Supply transformers for underground coal mine well are earthed at neutral point.

很多地方煤矿在供电方面存在不安全的隐患,向井下供电的变压器中性点接地.

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In the exploiting area of underground coal mine, most are facing the underground water discharge.

在地下煤矿开采的地区, 大都伴之有地下水排放.

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The importance of leakage of electricity and earth leakage protection in underground coal mine are presented.

介绍了煤矿井下漏电及漏电保护的重要性.

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