Abstract
Molded case circuit breakers play a control and protection role in the power distribution system. The breaking capacity of circuit breakers is depend on the extinguishing speed of the arc. And the framework of the arc chamber directly affects the arc quenching capability. Usually, the design of the arc chamber focuses on the enhancement of the air blowing. On the one hand, the arc will enter the splitter plate region quickly to raise the arc voltage and cool the arc; On the other hand, the energy dissipation of the arc will be enhanced and the arc will be cooled rapidly, so as to achieve the effect of quickly extinguishing the arc. A 3-D airflow field simulation model for the arc chamber structure of molded case circuit breaker products is established in this paper firstly. And the airflow field distribution is analyzed. On this basis, the framework of the arc chamber is optimized aimed at enhancing air blowing. The airflow field of the optimized structure is analyzed by simulation. By comparing the results before and after optimization, it is concluded that the optimized structure can enhance the airflow velocity, which verifies the effectiveness of the optimized structure. At the same time, this work provides a certain reference for the manipulation of the arc chamber of the molded case circuit breaker.
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Acknowledgment
The research was supported by the National Natural Science Foundation of China (52107167), the China Postdoctoral Science Foundation (2021M692877), the Shaanxi Natural Science Foundation (2021JQ-473) and the Shaanxi Provincial Department of Education's scientific research project (21JK0788).
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Yin, J., Wang, D., Lang, X., Yuan, H. (2023). Three Dimensional Simulation and Optimization of Airflow Field in Arc Extinguishing Chamber of Molded Case Circuit Breaker. In: Yang, Q., Li, J., **e, K., Hu, J. (eds) The Proceedings of the 17th Annual Conference of China Electrotechnical Society. ACCES 2022. Lecture Notes in Electrical Engineering, vol 1012. Springer, Singapore. https://doi.org/10.1007/978-981-99-0357-3_123
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DOI: https://doi.org/10.1007/978-981-99-0357-3_123
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