NBN 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Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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
01-06-2005
12-01-2013
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
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