Analysis and Treatment of a Fault-free Tripping Accident of a 500 kV Circuit Breaker
A fault-free tripping event of a 500 kV circuit breaker occurred in a 500 kV substation.Combining action phe-nomena,the reasons from the perspective of insulation and plug-in based on action phenomena is analyzed.After determi-ning the fault of the circuit breaker protection plug-in,further experimental analysis is conducted on the plugin to deter-mine the cause of malfunction.Effective measures are also proposed to avoid the occurrence of tripping events