• EN 60426:2007

    Current The latest, up-to-date edition.

    Electrical insulating materials - Determination of electrolytic corrosion caused by insulating materials - Test methods

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    Published date:  27-02-2007

    Publisher:  European Committee for Standards - Electrical

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

    INTRODUCTION
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 General description of the test method
    5 Test specimens
       5.1 General
       5.2 Cut surfaces of rigid materials (blocks, plates, sheets
            or semi-finished materials)
       5.3 Cast, moulding, injection and pressed materials
       5.4 Cut surfaces of flexible films, foils and thin sheets
       5.5 Adhesive tapes
       5.6 Flexible sleeving and tubing
       5.7 Lacquers and insulating varnishes
       5.8 Cleanliness of contact surfaces
       5.9 Number of test specimens
    6 Test strips
       6.1 General
       6.2 Preparation of the test strips
       6.3 Cleanliness of test strips
    7 Test device
    8 Test conditions
    9 Test procedure
    10 Evaluation
       10.1 General evaluation
       10.2 Visual inspection of the test strips
       10.3 Tensile strength of test strips
    11 Evaluation of corrosion on copper strips
    12 Test report
    Annex A (normative) Tables for the evaluation of corrosion on
                          brass and aluminium strips
    Annex B (informative) Notes on visual evaluation
    Annex C (informative) Copper wire tensile strength method
    Annex ZA (normative) Normative references to international
                          publications with their corresponding
                          European publications

    Abstract - (Show below) - (Hide below)

    Determines the ability of insulating materials to produce electrolytic corrosion on metals being in contact with them under the influence of electric stress, high humidity and elevated temperature. The effect of electrolytic corrosion is assessed in one test by using consecutively two methods: - visual semi-quantitative method consisting in comparing visually the corrosion appearing on the anode and cathode metal strips, with those given in the reference figures. This method consists of the direct visual assessment of the degree of corrosion of two copper strips, acting as anode and cathode respectively, placed in contact with the tested insulating material under a d.c. potential difference at specified environmental conditions. The degree of corrosion is assessed by visually comparing the corrosion marks on the anode and cathode metal strips with those shown in the reference figures; - quantitative method, which involves the tensile strength measurement, carried out on the same anode and cathode metal strips after visual inspection. An additional quantitative test method for determining electrolytic corrosion, which involves tensile strength measurement of copper wire, is described in the informative Annex C. The main changes with respect to the previous edition are listed below: - experience has indicated the need for improved description of the experimental method. It describes a revised procedure for the visual and tensile strength test method that overcomes the limitations of the first edition; - one older method of the first edition has partly been maintained in the informative annex.

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

    Committee CLC/SR 112
    Development Note Supersedes UNE 21362. (02/2010)
    Document Type Standard
    Publisher European Committee for Standards - Electrical
    Status Current
    Supersedes

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

    I.S. EN 60674-2:2017 SPECIFICATION FOR PLASTIC FILMS FOR ELECTRICAL PURPOSES - PART 2: METHODS OF TEST
    CEI EN 60454-2 : 2008 PRESSURE-SENSITIVE ADHESIVE TAPES FOR ELECTRICAL PURPOSES - PART 2: METHODS OF TEST
    BS EN 1965-2:2011 Structural adhesives. Corrosion Determination and classification of corrosion to a brass substrate
    EN 60684-2:2011 Flexible insulating sleeving - Part 2: Methods of test
    EN 60454-2:2007 PRESSURE-SENSITIVE ADHESIVE TAPES FOR ELECTRICAL PURPOSES - PART 2: METHODS OF TEST
    BS EN 60454-2:2007 Pressure-sensitive adhesive tapes for electrical purposes Methods of test
    BS EN 60674-2:2017+A1:2019 Specification for plastic films for electrical purposes Methods of test
    I.S. EN 60454-2:2007 PRESSURE-SENSITIVE ADHESIVE TAPES FOR ELECTRICAL PURPOSES - PART 2: METHODS OF TEST
    I.S. EN 1965-2:2011 STRUCTURAL ADHESIVES - CORROSION - PART 2: DETERMINATION AND CLASSIFICATION OF CORROSION TO A BRASS SUBSTRATE
    BS EN 60455-2:2015 Resin based reactive compounds used for electrical insulation Methods of test
    BS EN 60684-2:2011 Flexible insulating sleeving Methods of test
    I.S. EN 60455-2:2015 RESIN BASED REACTIVE COMPOUNDS USED FOR ELECTRICAL INSULATION - PART 2: METHODS OF TEST
    EN 60674-2:2017/AC:2018-01 SPECIFICATION FOR PLASTIC FILMS FOR ELECTRICAL PURPOSES - PART 2: METHODS OF TEST (IEC 60674-2:2016/COR1:2017)
    UNI EN 1965-2 : 2011 STRUCTURAL ADHESIVES - CORROSION - PART 2: DETERMINATION AND CLASSIFICATION OF CORROSION TO A BRASS SUBSTRATE
    I.S. EN 60684-2:2011 FLEXIBLE INSULATING SLEEVING - PART 2: METHODS OF TEST (IEC 60684-2:2011)
    10/30231835 DC : DRAFT SEP 2010 BS EN 1965-2 - STRUCTURAL ADHESIVES - CORROSION - PART 2: DETERMINATION AND CLASSIFICATION OF CORROSION TO A BRASS SUBSTRATE
    DIN EN 1965-2:2011-07 Structural adhesives - Corrosion - Part 2: Determination and classification of corrosion to a brass substrate
    EN 1965-2:2011 Structural adhesives - Corrosion - Part 2: Determination and classification of corrosion to a brass substrate
    CEI EN 60684-2 : 2012 FLEXIBLE INSULATING SLEEVING - PART 2: METHODS OF TEST
    EN 60455-2:2015 Resin based reactive compounds used for electrical insulation - Part 2: Methods of test

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

    IEC 60454-2:2007 Pressure-sensitive adhesive tapes for electrical purposes - Part 2: Methods of test
    EN 60068-3-4:2002 Environmental testing - Part 3-4: Supporting documentation and guidance - Damp heat tests
    IEC 60068-3-4:2001 Environmental testing - Part 3-4: Supporting documentation and guidance - Damp heat tests
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