本文对龙首矿井下供电系统近十年来的实际运行情况进行了总结。
This paper summed up the actual operation situation of the underground power supply system of Dragon Head Mine in recent ten years.
分析井下供电系统单相接地的危害，介绍几种常见的漏电保护方法。
This Paper analyses the harm of single-phase earthing in electricity supply system of mine and introduces several type of common ways of leakage protection.
通过分析、究，找出了其运行规律，在此基础上建立了安全可靠的井下供电系统。
Through analysis and investigation, the author found out the operational rule of power supply system and based on the rule, a safe and reliable underground power supply system was set up.
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