IEC 60287-2-3:2017 ED1

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

Publication date: 11 pri 2017

General information

Current stage: 99.60 Effective date: 28 qer 2024

Originator: IEC

Owner: TC 20

Type: International Standard

ICS: 29.060.20

Gjuha: anglisht frëngjisht

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Statusi: Revised

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Scope

IEC 60287-2-3:2017 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

NOW

WITHDRAWN
IEC 60287-2-3:2017 ED1
99.60 Withdrawal effective
28 qer 2024

REVISED BY

PUBLISHED
IEC 60287-2-3:2024 ED2