煤矿井下低压旁-直-零式综合漏电保护系统的分析

Analysis of Shunt-Straight-Zero Circuit Comprehensive Leakage Protection System of Low Voltage at Underground Mine

煤矿井下中性点不接地的低压供电单元,漏电保护有多种方式,均各有优缺点。但目前只靠一种保护方式已无法实现对整个供电单元完善的漏电保护。介绍一种旁-直-零式综合漏电保护系统,可把几种漏电保护方式有机地结合起来,并能使供电系统获得较好的保护效果。

For underground mine non-grounding neutral low voltage power supply unit, the leakage protection have a variety of ways, each has the advantage and disadvantage. But now it can not only rely on one form of protection method, because it can not constitute one whole leakage protection system. Introduces one shunt-straight- Zero comprehensive leakage protection system, this system can combine several leakage protection methods together and gains good effect.