IEC 60287-2-1:20 23 CMV包含官方标准及其注释版本。注释版本为您提供了一种快速简单的方法来比较IEC 60287-2-1:20 23版3.0和之前的IEC 60287-2-1:20 15版2.0之间的所有更改。此外，还提供了IEC TC 20专家的意见，以解释最相关变更的原因，或澄清内容的任何部分。 IEC 60287-2-1:20 23仅适用于电缆在所有交流电压和高达5 kV的直流电压下的稳态运行条件，直接埋在地下、管道、槽或钢管中，无论土壤是否部分干燥，以及空气中的电缆。术语“稳态”旨在表示仅足以渐近地产生最大导体温度的连续恒定电流(100%负载因子)，假设周围环境条件恒定。

IEC 60287-2-1:2023 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 60287-2-1:2023 edition 3.0 and the previous IEC 60287-2-1:2015 edition 2.0. Furthermore, comments from IEC TC 20 experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the content.

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.