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  • IEC 60287-2-3:2017

    Current The latest, up-to-date edition.

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

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English - French

    Published date:  11-04-2017

    Publisher:  International Electrotechnical Committee

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    Table of Contents - (Show below) - (Hide below)

    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

    Abstract - (Show below) - (Hide below)

    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.

    General Product Information - (Show below) - (Hide below)

    Development Note Stability Date: 2021. (04/2017)
    Document Type Standard
    Publisher International Electrotechnical Committee
    Status Current

    Standards Referencing This Book - (Show below) - (Hide below)

    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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