矿井低压电网漏电故障分析与检测电路设计.

In mine power network, about 70 % of total failures are resulted by the leakage fault, because the non neutral grounding is widely used in our country. This directly influences normal production and economic benefit of mine enterprises. By analyzing the leakage fault of mine low voltage power network and using the principle of additional DC source leakage protection, zero sequence voltage, zero sequence current and phase comparison leakage protection, a practical detection circuit is designed and its working principle is analyzed, Experiment verifies its effects. [ABSTRACT FROM AUTHOR]