光缆. 第4-10部分: 系列规范. 沿着电力线路的OPGW (光学地线)

[中文适用范围]： 本部分IEC 60794-4是一项家族规范，涵盖了用于保护电力线路免受大气放电或短路影响，同时作为通信和控制光信号的高带宽传输介质的OPGW（光纤复合架空地线）的电缆结构、测试方法以及光学、机械、环境和电气性能要求。相应的环境声明可以根据IEC TR 62839-1制定。OPGW是包含用于控制和/或通信目的的光纤的常规地线/屏蔽线的替代品。通常，光纤松散地嵌入保护缓冲管中。为了满足机械和电气要求，采用一层或多层铝、铝合金、铝包钢、镀锌钢或其混合物的铠装螺旋绞合。如果结构包含铝管或铝槽芯，则该横截面被视为导电部分。 [外文原描述]： IEC 60794-4-10:2014 which is a family specification, covers cable construction, test methods and optical, mechanical, environmental and electrical performance requirements for OPGW (optical ground wire) which is used for the protection of electrical power lines against atmospheric discharges or short-circuits and, at the same time, as a high bandwidth transport media for communications-and-control optical signals. The corresponding environmental declaration may be built according to IEC TR 62839-1. This second edition cancels and replaces the first edition published in 2006 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - galloping test (9.7) has been added to the type tests list; - update of definitions clause; - maximum installation tension (MIT) defined and used in the sheave test description; - definition of characterization of OPGW's mechanical behaviour in order to provide information useful for electrical power transmission lines designers; - improved definition of lightning test parameters and conditions to improve reproducibility among different laboratories. Keywords: OPGW (optical ground wire), protection of electrical power lines, atmospheric discharges