小型断路器灭弧结构对短路分断能力的影响  

Influence Analysis of MCB Arc Extinguishing Chamber Structure on Breaking Capacity

作　　者：杨宇 司莺歌 尹冬梅 YANG Yu;SI Yingge;YIN Dongmei(Zhejiang Zhengtai Electric Application Co.,Ltd.,Yueqing 325603,China)

机构地区：[1]浙江正泰电器股份有限公司

出　　处：《电器与能效管理技术》2019年第14期82-85,共4页Electrical & Energy Management Technology

摘　　要：短路分断能力是低压断路器的一项重要技术指标。分析了引弧通道、灭弧室结构、排气通道对电弧电压特性、电弧停滞及熄灭的影响。介绍了对灭弧系统结构的改进设计,可加快电弧的引弧速度,缩短电弧的停滞时间、燃弧时间,加大栅片切弧利用率,从而提升电弧电压,提高小型断路器的分断性能。The short breaking capacity is an important technical index of low voltage circuit breaker.This paper analyzed the influence of arc channel,chamber structure,exhaust channel on arc voltage characteristic,arc stagnation and quenching.The structure of arc extinguishing system was improved by design,which speeds up the arc striking,shortens the arc stagnation time and arc time,increases the grate arc-cutting ratio,promotes the arc voltage,and improves the breaking capacity of MCB.

关 键 词：短路分断能力 灭弧结构 熄弧 金属栅片 

分 类 号：TM561[电气工程—电器]