8/20脉冲对ZnO压敏电阻器工频耐受性能的影响  

Effect of Repeated Pulses of 8/20 Waveform on Power FrequencyVoltage Withstand Capacity of ZnO Varistors

作　　者：韩伟[1] 王建文[1] 孟梅[1] 何欣[1] 

机构地区：[1]西安市西无二电子信息集团有限公司,陕西西安710015

出　　处：《电瓷避雷器》2006年第4期41-43,共3页Insulators and Surge Arresters

摘　　要：通过试验,分析了8/20脉冲次数及电流峰值对ZnO压敏电阻工频耐受性能的影响。在脉冲次数及电流峰值不同的情况下,电阻体内部发生结构性变化,导致其工频耐受性能发生变化。当脉冲电流峰值未超过某一临界值时,工频耐受时间随着冲击次数的增加而延长,超过此临界值时,工频耐受时间随着冲击次数的增加而缩短;在8/20脉冲次数一定的条件下,工频耐受时间也随电流峰值的递增呈现先延长后缩短的趋势。Through experimental, the effect of 8/20 pulse number and current amplitude on power frequency voltage withstand capacity of ZnO varistors is analyzed. With different pulse number and current amplitude, the texture change take place in varistor, leading to variation of its power frequency voltage withstand capacity. At current amplitude below a certain critical value the power frequency voltage withstand duration increases as the pulse number raises, meanwhile beyond the critical value it will be decreased as the pulse number raises. At a given pulse number, the power frequency voltage withstand duration tend to increase at first and then decrease as the current amplitude raise.

关 键 词：氧化锌压敏电阻器 脉冲次数 电流峰值 工频耐受 

分 类 号：TM54[电气工程—电器]