BS IEC 60287-3-1:2017适用于以下条件下的电缆稳态运行条件: 直接埋在地下、管道、槽或钢管中的所有电压，包括和 没有部分干燥的土壤，以及空气中的电缆。术语“稳态”是 意指持续恒定电流（100%负载系数），刚好足以产生 渐近最大导体温度，周围环境条件为 假设为常数。本文件定义了现场参考条件，但通用值被取代 根据具体的国家要求。交叉引用:IEC 60287-3-1:2017IEC 60287-3-1:1999IEC 60287-2-3:2017购买本文件时可获得的所有现行修订均包含在购买本文件中。

BS IEC 60287-3-1:2017 is applicable to the conditions of steady-state operation of cables at all voltages, buried directly in the ground, in ducts, 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conditions being assumed constant.This document defines site reference conditions, however the general values are superseded by specific national requirements.Cross References:IEC 60287-3-1:2017IEC 60287-3-1:1999IEC 60287-2-3:2017All current amendments available at time of purchase are included with the purchase of this document.