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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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

    Superseded date:  28-07-2004

    Language(s): 

    Published date:  24-01-2003

    Publisher:  European Committee for Standards - Electrical

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

    SECTION ONE - GENERAL
    Clause
    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
    SECTION SEVEN - MISCELLANEOUS
    APPENDIX A - Information required with enquiry and order
    APPENDIX B - Climatic, environmental and fire behaviour classes
    Annexes
    Bibliography

    Abstract - (Show below) - (Hide below)

    Specifies requirements for dry-type power transformers (including auto-transformers) having values of highest voltage for equipment up to and including 36 kV. The following small and special dry-type transformers are not covered by this standard: -instrument transformers (covered by EN 60185 and 60186); -transformers for static convertors (covered by EN 60084, 60119 and 60146). Where IEC standards do not exist for other special transformers, this standard may be applicable as a whole or in part.

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

    Committee CLC/TC 14
    Development Note Supersedes HD 464 (03/2003)
    Document Type Standard
    Publisher European Committee for Standards - Electrical
    Status Superseded
    Superseded By

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

    BS EN 61800-4:2003 Adjustable speed electrical power drive systems General requirements. Rating specifications for a.c. power drive systems above 1000 V a.c. and not exceeding 35 kV
    CEI EN 61800-4 : 2003 ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 4: GENERAL REQUIREMENTS - RATING SPECIFICATIONS FOR A/C/ POWER DRIVE SYSTEMS ABOVE 1000 V A.C. AND NOT EXCEEDING 35 KV
    I.S. EN 61800-4:2003 ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 4: GENERAL REQUIREMENTS - RATING SPECIFICATIONS FOR A.C. POWER DRIVE SYSTEMS ABOVE 1000 V A.C. AND NOT EXCEEDING 35 KV
    EN 61800-4:2003 Adjustable speed electrical power drive systems - Part 4: General requirements - Rating specifications for a.c. power drive systems above 1 000 V a.c. and not exceeding 35 kV

    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
    IEC 60084:1957 Recommendations for Mercury-arc Convertors
    EN 60076-1:2011 POWER TRANSFORMERS - PART 1: GENERAL (IEC 60076-1:2011)
    IEC 60076-2:2011 Power transformers - Part 2: Temperature rise for liquid-immersed transformers
    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)
    EN 60076-2:2011 Power transformers - Part 2: Temperature rise for liquid-immersed transformers
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