光缆护层对地绝缘电阻检测系统  

Detection system of cable-sheath ground insulation resistance

作　　者：杨理践[1] 刘芳[1] 高松巍[1] 

机构地区：[1]沈阳工业大学信息科学与工程学院,沈阳110870

出　　处：《沈阳工业大学学报》2010年第5期541-545,共5页Journal of Shenyang University of Technology

基　　金：国家自然科学基金仪表专项基金资助项目(60927004)

摘　　要：为了能及时发现地下带金属护层光缆的破损隐患,提出一种通过检测光缆金属护层对地绝缘电阻大小来判断光缆是否破损的方法.该方法在光缆的金属铠装体上施加直流高压,利用采样电阻测量漏电流值,通过计算光缆护层对地绝缘电阻的实际大小判断光缆是否有破损.搭建了实际测量电路并对电路进行了仿真,结果表明,该系统最大可探测对地电阻为25MΩ,最低可探测故障对地电阻为5kΩ,证明了该方法具有一定的可行性和实际应用价值.In order to discover the hidden damage of the buried cable with metal sheath in time,a cable damage judgement method of detecting the cable metal sheath ground insulation resistance was proposed.The method applied DC high voltage on the metal sheath of the cable and detected the leakage current using the sampling resistance.The actual value of the cable metal sheath ground insulation resistance was calculated to judge the cable damage.The practical measuring circuit was built,and the circuit simulation was ...

关 键 词：绝缘电阻 接线盒 前站 兆欧表 开关电源 光缆护层 通信光缆 误差放大器 

分 类 号：TM934.15[电气工程—电力电子与电力传动]