雷电防护 通信线路 第2部分：使用金属导体的线路

[中文适用范围]： IEC 61663 的这一部分涉及使用金属导体的室外电信线路（例如接入网络、建筑物之间的线路）的防雷保护。这些线路涉及： - 连接交换机和网络终端（NT1）的电信线路； - 连接位于不同建筑物内的设备的电信或信号线，例如计算机之间的ISDN 线或信号线。注：在本标准中，此类线路称为“电信线路”。本标准的目的是通过将这些线路中可能发生的过电压和过电流造成的损坏风险限制为低于或等于可承受的损坏风险。详细信息请参见附件 A。 建筑物类型也会影响电信线路雷击损坏的风险评估以及设备安装的物理布局。然而，这些和其他类似的方面均由适当的特定标准涵盖，超出了本标准的范围。必须按照本标准的要求以及 IEC 61663-1 中定义的要求来保护缆芯中带有金属对的光缆。 [外文原描述]： Deals with protection against lightning of outdoor telecommunication lines using metallic conductors (for example, access networks, lines between buildings). These lines concern: - telecommunication lines connecting a switch with a network termination (NT1) - telecommunication or signal lines connecting equipment located in different buildings, e.g. ISDN lines or signal lines between computers. The object of this standard is to protect telecommunication lines and connected equipment against the direct and indirect influence of lightning by limiting the risk of damage due to overvoltages and overcurrents, liable to occur in these lines, to values which are lower than or equal to tolerable risk of damage. The type of building can also have an effect on the risk assessment of lightning damage to telecommunication lines, as well as the physical layout of the equipment installation. However, these and other similar aspects are covered by appropriate, specific standards and are beyond the scope of this standard. Fibre optical cable with metallic pairs in the cable core must be protected, following the requirements of this standard, together with those requirements defined in IEC 61663-1.