• I.S. EN 60726:2003

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    DRY-TYPE POWER TRANSFORMERS

    Available format(s):  Hardcopy, PDF

    Superseded date:  24-08-2004

    Language(s):  English

    Published date:  01-01-2003

    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
    PREFACE
    SECTION ONE - GENERAL
    1 Scope
    2 Service conditions
    3 Definitions
    4 Tappings
    5 Connections
    6 Ability to withstand short circuit
    SECTION TWO - RATING
    7 Rating
    8 Rating plates
    SECTION THREE - COOLING METHODS AND TEMPERATURE RISE
    9 Identification according to cooling method
    10 Temperature-rise limits
    SECTION FOUR - INSULATION LEVELS
    11 Insulation levels
    SECTION FIVE - TESTS
    12 General requirements for tests
    13 Measurement of winding resistance
    14 Measurement of voltage ratio and check of voltage
       vector relationship
    15 Measurement of impedance voltage (principal tapping),
       short-circuit impedance and load loss
    16 Measurement of no-load loss and current
    17 Separate-source voltage withstand test
    18 Induced overvoltage withstand test
    19 Lightning impulse test
    20 Partial discharge measurement
    21 Temperature-rise test
    22 Measurement of sound level
    23 Short-circuit test
    24 Tolerances
    SECTION SIX - ENCLOSURES
    25 Degrees of protection provided by enclosures
    APPENDIX A - Information required with enquiry and order
    APPENDIX B - Unusual service conditions

    Abstract - (Show below) - (Hide below)

    Describes requirements for dry-type power transformers (including auto-transformers) having values of highest voltage for equipment up to and including 36 kV.

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

    Development Note Supersedes I.S. HD 464 (03/2003)
    Document Type Standard
    Publisher National Standards Authority of Ireland
    Status Superseded
    Superseded By

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

    IEC 60270:2000+AMD1:2015 CSV High-voltage test techniques - Partial discharge measurements
    EN 60076-5:2006 POWER TRANSFORMERS - PART 5: ABILITY TO WITHSTAND SHORT-CIRCUIT
    IEC 60076-5:2006 Power transformers - Part 5: Ability to withstand short circuit
    EN 60270:2001/A1:2016 HIGH-VOLTAGE TEST TECHNIQUES - PARTIAL DISCHARGE MEASUREMENTS (IEC 60270:2000/A1:2015)
    IEC 60085:2007 ELECTRICAL INSULATION - THERMAL EVALUATION AND DESIGNATION
    IEC 60076-3:2013 Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air
    HD 566 : 200S1 THERMAL EVALUATION AND CLASSIFICATION OF ELECTRICAL INSULATION
    IEC 60529:1989+AMD1:1999+AMD2:2013 CSV Degrees of protection provided by enclosures (IP Code)
    IEC 60076-1:2011 Power transformers - Part 1: General
    EN 60071-1:2006/A1:2010 INSULATION CO-ORDINATION - PART 1: DEFINITIONS, PRINCIPLES AND RULES
    IEC 60084:1957 Recommendations for Mercury-arc Convertors
    EN 60076-1:2011 POWER TRANSFORMERS - PART 1: GENERAL (IEC 60076-1:2011)
    IEC 60071-3:1982 Insulation co-ordination - Part 3: Phase-to-phase insulation co-ordination - Principles, rules and application guide
    IEC 60071-2:1996 Insulation co-ordination - Part 2: Application guide
    IEC 60076-2:2011 Power transformers - Part 2: Temperature rise for liquid-immersed transformers
    EN 60071-2 : 1997 INSULATION CO-ORDINATION - APPLICATION GUIDE
    IEC 60186:1987 Voltage transformers
    IEC 60119:1960 Recommendations for polycrystalline semiconductor rectifier stacks and equipment
    EN 60529:1991/AC:2016-12 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE) (IEC 60529 EDITION 2.2 CORRIGENDUM 2:2015)
    IEC 60071-1:2006+AMD1:2010 CSV Insulation co-ordination - Part 1: Definitions, principles and rules
    EN 60076-2:2011 POWER TRANSFORMERS - PART 2: TEMPERATURE RISE FOR LIQUID-IMMERSED TRANSFORMERS
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