电器与能效管理技术Issue(3)：53-59,7.DOI:10.16628/j.cnki.2095-8188.2026.03.007
塑壳断路器窄缝特征对直流临界负载电流的影响研究
Research on the Influence of Narrow-Slot Characteristics of Molded Case Circuit Breakers on DC Critical Load Current
摘要
Abstract
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.关键词
直流塑壳断路器/临界负载电流/窄缝材料/窄缝间距Key words
direct current molded case circuit breaker/critical load current/narrow slit material/narrow-slot spacing分类
信息技术与安全科学引用本文复制引用
虞胜财,陈俊,张森林..塑壳断路器窄缝特征对直流临界负载电流的影响研究[J].电器与能效管理技术,2026,(3):53-59,7.基金项目
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) （23DZ1201100）
