NBN EN 50464-1 : 2007 AMD 1 2012
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
THREE-PHASE OIL-IMMERSED DISTRIBUTION TRANSFORMERS 50 HZ, FROM 50 KVA TO 2500 KVA WITH HIGHEST VOLTAGE FOR EQUIPMENT NOT EXCEEDING 36 KV - PART 1: GENERAL REQUIREMENTS
01-07-2015
12-01-2013
1 Scope
2 Normative references
3 Electrical characteristics
3.1 Rated power
3.2 Highest voltages for equipment for windings
3.3 Rated voltages of windings
3.4 Tapping
3.5 Connections
3.6 Dimensioning of neutral connection of the low-voltage winding
3.7 Short-circuit impedance
3.8 Losses and sound power level
3.9 Tolerances and penalties
3.10 Tests
3.11 Insulation levels and dielectric tests
4 Design requirements
4.1 Type of oil preservation system and degree of sealing
4.2 Terminal markings
4.3 Terminations
4.4 Distance between bushings
4.5 Rollers
5 Accessories
6 Efficiency and voltage drop (at reference temperature)
6.1 Efficiency
6.2 Voltage drop (u%)
Annex A (informative) Capitalisation evaluation
Bibliography
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