• IEC 61857-22:2008

    Current The latest, up-to-date edition.

    Electrical insulation systems - Procedures for thermal evaluation - Part 22: Specific requirements for encapsulated-coil model - Wire-wound electrical insulation system (EIS)

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

    Language(s):  English - French, Spanish, Castilian

    Published date:  25-07-2008

    Publisher:  International Electrotechnical Committee

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

    FOREWORD
    INTRODUCTION
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Construction
      4.1 General information
      4.2 ECM components
      4.3 Assembly of the ECM
      4.4 Similarity of reference and candidate ECM
    5 Number of test objects
    6 Test procedure
      6.1 General
      6.2 Initial screening test
          6.2.1 General
          6.2.2 Initial dielectric test
      6.3 Thermal endurance test
          6.3.1 Endurance test cycle
          6.3.2 Thermal ageing
          6.3.3 Mechanical stress
          6.3.4 Thermal shock
          6.3.5 Moisture exposure
          6.3.6 Dielectric diagnostic test
    7 End-of-life criterion
    8 Analysing, reporting and classification
    Annex A (informative) Similarity of reference and
            candidate specimens
    Bibliography

    Abstract - (Show below) - (Hide below)

    IEC 61857-22:2008 provides a general-purpose procedure for the evaluation of wire-wound systems using a general purpose encapsulated-coil model (ECM) where the application is unknown. This second edition cancels and replaces the first edition published in 2002, and constitutes editorial revisions to make this standard compatible with Parts 1 and 21.

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

    Committee TC 112
    Development Note Stability Date: 2018. (11/2012)
    Document Type Standard
    Publisher International Electrotechnical Committee
    Status Current
    Supersedes

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

    06/30146693 DC : DRAFT FEB 2006
    BS EN 61857-31:2017 Electrical insulation systems. Procedures for thermal evaluation Applications with a designed life of 5 000 h or less
    08/30177151 DC : DRAFT JAN 2008 BS EN 61858 - ELECTRICAL INSULATION SYSTEMS - THERMAL EVALUATION OF MODIFICATIONS TO AN ESTABLISHED WIRE-WOUND EIS
    CEI EN 61857-31 : 1ED 2017 ELECTRICAL INSULATION SYSTEMS - PROCEDURES FOR THERMAL EVALUATION - PART 31: APPLICATIONS WITH A DESIGNED LIFE OF 5000 H OR LESS
    IEC TR 61857-2:2015 Electrical insulation systems - Procedures for thermal evaluation - Part 2: Selection of the appropriate test method for evaluation and classification of electrical insulation systems
    PD IEC/TR 61857-2:2015 Electrical insulation systems. Procedures for thermal evaluation Selection of the appropriate test method for evaluation and classification of electrical insulation systems
    I.S. EN 61857-31:2017 ELECTRICAL INSULATION SYSTEMS - PROCEDURES FOR THERMAL EVALUATION - PART 31: APPLICATIONS WITH A DESIGNED LIFE OF 5000 H OR LESS
    IEC 61857-31:2017 Electrical insulation systems - Procedures for thermal evaluation - Part 31: Applications with a designed life of 5 000 h or less
    16/30333476 DC : 0 BS EN 61857-31 - ELECTRICAL INSULATION SYSTEMS-PROCEDURES FOR THERMAL EVALUATION - PART 31: APPLICATIONS WITH A DESIGNED LIFE LESS THAN 5000 HOURS
    EN 61857-31:2017 Electrical insulation systems - Procedures for thermal evaluation - Part 31: Applications with a designed life of 5 000 h or less

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

    IEC 60050-195:1998 International Electrotechnical Vocabulary (IEV) - Part 195: Earthing and protection against electric shock
    IEC 61857-1:2008 Electrical insulation systems - Procedures for thermal evaluation - Part 1: General requirements - Low-voltage
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