一起220kV断路器断口绝缘击穿故障分析

Analysis of Fracture Insulation Breakdown of A 220kV Circuit Breaker

介绍了一起220kV断路器重燃导致内部损坏的故障。通过对其外观及解体检查,得出造成本次断路器损坏的原因为雷击。为保证断路器稳定运行,提出应加强对一次设备的检测、提高设备耐雷水平、在出线间隔入口处装设金属氧化物避雷器、安装线路避雷器等措施。

A re-burning fault of one 220kV circuit breaker is discussed.By inspecting the appearance and disassembly,it is known that the fault is caused by lightning.To assurance stable operation of circuit breakers,methods of enhancing the detection of primary equipment,improving thunder-resisting level of equipment,installing metal oxide arrester in the entrance of outlet and line arresters are put forward.