光纤电缆 第1-124部分：通用规范 - 基本光缆测试程序 - 机械测试方法 - 微导管布线安装测试，方法E24

[中文适用范围]： IEC 60794-1-124:2025 包含用于评估微孔缆线（如微孔光纤缆、光纤单元或混合缆等）在吹入微孔或保护性微孔时行为的测试方法，称为方法 E24。本文件描述了两种吹缆路径布局：方法 A 包括两个导轮和两个中间的长直段（曲率相同）。方法 B 包括三个导轮，中间的导轮使缆线经历左弯和右弯，这是任何实际吹缆路径的特征。此外，本文件还描述了一种可选程序，用于检查已安装缆线的吹出能力。本版取消并替换了 IEC 60794-1-21 第一版（2015 年发布）和其修正案 1:2020 中的方法 E24。本版为技术修订版，相较于前版有以下重大技术变更：a) 增加了一种吹缆路径（见图 2），其中曲率方向发生变化，通过引入第三个导轮实现；b) 增加附录 A（图 A.1 显示该吹缆路径的实用实施方案）；c) 增加附录 B，描述所谓的“撞击测试”；d) 增加附录 C，描述缆线吹出程序。 [外文原描述]： IEC 60794-1-124:2025 contains test procedures, referred to as Method E24, for evaluating the behaviour of microduct cabling (microduct optical cable, fibre unit or hybrid cable etc.) when blown into a microduct or protected microduct. This document describes two blowing track layouts: Method A consists of two mandrels and two long straight sections in between (same curvature). Method B consists of 3 mandrels. The middle mandrel forces the cable to experience both left- and right-hand bending, which is a feature of any realistic blowing route. In addition, this document describes an optional procedure to check the capability of blowing out an installed cable. This first edition cancels and replaces Method E24 of the first edition of IEC 60794‑1‑21 published in 2015 and Amendment 1:2020. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) addition of a blowing route (see Figure 2) which includes a change in the direction of curvature. This was achieved by introducing a third mandrel; b) addition of Annex A (Figure A.1 which shows a practical implementation of the blowing route; c) addition of Annex B which describes the so-called Crash Test; d) addition of Annex C which describes a cable blowing out procedure.