• EN 61251:2016

    Current The latest, up-to-date edition.

    Electrical insulating materials and systems - A.C. voltage endurance evaluation

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    Published date:  26-02-2016

    Publisher:  European Committee for Standards - Electrical

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

    FOREWORD
    INTRODUCTION
    1 Scope
    2 Normative references
    3 Terms, definitions and symbols
    4 Voltage endurance
    5 Test methods
    6 Evaluation of voltage endurance
    Annex A (informative) - The Weibull distribution
    Bibliography
    Annex ZA (normative) - Normative references to
             international publications with their
             corresponding European publications

    Abstract - (Show below) - (Hide below)

    IEC 61251:2015 describes many of the factors involved in voltage endurance tests on electrical insulating materials and systems. It describes the voltage endurance graph, lists test methods illustrating their limitations and gives guidance for evaluating the sinusoidal a.c. voltage endurance of insulating materials and systems from the results of the tests. This International Standard is applicable over the voltage frequency range 20 Hz to 1 000 Hz. The general principles can also be applicable to other voltage shapes, including impulse voltages. The terminology to be used in voltage endurance is defined and explained. This first edition of IEC 61251 cancels and replaces the second edition of IEC TS 61251, published in 2008. This edition constitutes a technical revision and includes the following significant technical changes with respect to the second edition of IEC TS 61251:a) upgrade from Technical Specification to an International Standard;b) clarification of issues raised since publication of IEC TS 61251.

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    Committee CLC/SR 112
    Document Type Standard
    Publisher European Committee for Standards - Electrical
    Status Current

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

    IEC 60243-1:2013 Electric strength of insulating materials - Test methods - Part 1: Tests at power frequencies
    EN 60243-3:2014 Electric strength of insulating materials - Test methods - Part 3: Additional requirements for 1,2/50 µs impulse tests
    IEC 61649:2008 Weibull analysis
    EN 60343:1992 Recommended test methods for determining the relative resistance of insulating materials to breakdown by surface discharges
    IEC 60343:1991 Recommended test methods for determining the relative resistance of insulating materials to breakdown by surface discharges
    EN 61649:2008 Weibull analysis
    IEC 60243-3:2013 Electric strength of insulating materials - Test methods - Part 3: Additional requirements for 1,2/50 µs impulse tests
    EN 60243-1:2013 ELECTRIC STRENGTH OF INSULATING MATERIALS - TEST METHODS - PART 1: TESTS AT POWER FREQUENCIES (IEC 60243-1:2013)
    IEC 60243-2:2013 Electric strength of insulating materials - Test methods - Part 2: Additional requirements for tests using direct voltage
    IEC 62539:2007 Guide for the statistical analysis of electrical insulation breakdown data
    EN 60243-2:2014 Electric strength of insulating materials - Test methods - Part 2: Additional requirements for tests using direct voltage
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