一种矿井IT系统漏电保护电路  

A Leakage Protection Circuit for Mine IT System

作　　者：赵利[1] ZHAO Li(School of Mechanical and Electrical Engineering,Shanxi Datong University,Datong 037003,China)

机构地区：[1]山西大同大学机电工程工程学院

出　　处：《煤矿安全》2019年第10期122-124,128,共4页Safety in Coal Mines

摘　　要：漏电是煤矿井下IT供电系统绝缘水平降低引起的常见故障形式之一,设计了一种直流检测型漏电保护电路,该电路将反映绝缘程度的漏电电流转换为电压值进行绝缘性能检测,并对电网发生各种漏电故障,进行电网对地绝缘阻值的整定,最后给出了本保护电路动作电阻值计算。Leakage is one of the common faults caused by the reduction of insulation level of IT power supply system in coal mine.A DC detecting leakage protection circuit was designed,which converts leakage current reflecting insulation degree into voltage value for insulation performance detection.When various leakage faults occur in the power grid,the calculation of the action resistance of the protective circuit was given in combination with the setting of the insulation resistance of the grid to the ground.

关 键 词：IT系统 漏电电流 电网绝缘电阻 绝缘检测 漏电保护电路 动作电阻 

分 类 号：TD611.5[矿业工程—矿山机电]