小议煤矿井下低压系统漏电保护的方法

摘要

With the use of neutral point grounding system with extinction coil in the coal mine underground power supply system, part of technology of underground low-voltage leakage protection has been affected. This paper introduces two kinds of technology that Little effect by inductive coil. The two kinds of technology are Adding DC leakage protection and quintuple harmonics selective leakage protection. It can be applied to the neutral point grounding system with extinction coil.%随着中性点经消弧线圈接地系统在煤矿井下低压系统中的应用，部分井下低压漏电保护技术受到了较大影响，本文重点介绍了两种受消弧线圈影响较小、可应用于在中性点经消弧线圈接地的煤矿井下低压系统中井下低压漏电保护技术：附加直流漏电保护以及五次谐波选择性漏电保护。