IEC 60287-2-3-2024

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IEC 60287-2-3

Edition 2.0 2024-06

INTERNATIONAL

STANDARD

Electric cables – Calculation of the current rating –

Part 2-3: Thermal resistance – Cables installed in ventilated tunnels

IEC 60287-2-3:2024-06(en)

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IEC 60287-2-3

Edition 2.0 2024-06

INTERNATIONAL

STANDARD

Electric cables – Calculation of the current rating –

Part 2-3: Thermal resistance – Cables installed in ventilated tunnels

INTERNATIONAL

ELECTROTECHNICAL

COMMISSION

ICS 29.060.20

ISBN 978-2-8322-9062-0

® Registered trademark of the International Electrotechnical Commission

Warning! Make sure that you obtained this publication from an authorized distributor.

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摘要：

IEC 60287-2-3-2024 是国际电工委员会最新发布的电缆额定电流计算标准，专门针对外部热源影响下的电力电缆载流量校正系数进行规定。该标准适用于不同敷设条件（如直埋、管道、空气中）及多回路并行场景，详细提供了热电偶效应、邻近热源（如蒸汽管道、其他电缆）及太阳辐射等因素下的校正方法。与旧版相比，2024版更新了环境温度基准、热阻参数及交替负载工况的修正公式，并新增了混合电缆排列的叠加计算模型。本文件是电气工程师、电缆制造商及电力系统设计单位进行安全载流量校核的关键参考，确保电缆长期运行不

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IEC 60287-2-3-2024

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