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    AS 2374.2-1997

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Superseded date:  30-06-2017

    Language(s):  English

    Published date:  05-09-1997

    Publisher:  Standards Australia

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

    1 - AS 2374.2-1997 POWER TRANSFORMERS - TEMPERATURE RISE
    4 - PREFACE
    6 - CONTENTS
    7 - 1 Scope
    7 - 2 Normative references
    7 - 3 Identification symbols according to cooling method
    9 - 4 Temperature-rise limits
    9 - 4.1 General
    9 - 4.2 Normal temperature-rise limits at continuous rated power
    11 - 4.3 Modified requirements because of unusual service conditions
    12 - 4.4 Temperature rise during a specified load cycle
    12 - 5 Test of temperature rise
    12 - 5.1 General
    13 - 5.2 Test methods for temperature-rise determination
    16 - 5.3 Determination of oil temperatures
    17 - 5.4 Determination of average winding temperature
    18 - 5.5 Determination of winding temperature before shutdown
    18 - 5.6 Corrections
    19 - Annex A - Note on oil temperature in transformers with forced oil circulation
    21 - Annex B - Transient loading – Mathematical model and testing
    21 - B.1 General
    21 - B.2 Mathematical model for temperature distribution in a winding of an oil-immersed transformer - The hot-spot concept
    23 - B.3 Variable loading or cooling. Thermal time-constants
    23 - B.4 Recommendations for temperature-rise test with transient load
    25 - Annex C - Techniques used in temperature-rise testing of oil-immersed transformers
    25 - C.1 Truncation of a test to steady state
    28 - C.2 Procedure for winding resistance measurement after shutdown
    29 - C.3 Extrapolation of winding temperature to the instant of shutdown
    32 - C.4 Gas-in-oil analysis
    33 - APPENDIX ZZ - LIST OF VARIATIONS BETWEEN THIS STANDARD AND IEC 76-2
    34 - APPENDIX ZA - TYPICAL HEAT SINK

    Abstract - (Show below) - (Hide below)

    Specifies temperature-rise limits and methods of test for measuring temperature rise. Based on but not equivalent to, and has been reproduced from IEC 76-2:1993. Includes Australian variations.

    Scope - (Show below) - (Hide below)

    This part of International Standard IEC 76 identifies transformers according to their cooling methods, defines temperature-rise limits and details the methods of test for temperature-rise measurements. It applies to transformers as defined in the scope of IEC 76-1.

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

    Committee EL-008
    Document Type Standard
    Publisher Standards Australia
    Status Superseded
    Superseded By
    Supersedes
    Under Revision

    History - (Show below) - (Hide below)

    First published as part of AS C61-1931.Second edition 1946.Third edition 1963.Fourth edition 1970.Revised and redesignated in part as AS 2374.2-1982.Second edition 1997. First published as part of AS C61-1931. Second edition 1946. Third edition 1963. Fourth edition 1970. Revised and redesignated in part as AS 2374.2-1982. Second edition 1997.

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

    AS 3953-1996 Loading guide for dry-type power transformers
    AS 2735-1984 Dry-type power transformers
    AS 2768-1985 Electrical insulating materials - Evaluation and classification based on thermal endurance
    AS 2374.1-1997 Power transformers General
    AS 2421-1981 Guide to the selection and use of power transformers
    AS 1078-1984 Guide to loading of oil-immersed transformers

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

    AS 60146.1.1-2002 Semiconductor converters General requirements and line commutated converters - Specifications of basic requirements
    AS/NZS 2081.5:2002 Electrical equipment for coal and shale mines - Electrical protection devices - Earth-fault current limiters
    AS 60076.1-2005 Power transformers General (IEC 60076-1, Ed. 2.1 (2000) MOD)
    AS 2735-1984 Dry-type power transformers
    AS 2832.1-2004 Cathodic protection of metals Pipes and cables
    AS/NZS 2081:2011 Electrical protection devices for mines and quarries (Reconfirmed 2022)
    AS 60470-2001 High-voltage alternating current contactors and contactor-based motor starters (Reconfirmed 2015)
    AS 2067-2008 Substations and high voltage installations exceeding 1 kV a.c.
    AS 2374.1-1997 Power transformers General
    AS 61800.2-2004 Adjustable speed electrical power drive systems General requirements - Rating specifications for low voltage adjustable frequency a.c. power drive systems
    AS 2832.2-2003 Cathodic protection of metals Compact buried structures
    AS 2558-2006 Transformers for use on single-wire earth-return distribution systems
    AS 2374.7-1997 Power transformers - Loading guide for oil-immersed power transformers
    AS 1028-1992 Power reactors and earthing transformers
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