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    I.S. EN 61325:1997

    Current The latest, up-to-date edition.

    INSULATORS FOR OVERHEAD LINES WITH A NOMINAL VOLTAGE ABOVE 1000 V - CERAMIC OR GLASS INSULATOR UNITS FOR D.C. SYSTEMS - DEFINITIONS, TEST METHODS AND ACCEPTANCE CRITERIA

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  01-01-1997

    Publisher:  National Standards Authority of Ireland

    For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
    Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

    Dates of withdrawal of national standards are available from NSAI.

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

    FOREWORD
    SECTION 1: GENERAL
      1 Scope
      2 Normative references
      3 Definitions
    SECTION 2: INSULATORS
      4 Insulator classes and type
      5 Insulating materials
      6 Specified characteristics and features of a d.c. insulator unit
      7 Identification of insulators
    SECTION 3: CLASSIFICATION OF TESTS, SAMPLING RULES AND PROCEDURES
      8 Classification of tests
         8.1 Type Tests
         8.2 Sample Tests
         8.3 Routine tests
      9 Quality assurance
      10 Procedures for type and sample tests
         10.1 Insulator selection for type tests
         10.2 Sampling rules and procedures for sample tests
         10.3 Re-test procedure for the sample tests
    SECTION 4: TEST PROCEDURES FOR ELECTRICAL TESTS
      11 General requirements for high-voltage tests
      12 Standard atmospheric conditions and correction factors
         for electrical tests
         12.1 Standard reference atmosphere
         12.2 Correction factors for atmospheric conditions
      13 Mounting arrangements for electrical tests
      14 Lightning impulse voltage tests
         14.1 Test procedure
         14.2 Acceptance criteria
      15 Dry d.c. voltage tests
         15.1 Test procedure
         15.2 Acceptance criteria
      16 SF6 puncture withstand test
         16.1 Test method
         16.2 Acceptance criteria
      17 Impulse overvoltage puncture withstand test
      18 Ion migration test
         18.1 Reference conditions used to calculate the expected charge
         18.2 Test validity
         18.3 Test procedure
         18.4 Acceptance criteria
      19 Electrical body resistance test
         19.1 Test procedure
         19.2 Acceptance criteria
      20 Thermal runaway test
         20.1 Duration
         20.2 Procedure
         20.3 Acceptance criteria
      21 Routine electrical test
    SECTION 5: TEST PROCEDURES FOR MECHANICAL AND OTHER TESTS
      22 Verification of the dimensions
      23 Electromechanical failing load test
         23.1 Test procedure
         23.2 Acceptance criteria
         23.3 Coefficient for type tests
         23.4 Coefficients for sample tests
      24 Mechanical failing load test
         24.1 Test procedure
         24.2 Acceptance criteria
      25 Thermal-mechanical performance test
         25.1 Test procedure
         25.2 Acceptance criteria
      26 Residual mechanical strength test
         26.1 Previous tests
         26.2 Preparation of the test pieces
         26.3 Test procedure
         26.4 Test results
         26.5 Acceptance criteria for the type test
         26.6 Acceptance criteria for the sample test
         26.7 Comparison between type and sample test results
      27 Verification of the axial, radial and angular displacements
         27.1 Test procedure
         27.2 Acceptance criteria for cap and pin insulators
         27.3 Acceptance criteria for long rod insulators
      28 Verification of the locking system
         28.1 Conformity of the locking device
         28.2 Verification of locking
         28.3 Position of the locking device
         28.4 Procedure for the operation test
         28.5 Acceptance criteria for the operation test
      29 Temperature cycle test
         29.1 Test procedure for string insulator units composed
              of ceramic material
         29.2 Special test procedure for insulators with thick
              sections or very large insulators
         29.3 Complementary specifications
         29.4 Acceptance criteria
      30 Thermal shock test
         30.1 Test procedure
         30.2 Acceptance criteria
      31 Porosity test
         31.1 Test procedure
         31.2 Acceptance criteria
      32 Galvanizing test
         32.1 Test procedures
         32.2 Acceptance criteria
      33 Routine visual inspection
         33.1 Insulators with ceramic insulating parts
         33.2 Insulators with glass insulating parts
      34 Routine mechanical test
      35 Zinc sleeve test
         35.1 General requirements concerning the zinc sleeve
         35.2 Type test procedure
         35.3 Sample test procedure
      36 Zinc collar test
         36.1 General requirements for zinc collar
         36.2 Type and sample test procedure
    SECTION 6: TESTS ON STRING INSULATOR UNITS
      37 General
    Tables
    Figures
    Annexes
    A - Method of comparison of the results of the electromechanical
        or mechanical failing load type and sample tests
    B - Bibliography
    Annex ZA (normative) Normative references to international
             publications with their corresponding European
             publications

    Abstract - (Show below) - (Hide below)

    Applies to string insulator units of ceramic material or glass for use on d.c. overhead power lines with a nominal voltage greater than 1000 V.

