基于试验的MOV长波与短波通流容量的折算关系研究  

Study on the Conversion Relation of the Flow Capacity between Long Wave and Short Wave of MOV Based on Tests

作　　者：黄克俭 柴健[2] 邳莹 HUANG Kejian;CHAI Jian;PI Ying(Hubei Branch of the Meteorological Cadre Training Institute of the China Meteorological Administration,Wuhan 430074,China;The Center of Lightning Protection in Hubei,Wuhan 430074,China)

机构地区：[1]中国气象局气象干部培训学院湖北分院,武汉430074 [2]湖北省防雷中心,武汉430074

出　　处：《电瓷避雷器》2019年第5期21-26,共6页Insulators and Surge Arresters

基　　金：湖北省雷电灾害防御科研专项(编号:FL-Z-201403)

摘　　要：采用冲击电流发生器,对不同厂家、不同压敏电压(U1 mA)的20 kA标称放电电流(In)金属氧化物压敏电阻(MOV)施以长波10/350μs和短波8/20μs冲击电流,以期考察MOV耐受长波与短波冲击电流的折算关系。实验结果表明:MOV在长波和短波下的通流容量折算关系与MOV的压敏电压相关,其折算值与压敏电压成正比例的关系,相比于短波,长波电流耐受能力随压敏电压升高而减弱;通过实验得出,MOV在短波和长波冲击下的通流容量比值为:当压敏电压为430 V时14.44倍,当压敏电压为620 V时16.32倍,当压敏电压为910 V时22.27倍。Longwave 10/350μs and shortwave 8/20μs impulse currents were applied to 20 kA nominal discharge current(In)metal oxide varistors(MOV)of different manufacturers and breakdown voltages(U1 mA)in order to investigate the conversion relationship between longwave and shortwave impulse currents of the tolerance of MOV.The test results show that the conversion relationship of the flux capacity of MOV under longwave and shortwave is related to the breakdown voltage of MOV,and the conversion value is proportional to the breakdown voltage.Compared with shortwave,the tolerance ability of the longwave current decreases withthe breakdown voltage increased.Through test,it is concluded that the flow capacity ratio of MOV under the shocking of short wave and long wave is14.44 times when the breakdown voltage is 430 V,16.32 times when the breakdown voltage is 620 V,and 22.27 times when the breakdown voltage is 910 V.

关 键 词：折算关系 MOV 10/350μs冲击电流 8/20μs冲击电流 能量 压敏电压 

分 类 号：TM8[电气工程—高电压与绝缘技术]