Problems in the Application of Low Voltage Circuit Breakers for Gassing Material

Jungang Zhou, Xiaolong Yu, Liying Liu, Wenlin Quan, Le Zhu


Polyoxymethylene (POM) and nylon 66 (PA 66) represent polymer gassing materials as arc extinguishing chamber side plate or shell were widely used in low voltage circuit breaker. During the short-circuit breaking test of the low voltage circuit breaker, the problems such as pressure, temperature, poisonous and harmful gas, etc. were found for gassing material application. In the application of low voltage circuit breaker, the existence of these problems has an effect on the performance of the low voltage circuit breaker and has the potential safety hazard. In this paper, these above problems were analyzed, the models were established, and the suggestions were put forward. That can optimize the application of gassing material in low voltage circuit breaker, and improve the performance of low voltage circuit breaker.


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