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

    Development Note For CENELEC adoptions of IEC publications, please check www.iec.ch to be sure that you have any corrigenda that may apply. (01/2017)
    Document Type Standard
    Publisher National Standards Authority of Ireland
    Status Current

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

    ISO 9004-1:1994 Quality management and quality system elements Part 1: Guidelines
    IEC 60305:1995 Insulators for overhead lines with a nominal voltage above 1000 V - Ceramic or glass insulator units for a.c. systems - Characteristics of insulator units of the cap and pin type
    ISO 3951:1989 Sampling procedures and charts for inspection by variables for percent nonconforming
    ISO 9004-3:1993 Quality management and quality system elements — Part 3: Guidelines for processed materials
    IEC 60050-471:2007 International Electrotechnical Vocabulary (IEV) - Part 471: Insulators
    IEC 60383-1:1993 Insulators for overhead lines with a nominal voltage above 1000 V - Part 1: Ceramic or glass insulator units for a.c. systems - Definitions, test methods and acceptance criteria
    IEC 60672-3:1997 Ceramic and glass-insulating materials - Part 3: Specifications for individual materials
    ISO 1463:2003 Metallic and oxide coatings Measurement of coating thickness Microscopical method
    ISO 1461:2009 Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods
    ISO 2859-2:1985 Sampling procedures for inspection by attributes — Part 2: Sampling plans indexed by limiting quality (LQ) for isolated lot inspection
    HD 588.1 : S1 AMD 1 HIGH VOLTAGE TEST TECHNIQUES - GENERAL DEFINITIONS AND TEST REQUIREMENTS
    IEC 61211:2004 Insulators of ceramic material or glass for overhead lines with a nominal voltage greater than 1 000 V - Impulse puncture testing in air
    IEC TR 60797:1984 Residual strength of string insulator units of glass or ceramic material for overhead lines after mechanical damage of the dielectric
    ISO 9004-2:1991 Quality management and quality system elements Part 2: Guidelines for services
    HD 474 : 200S1 DIMENSIONS OF BALL AND SOCKET COUPLINGS OF STRING INSULATOR UNITS
    ISO 9000-2:1997 Quality management and quality assurance standards — Part 2: Generic guidelines for the application of ISO 9001, ISO 9002 and ISO 9003
    IEC 60437:1997 Radio interference test on high-voltage insulators
    ISO 1459:1973 Metallic coatings — Protection against corrosion by hot dip galvanizing — Guiding principles
    IEC TS 61245:2015 Artificial pollution tests on high-voltage ceramic and glass insulators to be used on d.c. systems
    IEC 60372:1984 Locking devices for ball and socket couplings of string insulator units - Dimensions and tests
    ISO 9001:2015 Quality management systems — Requirements
    ISO 2178:2016 Non-magnetic coatings on magnetic substrates Measurement of coating thickness Magnetic method
    ISO 9003:1994 Quality systems Model for quality assurance in final inspection and test
    ISO 1460:1992 Metallic coatings Hot dip galvanized coatings on ferrous materials Gravimetric determination of the mass per unit area
    IEC 60433:1998 Insulators for overhead lines with a nominal voltage above 1 000 V - Ceramic insulators for a.c. systems - Characteristics of insulator units of the long rod type
    IEC 60060-1:2010 High-voltage test techniques - Part 1: General definitions and test requirements
    IEC 60120:1984 Dimensions of ball and socket couplings of string insulator units
    ISO 2064:1996 Metallic and other inorganic coatings — Definitions and conventions concerning the measurement of thickness
    ISO 9000-1:1994 Quality management and quality assurance standards — Part 1: Guidelines for selection and use
    IEC 60383-2:1993 Insulators for overhead lines with a nominal voltage above 1000 V - Part 2: Insulator strings and insulator sets for a.c. systems - Definitions, test methods and acceptance criteria
    IEC 60672-1:1995 Ceramic and glass insulating materials - Part 1: Definitions and classification
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