State Diagnosis for Closing/Opening Spring in the Spring Operating Mechanism of Circuit Breaker

Abstract

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 the analyze 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, and these 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.