断路器弹簧操动机构分/合闸弹簧的状态诊断

State diagnosis for closing/opening spring in the spring operating mechanism of circuit breaker

为保证断路器弹簧操动机构的安全可靠运行,本文提出一种针对弹簧操动机构分/合闸弹簧的状态诊断方法。通过分析弹簧在断路器储能过程和分/合闸动作过程中的动作特性,提取储能过程中电机有效输出功和分/合闸过程中的动作速度作为诊断弹簧性能的特征参数,分析阐述基于对特征参数判断的分/合闸弹簧状态诊断流程,设计分/合闸弹簧状态诊断系统,并结合CT20弹簧操动机构对该方法进行验证。通过对新旧分/合闸弹簧进行对比实验,证明所提出的分/合闸弹簧状态诊断方法简单、准确,具有良好的诊断效果。

In order to ensure safe and reliable operation of the spring operating mechanism,a method of spring’s state diagnosis in spring operating mechanism is proposed.Through analyzing the spring’s operation characteristic in storing process and in closing/opening process,the effective output of motor in storing process and the closing/opening speed are extracted,which are used as characteristic parameters to diagnose spring’s state.The diagnosis process of closing/opening spring’s state is specifically analyzed and described based on the judgment of characteristic parameters.The diagnosis system of closing/opening spring’s state is designed,and it is verified by combining with the CT20 spring operating mechanism.Through the contrast experiment of old and new closing/opening spring,the proposed diagnosis method for opening/closing spring is validated to be simple and accurate,and the result of the diagnosis is very well.