Transformers; three-phase oil immersed transformers with off-circuit tap-changer or with on-load tap-changer 12500 to 80000 kVA for 50 Hz and U<(Index)m> up to 123 kV; requirements and accessories— 12 стр.
Powertransformers with off circuit tap-changer resp. on load tap changer; main dimensions and accessories, 2000 to 10000 kVA and up to insulation class 110 N— 4 стр.