矿用馈电开关漏电保护动作值的合理整定

在煤矿井下供电系统采用选择性漏电保护时,馈电开关通常会出现漏电动作值变动很多,尤其用作分支开关时大多出现漏电动作值变大或变小,有些开关漏电动作值已变得小于国家标准和行业标准,存在着安全隐患,主要分析导致漏电动作值变小或大的主要原因,以及如何在煤矿井下重新合理整定带选择性漏电保护的真空馈电开关.

Reasonable Setting of the Leakage Protection Actuating Value of Feeder Switches for Mine

When selectivity leakage protection of underground power supply systems are used,the feeder switches have often change leakage actuation values,especially in as branch switches,most of them can change their leakage actuation values.Some values have become smaller than national standard and industry standard,which have safe hidden peril.The paper analyzes the key reasons whcih lead to the leakage actuation values changing and how to reform to select the vacuum feeder switch with leakage protection.