Electric cables - Calculation of the current rating - Part 2-1: Thermal resistance - Calculation of thermal resistance
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IEC 60287-2-1:2023 CMV
Electric cables - Calculation of the current rating - Part 2-1: Thermal resistance - Calculation of thermal resistance
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IEC 60287-2-1:2023 CMV innehåller både den officiella standarden och dess kommenterade version. Den kommenterade versionen ger dig ett snabbt och enkelt sätt att jämföra alla ändringar mellan IEC 60287-2-1:2023 edition 3.0 och den tidigare IEC 60287-2-1:2015 edition 2.0. Dessutom tillhandahålls kommentarer från IEC TC 20-experter för att förklara orsakerna till de mest relevanta ändringarna eller för att förtydliga någon del av innehållet.
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.
Electric cables - Calculation of the current rating - Part 2-1: Thermal resistance - Calculation of thermal resistance
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