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IEC 60287-2-3 (2017-04)

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IEC 60287-2-3 (2017-04)

IEC 60287-2-3:2017 Electric cables - Calculation of the current rating - Part 2-3: Thermal resistance - Cables installed in ventilated tunnels

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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.

Author	IEC
Editor	CEI
Document type	Standard
Format	File
Edition	1.0
ICS	29.060.20 : Cables
Number of pages	49
Year	2017
Country	Switzerland
Keyword	IEC60287;IEC 60287-2-3:2017