摘要
根据现场调查，结合理论计算分析得出，煤矿应用的中性点不接地６ｋＶ电网安全状况极差，单相接地方式不适合某些煤矿电网。
Batsed on the cite investigation and theory calculation,the paper indicates that6kV electric nets with non-earth-connection oeutral point for coal mines exist serious safity prob-lems,and the earth connection pattern of single phase is not suitable to some electric nets in coalmines.
关键词
煤矿
电网
中性点
不接地方式
调查分析
neutral point,earth connection,single phase,excessive voltage
