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IEC 60287-2-3 ED2

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

General information

50.20 Proof sent to secretariat or FDIS ballot initiated: 8 weeks   Mar 22, 2024

PRVD    May 3, 2024

IEC

TC 20

International Standard

29.060.20   Cables

Scope

IEC 60287-2-3 ED2: 2024 (EN) 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

PUBLISHED
IEC 60287-2-3:2017 ED1

NOW

IN_DEVELOPMENT
IEC 60287-2-3 ED2
50.20 Proof sent to secretariat or FDIS ballot initiated: 8 weeks
Mar 22, 2024