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  • IEC 60287-2-1:2015 RLV

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    Electric cables - Calculation of the current rating - Part 2-1: Thermal resistance - Calculation of thermal resistance

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English

    Published date:  09-04-2015

    Publisher:  International Electrotechnical Committee

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

    FOREWORD
    INTRODUCTION
    1 Scope
    2 Normative references
    3 Symbols
    4 Calculation of thermal resistances
    5 Digital calculation of quantities given graphically
    Bibliography

    Abstract - (Show below) - (Hide below)

    IEC 60287-2-1:2015 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.
    IEC 60287-2-1:2015 is solely applicable to the conditions of steady-state operation of cables at all alternating voltages, and direct voltages up to 5 kV, buried directly in the ground, in ducts, in troughs or in steel pipes, both with and without partial drying-out of the soil, as well as cables in air. The term "steady state" is intended to mean a continuous constant current (100 % load factor) just sufficient to produce asymptotically the maximum conductor temperature, the surrounding ambient conditions being assumed constant. This part of IEC 60287 provides formulae for thermal resistance. This second edition of IEC 60287-2-1 cancels and replaces the first edition, published in 1994, Amendment 1:2001, Amendment 2:2006 and Corrigendum 1:2008. This edition includes the following significant technical changes with respect to the previous edition:
    a) inclusion of a reference to the use of finite element methods where analytical methods are not available for the calculation of external thermal resistance;
    b) explanation about SL and SA type cables;
    c) calculation method for T3 for unarmoured three-core cables with extruded insulation and individual copper tape screens on each core;
    d) change of condition for X in 5.4;
    e) inclusion of constants or installation conditions for water filled ducts in Table 4.

