塑壳断路器短路分断能力提升方法研究  

Research on Improving Short Circuit Breaking Capacity of Moulded Case Circuit Breakers

作　　者：周云红[1] ZHOU Yun-hong(School of Electric Power Engineering,Nanjing Institute of Technology,Jiangsu Nanjing 211100,China)

机构地区：[1]南京工程学院电力工程学院,江苏南京211100

出　　处：《机械设计与制造》2024年第4期209-213,共5页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(51877101);南京工程学院创新基金项目(CKJB201802);江苏省配电网智能技术与装备协同创新中心开放基金资助项目(XTCX201616)。

摘　　要：短路分断是断路器的核心功能,提高断路器的短路分断能力是市场的持续需求。针对有效提升塑壳断路器(Moulded Case Circuit Breaker,MCCB)短路分断能力的方法开展了研究。利用栅片电压测量分析法可以检测灭弧栅片在短路分断时切割电弧的情况,评估各灭弧栅片切割电弧的性能以及电弧在灭弧室内的动态特性,为电弧优化提供参考数据。利用有限元仿真的方法进行电磁力计算,有利于快速验证优化设计方案而免去实际的试验验证,节约产品的研发成本,缩短产品的研发周期。蒸汽喷射控制(Vapour Jet Control,VJC)产气材料的运用也能够进一步提高产品的短路分断能力。综合运用以上设计方法,能够在不会大幅增加研发成本的基础上,快速提升MCCB的短路分断能力,工程应用价值较好。Short circuit breaking is the core function of circuit breakers,and improving the short circuit breaking capacity of cir-cuit breakers is the continuous demand of market.The methods to effectively improve the short-circuit breaking capacity of MCCB are studied.The grid voltage measurement and analysis method can be used to detect the arc cutting condition of arc extinguish-ing grids in short circuit breaking,evaluate the arc cutting performance of each arc extinguishing grid and the dynamic character-istics of arc in arc extinguishing chamber,and provide reference data for arc optimization.Using the finite element simulation method to calculate the electromagnetic force is conducive to quickly verify the optimal design scheme without actual test verifica-tion,save the product development cost and shorten the product development cycle.The application of vapor jet control(VJC)gas producing materials can also further improve the short-circuit breaking ability of products.The comprehensive application of the above design methods can quickly improve the short-circuit breaking capacity of MCCB without significantly increasing the re-search and design cost,and has good engineering application value.

关 键 词：塑壳断路器 短路分断能力 栅片电压测量 有限元仿真 电磁力分析 蒸汽喷射控制 

分 类 号：TH16[机械工程—机械制造及自动化] TM561[电气工程—电器]