1. Key Laboratory of Fiber Optic Sensing Technology and Information Processing Ministry of Education Wuhan University of Technology Wuhan 430070 China; 2. Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology State Grid Hunan Power Supply Service Center (Metrology Center) Changsha 410004 China ; 3. China Electric Power Research Institute Beijing 100085 China
Abstract：In order to solve the problems that the present inhabitant miniature circuit breaker failure frequently occur and the arc extinguishing ability is short, the miniature circuit breaker arc extinguishing failure analysis and performance optimization research are carried out in this paper. On the basis of analyzing the arc extinguishing failure mechanism of miniature circuit breaker, the optimization design technology roadmap is proposed, the failure simulation model of miniature circuit breaker is built, the relationship between arcing time and the number of chutes is analyzed, the values of key optimization parameters are analyzed and given, the four design schemes are simulated and ,the best optimization design are obtained. Through the test and analysis of the miniature circuit breaker samples before and after optimization, it can be seen that after the optimization of the sample, the breaking time and arcing time are significantly reduced, and the Joule integral is significantly reduced, the test results are consistent with the simulation results. Simulation and test results show that the optimization designs can obviously improve the arc extinguishing performance and breaking capacity of miniature circuit breaker, reduce the arcing time and breaking time, effectively improve the reliability, security and stability of miniature circuit breakers and effectively solves the problem of miniature circuit breaker arc extinguishing failure.
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2019, Vol. 34 
