IEC 60287-2-3:2024 ED2

Electric cables - Calculation of the current rating - Part 2-3: Thermal resistance - Cables installed in ventilated tunnels IEC 60287-2-3:2024 ED2

Publication date:   Jun 28, 2024

General information

60.60 Standard published   Jun 28, 2024

IEC

TC 20

International Standard

29.060.20   Cables

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Scope

IEC 60287-2-3:2024 describes a method for calculating the continuous current rating factor for cables of all voltages installed in ventilated tunnels. The method is applicable to any type of cable. The method applies to natural as well as forced ventilation. Longitudinal heat transfer within the cables and the surroundings of the tunnel is assumed to be negligible. All cables are assumed to be identical within the tunnel and it is assumed that the tunnel cross-section does not change with distance along the tunnel.

Life cycle

PREVIOUSLY

WITHDRAWN
IEC 60287-2-3:2017 ED1

NOW

PUBLISHED
IEC 60287-2-3:2024 ED2
60.60 Standard published
Jun 28, 2024