1000kV特高压避雷器异常分析及解体报告

Analytic Report of 1000k V Extra-High Voltage Lightning Arrester

避雷器可有效保护站内主设备在雷电和操作过电压下的安全,避雷器自身性能主要通过停电和带电检测进行监测,在特高压设备的停电检测中发现带电检侧正常的避雷器存在泄露电流超标的缺陷,通过返厂解体检查,逐级试验验证,最终确定避雷器泄露电流异常升高的原因,并会同供应商制订整改措施,消除缺陷。

Lightning arrester can effectively guarantee the safety of the main equipment at lightning and switching overvoltage. The functions of lightning arrester are monitored mainly through power cut and live detection. The arrester which was normal in live detection was found to have the defect of overproof leakage current,which was then returned to have a disassembly test. The step tests finally confirmed the reasons for the abnormally increased leakage current and then rectification measures were made with the supplier to eliminate the defects.