IEC 60287-2-3 Ed. 2.0 En:2024

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

International Electrotechnical Commission , 06/01/2024

Publisher: IEC

File Format: PDF

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Description

Standard By:International Electrotechnical Commission , 06/01/2024

Published:06/01/2024

Pages:30

ISBN(s):9782832290620

File Size:1 file , 870 KB

Language:English

Note:This product is restricted and cannot be purchased in the following countries Ukraine, Russia, Belarus

This part of IEC 60287 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.