塑壳断路器窄缝特征对直流临界负载电流的影响研究OA
Research on the Influence of Narrow-Slot Characteristics of Molded Case Circuit Breakers on DC Critical Load Current
针对直流塑壳断路器中窄缝结构对临界电流分断能力的影响机制展开研究.采用控制变量法,分别设计窄缝材质与间距的对比试验,依据GB/T 14048.2-2020《低压开关设备和控制设备第2部分:断路器》搭建了试验平台,通过阶梯式加载试验确定样机的临界负载电流.对试验现象与数据进行定性分析与机理探讨,从宏观能量演化与微观带电质点"产生-消失"动态平衡的双重视角,实现试验结果与熄弧理论的多维度印证与互释.明确了窄缝材质与间距参数对临界电流的独立影响规律,为直流临界负载电流分断困难原因及其改善方向提供思路,为直流塑壳断路器灭弧系统的精细化设计提供了理论支撑.
The influence mechanism of narrow-slot structures on the critical current breaking capability in DC molded case circuit breakers is investigated.Using the control variable method,comparative experiments are designed for narrow-slot materials and spacing.An experimental platform is established in accordance with GB/T 14048.2-2020,and the critical load current of the prototype is determined through stepwise loading tests.Qualitative analysis and mechanism exploration are conducted based on experimental phenomena and data.From the dual perspectives of macroscopic energy evolution and the dynamic balance of"generation-extinction"of charged particles at the micro level,the experimental results are corroborated and mutually interpreted with arc extinction theory in multiple dimensions.The independent influence laws of narrow-slot material and spacing parameters on the critical current are clarified,providing insights into the reasons for difficulties in interrupting DC critical load currents and directions for improvement,as well as theoretical support for the refined design of arc-extinguishing systems in DC molded case circuit breakers.
虞胜财;陈俊;张森林
浙江巨邦电器股份有限公司,浙江温州 325000浙江巨邦电器股份有限公司,浙江温州 325000上海电器科学研究所(集团)有限公司,上海 200063
信息技术与安全科学
直流塑壳断路器临界负载电流窄缝材料窄缝间距
direct current molded case circuit breakercritical load currentnarrow slit materialnarrow-slot spacing
《电器与能效管理技术》 2026 (3)
53-59,7
上海市2023年度"科技创新行动计划"科技支撑碳达峰碳中和项目(23DZ1201100)
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