• BS EN 60216-5:2008

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    Electrical insulating materials. Thermal endurance properties Determination of relative thermal endurance index (RTE) of an insulating material

    Available format(s):  Hardcopy, PDF

    Superseded date:  16-01-2023

    Language(s):  English

    Published date:  29-08-2008

    Publisher:  British Standards Institution

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

    1 Scope
    2 Normative references
    3 Terms, definitions, symbols, units and abbreviations
      3.1 Terms, abbreviations, and definitions
      3.2 Symbols and units
      3.3 Objectives of RTE determination
    4 Experimental procedures
      4.1 Selection of reference EIM
      4.2 Selection of diagnostic test for extent of ageing
      4.3 Ageing procedures
    5 Calculation procedures
      5.1 Thermal endurance data - Calculation of intermediate
          parameters
      5.2 Calculation of RTE
      5.3 Statistical and numerical tests
          5.3.1 Tests of IEC 60216-3
          5.3.2 Precision of correlation time
          5.3.3 Lower confidence interval of RTE
          5.3.4 Extrapolation
    6 Report
      6.1 Results of statistical and numerical tests
      6.2 Results
      6.3 Report
    7 Material testing by short-term thermal ageing
    8 Insulation classification
    Annex A (informative) - Repeatability of correlation time
    Annex B (informative) - Thermal class assignment
    Annex C (informative) - Computer program
    Annex D (informative) - Selection of the reference EIM
    Annex ZA (normative) - Normative references to international
                           publications with their corresponding
                           European publications
    Bibliography

    Abstract - (Show below) - (Hide below)

    Defines the experimental and calculation procedures to be used for deriving the relative thermal endurance index of a material from experimental data obtained in accordance with the instructions of IEC 60216-1 and IEC 60216-2.

    Scope - (Show below) - (Hide below)

    IEC 60216-5 specifies the experimental and calculation procedures to be used for deriving the relative thermal endurance index of a material from experimental data obtained in accordance with the instructions of IEC 60216-1 and IEC 60216-2. The calculation procedures are supplementary to those of IEC 60216-3. Guidance is also given for assessment of thermal ageing after a single fixed time and temperature, without extrapolation. The experimental data may in principle be obtained using destructive, non-destructive or proof tests, although destructive tests have been much more extensively employed. Data obtained from non-destructive or proof tests may be \'censored\', in that measurement of times taken to reach the endpoint may have been terminated at some point after the median time but before all specimens have reached end-point (see IEC 60216-1). Guidance is given for preliminary assignment of a thermal class for an insulating material, based upon the thermal ageing performance. The calculation procedures of this standard also apply to the determination of the thermal class of an electrical insulation system when the thermal stress is the prevailing ageing factor. This third edition clarifies and corrects a few items and adds an Annex D which provides criteria for the selection of the reference (or reference EIM). The third edition provides instructions for deriving a provisional estimate of the temperature up to which a material may give satisfactory performance in an application (by comparative thermal ageing with a material of known performance). The contents of the corrigendum of December 2009 have been included in this copy.
    Please be aware that the computer program provided in this publication is not compatible with the 64-bit version of Windows 7.

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

    Committee GEL/112
    Development Note Supersedes BS 5691-5(1995) & 99/245772 DC (07/2003) Supersedes 06/30159335 DC. (08/2008)
    Document Type Standard
    Publisher British Standards Institution
    Status Superseded
    Superseded By
    Supersedes

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

    EN 60216-1:2013 Electrical insulating materials - Thermal endurance properties - Part 1: Ageing procedures and evaluation of test results
    EN 60085:2008 Electrical insulation - Thermal evaluation and designation
    IEC 60216-2:2005 Electrical insulating materials - Thermal endurance properties - Part 2: Determination of thermal endurance properties of electrical insulating materials - Choice of test criteria
    EN 60216-3:2006 ELECTRICAL INSULATING MATERIALS - THERMAL ENDURANCE PROPERTIES - PART 3: INSTRUCTIONS FOR CALCULATING THERMAL ENDURANCE CHARACTERISTICS
    EN 60216-2:2005 Electrical insulating materials - Thermal endurance properties - Part 2: Determination of thermal endurance properties of electrical insulating materials - Choice of test criteria
    IEC 60085:2007 Electrical insulation - Thermal evaluation and designation
    IEC 60216-1:2013 Electrical insulating materials - Thermal endurance properties - Part 1: Ageing procedures and evaluation of test results
    IEC 60216-3:2006 Electrical insulating materials - Thermal endurance properties - Part 3: Instructions for calculating thermal endurance characteristics
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