矿用组合开关保护系统研究
王芳
（大同煤矿集团机电装备天晟电气有限公司，山西 大同 037010）
摘要： 简要介绍了本安先导电路的判定及继电器隔离方式的本安先导电路原理，运用3 种方法分析了矿井低压电网
漏电故障，最后在此基础上，从组合开关对电压保护、短路保护和过载保护三个方面，详细探讨了基于组合开关的矿井
低压电网保护，相信可以通过多方面的综合分析研究出更可靠、保护更加全面和智能的组合开关，从而为中国井下煤矿
的安全机械化开采提供更有保障的服务。
关键词： 组合开关；漏电保护；本质安全电路；保护系统
中图分类号： TD611⁺.5      文献标识码： A     文章编号： 2095-0802-(2020)04-0085-02
Research on Mine Combination Switch Protection System
WANG Fang
(Mechanical and Electrical Equipment Tiansheng Electric Co., Ltd., Datong Coal Mine Group, Datong 037010, Shanxi, China)
Abstract: This paper briefly introduced the determination of intrinsic safety pilot circuit and the principle of intrinsic safety pilot
circuit of relay isolation mode, analyzed the leakage fault of mine low-voltage power grid with three methods, and finally discussed
the mine low-voltage power grid protection based on combination switch from three aspects of voltage protection, short-circuit
protection and overload protection. It is believed that a more reliable, more comprehensive and intelligent combination switch can
be developed through comprehensive analysis in many aspects, so as to provide more guaranteed services for the safe mechanized
mining of Chinese underground coal mines.

Key words: combination switch; earth leakage protection; intrinsically-safe circuit; protection system