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Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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DRY-TYPE POWER TRANSFORMERS
Hardcopy , PDF
24-08-2004
English
01-01-2003
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.
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
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