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

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Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English - French

Published date

11-04-2017

Publisher

International Electrotechnical Committee

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Description of method
5 Formulae for air properties
6 Temperature profile
Annex A (informative) - Calculation example
Annex B (informative) - Delta-star transformation
Annex C (informative) - Calculation of F[m] coefficient
Bibliography

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.

DevelopmentNote	Stability Date: 2021. (04/2017)
DocumentType	Standard
Pages	49
PublisherName	International Electrotechnical Committee
Status	Current

Standards	Relationship
BS IEC 60287-2-3:2017	Identical
NEN IEC 60287-2-3 : 2017	Identical

IEC 60287-2-1:2015 RLV	Electric cables - Calculation of the current rating - Part 2-1: Thermal resistance - Calculation of thermal resistance
IEC 60287-1-1:2006+AMD1:2014 CSV	Electric cables - Calculation of the current rating - Part 1-1:Current rating equations (100 % load factor) and calculation of losses - General

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IEC 60287-2-3:2017

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

Table of Contents

Abstract

General Product Information

International Equivalents

Standards Referencing This Book

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