标准摘要
[中文适用范围]： : 本标准适用于电缆的热阻计算，包括电缆各组成部分的热阻计算，如导体与护套之间的热阻、护套与铠装之间的热阻以及外层覆盖物的热阻。此外，标准还涵盖了不同敷设条件下电缆的外部热阻计算，如自由空气中、单根埋地电缆、成组埋地电缆、埋地槽道中的电缆、管道或导管中的电缆等。 [外文原描述]： IEC 60287-2-1:2023 is solely applicable to the conditions of steady-state operation of cables at all alternating voltages, and direct voltages up to 5 kV, buried directly in the ground, in ducts, in troughs or in steel pipes, both with and without partial drying-out of the soil, as well as cables in air. The term "steady state" is intended to mean a continuous constant current (100 % load factor) just sufficient to produce asymptotically the maximum conductor temperature, the surrounding ambient conditions being assumed constant.
英文名称Electric cables - Calculation of the current rating - Part 2-1: Thermal resistance - Calculation of thermal resistance