接触器操作过电压研究  

Research on Switching Overvoltage for Contactor

作　　者：刘明东[1] 许年生[1] 马跃乾[1] 

机构地区：[1]上海电器科学研究所(集团)有限公司,上海200063

出　　处：《低压电器》2010年第3期8-11,共4页Low Voltage Apparatus

基　　金：上海市科学技术委员会标准专项资助(D9DZ0504000)

摘　　要：分断操作时,接触器线圈两端将产生严重的过电压。采用机械开关触点式继电器控制,操作过电压幅值在1.2～4.2kV之间,持续时间不超过3ms。系统中实际的操作过电压并不仅是衰减的振荡电压波,而且富有高频增幅振荡波、方波和衰减振荡波等成分,这些特性与回路参数尤其是控制开关的性能有关。When a contactor breaks,a serious overvoltage would occur between the two ends of contact coils.Under controlling by mechanical switch contact relay,the amplitude of switching overvoltage was between 1.2～ 4.2 kV for less than 3 ms.An overvoltage which occurred in actual operation of the system was not only a damped oscillatory wave,but compound of high-frequency oscillatory wave with amplitude growth,square wave and damped oscillatory wave.These characteristics were relevant to the circuit parameters,especially the performance of the control switching.

关 键 词：接触器 操作过电压 多次重燃过电压 燃弧过电压 特性分析 

分 类 号：TM572[电气工程—电器]