摘要
由雷电流通过导线时的交变特性,分析电涌保护器(SPD)连接导线的长度和横截面积与导线感应电压大小的关系,比较单芯导线与多芯导线(或分离导线)减小导线电阻、进而减小残压的效果。在SPD的不同接入方式中,分析其连接导线的残压对被保护设备的影响,给出了在受到现场条件限制而无法满足规范提出的连接导线长度控制要求的情况下,选用SPD接入方式的建议。
According to the alternating characteristic of lightning current through wires,this paper analysed the relationship between the length and the cross-sectional area of the wire connecting SPD and the induction voltage of it. Moreover,it compared the effect of what the single-core conductor and multiple-core conductor( or separate wires) reduce the wire resistance and then the residual voltage. In addition,it analysed the influence of the wire's residual voltage of the protected equipment in different access modes of SPD. Finally,it gived suggestion about how to select the access mode of SPD in reference of the given field condition can't meet the requirements of the specifications of the length of connecting wire.
出处
《低压电器》
2013年第24期5-8,共4页
Low Voltage Apparatus
基金
教育部高等学校高职高专计算机类专业教学指导委员会计算机网络技术专业核心课程项目(JZW5901WL004)
关键词
电源线路
电涌保护器
连接导线
残压
power line
surge protective device(SPD)
connecting wire
residual voltage
