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