光纤光缆.第3-20部分:室外光缆.自立式架空通信光缆的系列规范

[中文适用范围]： IEC 60794 的这一部分是一个系列规范，涵盖光学自承式架空通信电缆。 IEC 60794-3 埋地电缆和架空电缆分规范的要求适用于本标准涵盖的电缆。在本文中，自支撑架空通信电缆是指具有足够强度构件的电缆结构，设计用于悬挂在杆和类似装置上，而无需其他支撑线或导体的帮助。本标准不涵盖用于高压应用的 ADSS 电缆和其他结构。详细规格可以根据该系列规格来制定。如果电缆打算用于受 ISO/IEC 24702 MICE 表管辖的安装，则第 A.2 条包含取代正常要求的要求。本标准中指定的参数可能会受到测量误差引起的测量不确定度的影响或由于缺乏合适的标准而导致的校准错误。验收标准应根据这一考虑因素进行解释（参见 IEC 60794-3@第 8 条）。测试的光纤数量应代表光缆设计，并应由客户和供应商商定。 [外文原描述]： IEC 60794-3-20:2009 covers optical self-supporting aerial telecommunication cables. Requirements of the sectional specification IEC 60794-3 for duct, buried and aerial cables are applicable to cables covered by this standard. Self-supporting aerial telecommunication cable in this context means a cable construction with sufficient strength members designed to be suspended on poles and similar devices without the aid of another supporting wire or conductor. ADSS cables and other constructions intended for high-voltage applications are not covered by this standard. Detail specifications may be prepared based on this family specification. Clause A.2 contains requirements that supersede the normal requirements in case the cables are intended to be used in installation governed by the MICE table of ISO/IEC 24702. The parameters specified in this standard may be affected by measurement uncertainty arising either from measurement errors or calibration errors due to lack of suitable standards. Acceptance criteria shall be interpreted with respect to this consideration (see IEC 60794-3, Clause 8). The number of fibres tested shall be representative of the cable design and shall be agreed between the customer and the supplier. This second edition cancels and replaces the first edition published in 2002. It constitutes a technical revision. The main changes are listed as: - the fibres specification clause (Clause 5) has been enlarged to include fibre Types B5 and B6.a; - an annex has been added for additional requirements according to the MICE table. Keywords: optical self-supporting aerial telecommunication cables