论文部分内容阅读
煤矿井下出现的低压电网的漏电常常会导致矿井出现由瓦斯或者是走电引起的火灾或者是爆炸。在极为狭窄的矿井里面,这样的异常情况必然会导致严重的人员伤亡。近年来,我国的煤矿灾害有一部分就是由于矿井的电路装置出现问题导致的。文章就矿井低压电网漏电的分散性漏电与集中性漏电两种情况进行分析,重点阐述选择性漏电保护在不同中性点接地方式上的应用和中性点不接地系统下单相非金属性接地动作参数的选择。
Electricity leakage from a low-voltage power grid that appears in a coal mine often leads to a mine fire or explosion caused by gas or electric shock. In very narrow mines, such an abnormal situation will inevitably lead to serious human casualties. In recent years, part of the coal mine disaster in our country is caused by the problems of mine circuit devices. The paper analyzes two kinds of cases of leakage current and concentrated leakage current of low voltage power grid leakage, emphasizes the application of selective leakage protection in different neutral grounding modes and single phase nonmetallic grounding in neutral ungrounded system Selection of action parameters.