定义 define 线路型避雷器主要用于交流输变电线路，是为了限制线路雷电过电压，提高线路耐雷水平，是降低系统因雷击故障引起的跳闸率专门设计的一种悬挂安装于输电杆塔上的避雷器。现在交流输电线路主要采用用复合外套金属氧化物避雷器。 Type line lightning arrester is mainly used for ac transmission lines, is to limit line lightning overvoltage, improve lightning resisting level of line, is to reduce system caused by lightning strike fault tripping rate specially designed a kind of suspension installed on transmission tower lightning arrester. Ac power lines are now mainly used with composite overcoat metal oxide arrester. 复合外套金属氧化物避雷器为并联连接在线路绝缘子的两端，用于限制线路上的雷电过电压及（或）操作过电压之用的复合外套金属氧化物避雷器（以下简称线路避雷器）。金属氧化物避雷器（压敏避雷器）是以氧化锌（ZnO）基压敏电阻（非线性电阻）组成的。 Composite coat of metal oxide surge arrester for parallel connection at both ends of the line insulator, used to limit the line on the lightning overvoltage and (or) operating overvoltage composite coat of metal oxide surge arrester (hereinafter referred to as the line arrester). Metal oxide arrester (pressure sensitive arrester) is composed of zinc oxide (ZnO) base pressure sensitive resistance (non-linear resistance).