雷电防护 通信线路 第1部分:光纤设施

[中文适用范围]： IEC 61663 的这一部分涉及光纤装置中电信线路的防雷保护。其目的是将指定安装中的光缆中可能发生的主要故障的数量限制在低于或等于极限值的值内，该极限值被定义为可容忍的主要故障频率。因此本标准指出了计算可能出现的一次故障次数、选择可行的保护措施和指示可容忍的一次故障频率的方法。本标准不考虑二次故障。本标准附录 G 中描述的测试仅适用于与光纤装置中的雷电相关的风险评估。电缆设计资格测试不属于本标准的范围。 [外文原描述]： Objective is to limit the number of possible primary failures occurring in the optical fibre cable in a specified installation to within values which are lower than or equal to the limit value, defined as the tolerable frequency of primary failures. Gives the method for calculating the possible number of primary failures, choosing the feasible protective measures and indicating the tolerable frequency of primary failures. Secondary failures are not considered. The tests described in annex G are convenient only for the risk evaluation associated with lightning in fibre optic installations. Tests for the qualification of a cable design are outside the scope of this standard.