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

    Committee TC 20
    Development Note Supersedes IEC 60287. (03/2001) Stability date: 2019. (04/2015)
    Document Type Redline
    Publisher International Electrotechnical Committee
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    BS 7923(2004) : 2004 ELECTRIC CABLES - INTERNAL GAS-PRESSURE CABLES AND ACCESSORIES FOR ALTERNATING VOLTAGES UP TO AND INCLUDING 275 KV (U[M] = 300 KV) - REQUIREMENTS AND TEST METHODS
    13/30288278 DC : 0 BS IEC 60287-2-3 - ELECTRIC CABLES - CALCULATION OF THE CURRENT RATING - PART 2-3: CABLES INSTALLED IN VENTILATED TUNNELS
    BS 7769-3-2(2012) : 2012 ELECTRIC CABLES - CALCULATION OF THE CURRENT RATING - PART 3-2: SECTIONS ON OPERATING CONDITIONS - ECONOMIC OPTIMIZATION OF POWER CABLE SIZE
    IEEE 525 : 2007 DESIGN AND INSTALLATION OF CABLE SYSTEMS IN SUBSTATIONS
    IEC 60853-3:2002 Calculation of the cyclic and emergency current rating of cables - Part 3: Cyclic rating factor for cables of all voltages, with partial drying of the soil
    HD 60364-5-52:2011/A11:2017 LOW-VOLTAGE ELECTRICAL INSTALLATIONS - PART 5-52: SELECTION AND ERECTION OF ELECTRICAL EQUIPMENT - WIRING SYSTEMS
    BS IEC 60287-2-3 : 2017 ELECTRIC CABLES - CALCULATION OF THE CURRENT RATING - PART 2-3: THERMAL RESISTANCE - CABLES INSTALLED IN VENTILATED TUNNELS
    CEI 20-21/3-2 : 2007 ELECTRIC CABLES - CALCULATION OF THE CURRENT RATING - PART 3-2: SECTIONS ON OPERATING CONDITIONS - ECONOMIC OPTIMIZATION OF POWER CABLE SIZE
    BS IEC 60287-1-3:2002 Electric cables. Calculation of the current rating Current rating equations (100 % load factor) and calculation of losses - Current sharing between parallel single-core cables and calculation of circulating current losses
    IEC 60364-5-52:2009 Low-voltage electrical installations - Part 5-52: Selection and erection of electrical equipment - Wiring systems
    NFC 32 902 : 1998 INSULATED CABLES AND CORDS FOR INSTALLATIONS - POWER CABLE ACCESSORIES INTENDED FOR INDUSTRY, FOR RATED VOLTAGE 0,6/1(1,2) KV - TEST METHODS AND TEST REQUIREMENTS
    IEC 60287-1-3:2002 Electric cables - Calculation of the current rating - Part 1-3: Current rating equations (100 % load factor) and calculation of losses - Current sharing between parallel single-core cables and calculation of circulating current losses
    IEC 60287-2-3:2017 Electric cables - Calculation of the current rating - Part 2-3: Thermal resistance - Cables installed in ventilated tunnels
    IEC 60287-2-2:1995 Electric cables - Calculation of the current rating - Part 2: Thermal resistance - Section 2: A method for calculating reduction factors for groups of cables in free air, protected from solar radiation
    IEEE 45.8:2016 ELECTRICAL INSTALLATIONS ON SHIPBOARD - CABLE SYSTEMS
    BS 7922(2004) : 2004 ELECTRIC CABLES - FLUID-FILLED, PAPER- AND PPL-INSULATED, METAL-SHEATHED CABLES AND ACCESSORIES FOR ALTERNATING VOLTAGES UP TO AND INCLUDING 400 KV (U[M] = 420 KV) - REQUIREMENTS AND TEST METHODS
    BS IEC 60853-3 : 2002 CALCULATION OF THE CYCLIC AND EMERGENCY CURRENT RATING OF CABLES - PART 3: CYCLIC RATING FACTOR FOR CABLES OF ALL VOLTAGES, WITH PARTIAL DRYING OF THE SOIL
    IEEE 848:2015 PROCEDURE FOR THE DETERMINATION OF THE AMPACITY DERATING FACTOR FOR FIRE-PROTECTED CABLE SYSTEMS
    BS 7454(1991) : 1991 METHOD FOR CALCULATION OF THERMALLY PERMISSIBLE SHORT-CIRCUIT CURRENTS, TAKING INTO ACCOUNT NON-ADIABATIC HEATING EFFECTS
    S.R. HD 60364-5-52:2011 LOW-VOLTAGE ELECTRICAL INSTALLATIONS - PART 5-52: SELECTION AND ERECTION OF ELECTRICAL EQUIPMENT - WIRING SYSTEMS
    IEC 60287-3-2:2012 Electric cables - Calculation of the current rating - Part 3-2: Sections on operating conditions - Economic optimization of power cable size
    IEC 60364-5-523:1999 Electrical installations of buildings - Part 5: Selection and erection of electrical equipment - Section 523: Current-carrying capacities in wiring systems
    BS IEC 60287-3-2 : 2012 ELECTRIC CABLES - CALCULATION OF THE CURRENT RATING - PART 3-2: SECTIONS ON OPERATING CONDITIONS - ECONOMIC OPTIMIZATION OF POWER CABLE SIZE
    05/30131315 DC : DRAFT JUN 2005 IEC 60287-3-3 - ELECTRIC CABLES - CALCULATION OF THE CURRENT RATING - PART 3-3: SECTIONS ON OPERATING CONDITIONS - CABLES CROSSING EXTERNAL HEAT SOURCES

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

    IEC TR 62095:2003 Electric cables - Calculations for current ratings - Finite element method
    IEC 60853-2:1989 Calculation of the cyclic and emergency current rating of cables. Part 2: Cyclic rating of cables greater than 18/30 (36) kV and emergency ratings for cables of all voltages
    IEC 60287-3-1:2017 Electric cables - Calculation of the current rating - Part 3-1: Operating conditions - Site reference conditions
    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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