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CENELEC
EN 60726:2003

EN 60726:2003

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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

Superseded date

07-28-2004

Published date

01-24-2003

Publisher

European Committee for Standards - Electrical

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

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.

Committee
CLC/TC 14
DevelopmentNote
Supersedes HD 464 (03/2003)
DocumentType
Standard
PublisherName
European Committee for Standards - Electrical
Status
Superseded
SupersededBy

Standards Relationship
NF EN 60726 : 2003 Identical
SN EN 60726 : 2003 Identical
VDE 0532-726 : 2003 Identical
BS EN 60726:2003 Identical
NEN EN IEC 60726 : 2003 Identical
PN EN 60726 : 2003 Identical
UNE-EN 60726:2003 Identical
NBN EN 60726 : 2003 Identical
I.S. EN 60726:2003 Identical
DIN EN 60726 : 2003 Identical

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

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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