小型断路器分断电弧的试验研究及其结构优化  

Experimental Investigation and Structure Optimization of Miniature Circuit Breaker

作　　者：郭瑾[1] 陈冰[1] 纽春萍[2] 牟京卫[1] 

机构地区：[1]西安高压电器研究院有限责任公司,陕西西安710075 [2]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《低压电器》2014年第8期4-8,16,共6页Low Voltage Apparatus

摘　　要：针对某型号小型断路器(MCB)产品的灭弧室,采用电流振荡回路,试验观察了电弧的运动情况。通过观测电弧的运动以及电弧电压特性,结合电弧的烧蚀情况,分析了栅片形状、跑弧道、出气孔等对产品灭弧能力的影响。通过缩短上跑弧道、栅片后加带孔绝缘挡板和改变栅片固定件等方法,缩短了电弧的停滞时间、转移时间、燃弧时间、增大了栅片切割程度,提高了电弧电压,改善了MCB的分断性能。The arc movement of a miniture circuit breaker （MCB） was observed by an oscillating circuit device. The influence of the splitter plate shape, the electrode and the ventilation on the arc extinction capability of MCB was analyzed by observing the arc movement and the arc voltage characteristic. The stagnation time, transfer time and the arcing time were shortened. The level of the arc splitting was increased. The arc voltage was enhanced. Therefore, the interrupting performance of MCB was improved.

关 键 词：小型断路器 电弧 灭弧室 结构优化 

分 类 号：TM561[电气工程—电器]