• I.S. EN 60255-21-3:1997

    Current The latest, up-to-date edition.

    ELECTRICAL RELAYS - PART 21: VIBRATION, SHOCK, BUMP AND SEISMIC TESTS ON MEASURING RELAYS AND PROTECTION EQUIPMENT - SECTION 3: SEISMIC TESTS

    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
    1 Scope and object
    2 Normative references
    3 Definitions
      3.1 Single axis sine sweep seismic test
      3.2 Biaxial test
      3.3 Biaxial multi-frequency random seismic test
      3.4 Standard response spectrum
      3.5 Damping
      3.6 Zero period acceleration
      3.7 Random motion sample
      3.8 Time-history
      3.9 Strong part of the time-history
    4 Requirements for single axis sine sweep seismic
      test (method A)
      4.1 Main parameters
      4.2 Test apparatus and mounting
      4.3 Test severity classes
    5 Requirements for biaxial multi-frequency random
      seismic test (method B)
      5.1 Main parameters
      5.2 Test apparatus and mounting
      5.3 Test severity classes
      5.4 Biaxial conditioning
    6 Selection of test severity classes
      6.1 Recommendations for selection of test classes
      6.2 identification of test method and severity class
    7 Test procedures
    8 Criteria for acceptance
    Annex A (informative) Seismic tests choice criteria
    ANNEX ZA (normative) OTHER INTERNATIONAL PUBLICATIONS QUOTED
                           IN THIS STANDARD WITH THE REFERENCES OF
                           THE RELEVANT EUROPEAN PUBLICATIONS

    Abstract - (Show below) - (Hide below)

    Defines the vibration, shock, bump and seismic requirements applicable to electromechanical and static measuring relays and protection equipment, with or without output contacts.

    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)

    IEC 60255-21-2:1988 Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section Two: Shock and bump tests
    EN 60068-2-57:2013 Environmental testing - Part 2-57: Tests - Test Ff: Vibration - Time-history and sine-beat method
    IEC 60068-2-57:2013 Environmental testing - Part 2-57: Tests - Test Ff: Vibration - Time-history and sine-beat method
    IEC 60068-3-3:1991 Environmental testing - Part 3-3: Guidance - Seismic test methods for equipments
    EN 60068-3-3:1993 Environmental testing - Part 3: Guidance - Seismic test methods for equipments
    ISO 2041:2009 Mechanical vibration, shock and condition monitoring Vocabulary
    HD 323.2.6 : 200S2 BASIC ENVIRONMENTAL TESTING PROCEDURES - TESTS - TEST FC AND GUIDANCE: VIBRATION (SINUSOIDAL)
    IEC 60255-21-1:1988 Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section One: Vibration tests (sinusoidal)
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