中文摘要：

对小型断路器操作机构的动作可靠性灵敏度进行探讨。运用机构可靠性设计理论中的Monte Carlo法分析了操作机构在过载分断时的动作可靠性,构建了操作机构在过载分断时的动作可靠性模型;同时,利用Monte Carlo法分析了操作机构的动作可靠性灵敏度,给出了操作机构随机参数可靠性灵敏度的变化规律,研究了随机参数的改变对操作机构动作可靠性的影响。结果表明,该方法能够有效地分析小型断路器操作机构的动作可靠性,同时也可为小型断路器操作机构的可靠性设计提供参考。

英文摘要：

The operating mechanism action reliability of miniature circuit breaker was studied. The action reliability of miniature circuit breaker was investigated and the mechanism action reliability model was built at the overload breaking moment by using Monte Carlo method of mechanism reliabil- ity design theory. Meanwhile, the action reliability sensitivity of mechanism was analyzed, which gave out the variation laws of random parameters reliability sensitivity and the impacts of random parame- ter changes to operating mechanism action reliability. The analytical results indicate that the method used herein can analyze action reliability of miniature circuit breaker operating mechanism effectively and provide a basis for the design of miniature circuit breaker operating mechanism as well.