• IEC 60287-1-2:1993

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    Electric cables - Calculation of the current rating - Part 1: Current rating equations (100 % load factor) and calculations of losses - Section 2: Sheath eddy current loss factors for two circuits in flat formation

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

    Superseded date:  12-05-2023

    Language(s):  English - French, English, French, Spanish, Castilian

    Published date:  09-12-1993

    Publisher:  International Electrotechnical Committee

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

    FOREWORD
    1 Scope
    2 Normative references
    3 Symbols
    4 Description of method
        4.1 General
        4.2 Outline of method
        4.3 Criteria for use of formulae and co-efficients
    5 Formulae for sheath loss factors for high-
        resistance sheaths in a single circuit
    6 Calculation of the coefficients H, N and J
        6.1 Allocation of coefficients to each cable,
              time sequence and phase identification
        6.2 Calculation of coefficients H(1,2 and 3)
              table 1
        6.3 Calculation of coefficients N(1,2,3,4,5 and 6)
              table 2
        6.4 Calculation of coefficients J(1,2,3,4,5 and 6)
              tables 3 to 11
        6.5 Calculation of coefficients Gs and gs
    7 Notes on transposition of cables
    8 Worked examples of calculation of eddy current losses
        8.1 Introduction
        8.2 Example 1
        8.3 Example 2
    Tables

    Abstract - (Show below) - (Hide below)

    Provides a method for calculating theeddy current losses in the metallic sheaths of single-core cablesarranged as a three-phase, double-circuit in flat formation.

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

    Committee TC 20
    Development Note Also numbered as BS 7769-1.2(1994) (10/2005) Stability Date: 2018. (10/2012)
    Document Type Standard
    Publisher International Electrotechnical Committee
    Status Superseded
    Superseded By

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

    IEEE 525-2007 IEEE Guide for the Design and Installation of Cable Systems in Substations
    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
    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
    IEEE 848-2015 IEEE Standard Procedure for the Determination of the Ampacity Derating Factor for Fire-Protected Cable Systems

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

    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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