主要研究EL3无载漏电保护工作原理、EL5无载漏电保护单元工作原理、有载接地故障继电器GFR工作原理、漏电试验等问题。当系统工作时,3 300 V线路由巷道负荷中心的监测系统进行漏电保护。

This paper mainly studies the working principle of no-load leakage protection for EL3,working principle of EL5 no-load leakage protection unit,working principle of GFR for on-load ground fault relay and leakage test. When the system is in operation,the 3 300 V line is protected from leakage by the monitoring system of the roadway load center.