基于PLC的煤矿低压馈电开关漏电保护的研究

Based on PLC Research on Leakage of Electricity of Colliery Low-voltage Switch

介绍一种新型低压馈电开关保护器装置,针对目前煤矿井下6.6 kV电网低压馈电开关的2种漏电保护:附加直流电源检测式漏电保护、零序功率方向式漏电保护,分析其保护原理及优缺点,给出了实验数据及现场应用情况,对煤矿井下安全作业具有重要意义。

Introducing a kind of new low voltage supply and distribution protector device,analyzing a protection principle of the two main leakage protection ways of 6.6 kV：the attachment direct-current power supply examination tupe leakage protection and the zero forword power direction type leakage protection which are used in present coal mine low voltage feed switch,then summarized their merits and shortcomings,provide the experimental data and field application,for coal mine safety operation is of important significance.