As the core connecting equipment between the generator and the power system, generator circuit breaker is commonly installed in various power stations. Its main function is to quickly cut off the fault current in case of a fault to ensure system safety. Taking the fault of the operating mechanism during the closing of a generator circuit breaker as an example, this article clarifies the cause of the operating mechanism fault through disassembly inspection, trace analysis, and design data inspection of the faulty part, and proposes relevant preventive measures. The analysis results have important reference significance for the optimization design and operation maintenance of the operating mechanism of the generator circuit breaker.

generator circuit breaker  /  operating mechanism  /  fault  /  preventive measures