煤矿低压馈电开关的漏电与改造探析

Analysis on the Reform of Low Voltage Feed Switch in Coal Mine

为提高矿用低压馈电开关反应的灵敏性和动作的及时性,基于某矿低压馈电开关应用现状,介绍了低压馈电开关总开关漏电保护原理与分开关漏电保护原理,分析了低压馈电开关分开关不动作与总开关延时过长的原因,并针对这些原因提出了一系列具体改造措施。改造后的低压馈电开关反应更灵敏,动作更及时。

In order to improve the sensitivity of mine low-voltage feed switch response,based on the application status of mine low-voltage feed switch,the principle of low-voltage feed switch main switch leakage protection and the principle of separate switch leakage protection are introduced.This paper analyzes the reasons why the low-voltage feed switch is not active and the delay of the main switch is too long,and puts forward a series of concrete modification measures for these reasons.The modified feed switch is more active than before.