浅谈低压防雷及检测应注意的几个问题  

Aspects on Lightning Protection and Testing in Low Voltage Circuit

作　　者：桑建平[1] 苏淼[1] 刘志强[1] 

机构地区：[1]国家绝缘子避雷器质量监督检验中心,陕西西安710077

出　　处：《电瓷避雷器》2007年第1期39-42,共4页Insulators and Surge Arresters

摘　　要：简要介绍了低压防雷的两个组成部分:外部防雷及内部防雷。指出了低压防雷的主要产品——低压电涌保护器(SPD)在检测时,应注意合理选择防雷标准和雷电波形参数。认为外部防雷应采用10/350μs波形,内部防雷应采用8/20μs波形;注意SPD本体和连接件的性能以及SPD本体的耐受电流和续流熄灭能力,以免发生火灾事故;应合理布线以提高信号采集精度,尽量减小测量系统与被试品连接引线所围成的面积,根据需要在系统各单元输入端安装有选择性的浪涌吸收电路以及采用低通道滤波器滤除瞬变脉冲,防止电源和空间电磁干扰,尽量减小测量时引起的误差。Two components of lightning protection in low circuit： external and internal ones are briefing. It is pointed out that for testing surge protection device（SPD）, the main lightning protecttion device in low voltage circuit, proper parameter for lightning protection and lightning wave-shape shall be selected. For external protection, wave-shape of 10/350 μs shall be used while that of 8/20 μxs for internal protection. The connection behavior of SPD with connecting parts and the withstand current and follow current extinction capacity of SPD shall be considered carefully to prevent fire, proper wiring shall be made for enhancing precision of signal acquisition. The looping area of connecting wiring from measuring system to test object shall be reduced as possible. Selective surge arrester circuit shall be installed at input of all units with low channel filter for filtering transient pulses in order to eliminate source and space electromagnetic noise. Thus the measuring error can be eliminate as much as possible.

关 键 词：低压电涌保护器 低压防雷检测 测量误差 

分 类 号：TM863[电气工程—高电压与绝缘技术]