电器与能效管理技术Issue(4)：60-65,6.DOI:10.16628/j.cnki.2095-8188.2025.04.000
基于窄缝和大开距技术对断路器临界电流试验的分析
Analysis on Critical Current Test of Circuit Breaker Based on Narrow Gap and Large Contact Gap Technology
余银波 1邹海荣 1蒋顾平2
作者信息
- 1. 上海电机学院电气学院,上海 201306
- 2. 上海良信电器有限公司,上海 200137
- 折叠
摘要
Abstract
Whether the critical current can be reliably broken is an important performance index of low voltage circuit breakers.The 2P DC 2000 V air circuit breaker can't pass the experiment because the arc burning time is more than 1 s under the critical current of 64 A.Experimental analysis is carried out on various factors influencing the critical current test.The results show that the gas-generating material PA has the best gas-generating effect and a good deionization effect.Increasing the contact gap between the moving and stationary contacts from 45 mm to 60 mm can elongate the arc,effectively breaking low current DC arcs and increasing arc voltage.When the width of the narrow gap is changed to 10 mm,the product can pass the critical current test.Subsequent the refinements based on these findings ensure compliance with other performance requirements.关键词
断路器/临界电流/燃弧时间/大开距/窄缝产气Key words
circuit breaker/critical current/arc ignition time/large contact gap/narrow gap gas generation分类
信息技术与安全科学引用本文复制引用
余银波,邹海荣,蒋顾平..基于窄缝和大开距技术对断路器临界电流试验的分析[J].电器与能效管理技术,2025,(4):60-65,6.
