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我矿机动车间动力系统继电保护装置于1974年8月份试制成功。经多次试验与故障考验,证明其运行可靠,接地选择正确。我矿动力系统属于中性点不接地的小电流接地系统。在发生单相接地时,系统仍然可以运行,并允许在故障情况下寻找接地线路进行处理。过去变电工发现接地时,是采用人工手动拉闸,切除各线路负荷来确定其接地的。这样,既影响生产,又不安全。在这种情况下,我们认为设置接地保护装置是非常必要的。在动力系统中,接地电流的大小,取决于各
I mine power plant dynamic system relay protection device trial success in August 1974. After many tests and failures, to prove its reliable operation, select the correct grounding. Mine mine power system is neutral ungrounded small current grounding system. In the event of a single-phase ground, the system is still operational and allows the search for a ground fault in the event of a failure. In the past, when a substation found a grounded ground, it was manually manually pulled to remove the load of each line to determine its grounding. This will not only affect production but also be unsafe. In this case, we think it is necessary to set the grounding protection device. In power systems, the size of the ground current depends on each