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  • IEC 61865:2001

    Current The latest, up-to-date edition.

    Overhead lines - Calculation of the electrical component of distance between live parts and obstacles - Method of calculation

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

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

    Published date:  04-07-2001

    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
      3.1 Definitions
      3.2 Symbols
    4 Approach used to derive the electrical distance
    5 Overvoltages
      5.1 Classification of overvoltages
      5.2 Temporary overvoltages
      5.3 Slow-front overvoltages
      5.4 Fast-front overvoltages
    6 Required withstand voltage of the air gap
      6.1 General
      6.2 Calculation of the required withstand voltage
    7 Calculation of the distance associated with the
      overvoltages
    Annex A (informative) Relationship between U(50) and the
            gap length, d
    Annex B (informative) Example of the calculation of the
            electrical component
    Bibliography

    Abstract - (Show below) - (Hide below)

    Gives guidance for the calculation of electrical distances between live and earthed parts required to prevent air-gap breakdown which may endanger members of the public who legitimately come close to live parts. Applies only to overhead lines designed to operate at more than 45 kV phase-to-phase a.c. It manages the electrical component of distances between conductors and movable objects - vehicles on the ground, vessels on water, persons on top of objects or on the ground, wildlife on the ground (but not airborne), etc.

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

    Committee TC 11
    Development Note Stability Date: 2017. (09/2017)
    Document Type Standard
    Publisher International Electrotechnical Committee
    Status Current

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

    CLC/TR 50488:2006 Railway applications - Safety measures for the personnel working on or near overhead contact lines
    14/30318963 DC : DRAFT DEC 2014 BS EN 61057 - LIVE WORKING - INSULATING AERIAL DEVICES FOR MOUNTING ON A CHASSIS
    EN 61057:2017 Live working - Insulating aerial devices for mounting on a chassis
    I.S. EN 61057:2017 LIVE WORKING - INSULATING AERIAL DEVICES FOR MOUNTING ON A CHASSIS
    CEI CLC/TR 50488 : 2007 RAILWAY APPLICATIONS - SAFETY MEASURES FOR PERSONNEL WORKING NEAR OVERHEAD CONTACT LINES
    BS EN 61057:1994 Aerial devices with insulating boom used for live working exceeding 1 kV a.c.
    IEC 61057:2017 Live working - Insulating aerial devices for mounting on a chassis
    S.R. CLC/TR 50488:2007 RAILWAY APPLICATIONS - SAFETY MEASURES FOR THE PERSONNEL WORKING ON OR NEAR OVERHEAD CONTACT LINES

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

    IEC 61472:2013 Live working - Minimum approach distances for a.c. systems in the voltage range 72,5 kV to 800 kV - A method of calculation
    IEC 60050-601:1985 International Electrotechnical Vocabulary (IEV) - Part 601: Generation, transmission and distribution of electricity - General
    IEC 60071-2:1996 Insulation co-ordination - Part 2: Application guide
    IEC 60060-1:2010 High-voltage test techniques - Part 1: General definitions and test requirements
    IEC 60071-1:2006+AMD1:2010 CSV Insulation co-ordination - Part 1: Definitions, principles and rules
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