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  • IEC TS 61956:1999

    Withdrawn A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

    Methods of test for the evaluation of water treeing in insulating materials

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

    Withdrawn date:  06-01-2024

    Language(s):  English - French

    Published date:  08-10-1999

    Publisher:  International Electrotechnical Committee

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

    Foreword
    Introduction
    Clause
    1 General
       1.1 Scope
       1.2 Normative references
       1.3 Definitions
    2 Test method 1 (plaque test)
       2.1 Principle
       2.2 Test specimen
       2.3 Test apparatus
       2.4 Test procedure (ageing test)
       2.5 Examination after ageing
       2.6 Test report
    3 Test method 2 (cup test)
       3.1 Object and principle of test
       3.2 Test specimen
       3.3 Test apparatus
       3.4 Test procedure (ageing test)
       3.5 Examination of unaged and aged test specimens
       3.6 Test report
    Annex A (informative) Results and discussion of robin
            tests
    Figures
    Bibliography

    Abstract - (Show below) - (Hide below)

    Prescribes methods of test for the evaluation of water treeing in polyethylene (PE) and crosslinked polyethylene (XLPE) compounds, as a means to assess their relative performance under alternating (a.c.) electric stress, in the presence of water. Two methods are described, method I covering the evaluation of insulating materials alone, and method II covering the evaluation of insulating sandwiches consisting of an insulating material in intimate contact with semiconducting screens.

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

    Committee TC 112
    Development Note Also numbered as BS PD IEC 61956 (06/2001) Stability Date: 2021 (11/2017)
    Document Type Technical Specification
    Publisher International Electrotechnical Committee
    Status Withdrawn

    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
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