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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。
A new type of low voltage feed switch protector device is introduced. According to the two kinds of leakage protection of low voltage feed switch of 6.6 kV power grid in coal mine at present: additional DC power detection type leakage protection and zero sequence power directional leakage protection, the protection principle and Advantages and disadvantages, given the experimental data and field applications, the safe operation of coal mines is of great significance.