用于数字通信的多芯和对称对/四芯电缆 第 1-4 部分：由于部署远程供电而对成束电缆中的导体发热进行评估

[中文适用范围]： 本文件规定了一种评估用于数字通信的成束电缆热行为的方法。描述了一种确定某些远程供电电流的电缆束温升的方法，作为分析布线系统安装标准中描述的几种测试安排下的预期性能的基础（例如[1]1、[2]） 。它仅旨在为评估参考环境条件和布置中数字通信电缆的热行为提供指导。因此，它无意成为一种测试方法。考虑以下测试安排： c) 自由空气； d) 电缆桥架； e) 导管； f) 端部密封的导管。尽管本文档涵盖四对数据级电缆，但相同的原理也适用于其他电缆类型。 [外文原描述]： IEC 61156-1-4:2018 specifies a method to assess the thermal behaviour of cables arranged in bundles, for digital communications. A method is described to determine the temperature increase in cable bundles for certain remote powering currents as a basis to analyse the expected performance under several test arrangements described in standards dealing with the installation of cabling systems. It is only intended to provide guidance to assess the thermal behaviour of cables for digital communications in reference environmental conditions and arrangements. It is therefore not intended to become a type of test method. This first edition cancels and replaces IEC PAS 61156-1-4, published in 2010. This edition includes the following significant technical changes with respect to the previous edition: a) Several test arrangements are considered; b) The mathematical approach was revised.