the work principle of the on-line monitoring equipment with inset double bellows, the gas leakage test of circuit breaker and open/close capability, have been carried out.

• 通过内置式双波纹管在线检测装置的工作原理、断路器漏气检测、断路器开断及关合能力3项特性试验,介绍了试验方法、数据和结论。