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AS
AS 2374.2-1997

AS 2374.2-1997

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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Superseded date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

Superseded by

AS/NZS 60076.2:2013

Language(s)

English

Published date

05-09-1997

Publisher

Standards Australia

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Hardcopy - English
PDF 1 User - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
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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

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.

Committee
EL-008
DocumentType
Standard
ISBN
0-7337-1393-9
Pages
28
PublisherName
Standards Australia
Status
Superseded
SupersededBy
Supersedes
UnderRevision

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.

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.

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

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 (Reconfirmed 2016)
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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