Three-phase oil-immersed distribution transformers 50 Hz, 50 up to 2500 kVA; general requirements and requirements for transformers U<(Index)m> up to 24 kV; German version HD 428.1 S1:1992— 7 стр.
Three-phase oil-immersed distribution transformers 50 Hz, 50 up to 2500 kVA - Part 1: General requirements and requirements for transformers U<(Index)m> up to 24 kV; Amendment A1:1995-03; German version HD 428.1 S1/A1:1995— 3 стр.
Three-phase oil-immersed distribution transformers 50 Hz, 50 up to 2500 kVA - Part 1: General requirements and requirements for transformers U<(Index)m> up to 24 kV; Amendment A1:1995-03; German version HD 428.1 S1/A1:1995— 3 стр.
Three phase oil-immersed distribution transformers 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV - Part 2: Distribution transformers with cable boxes on the high voltage and/or low voltage side; section 1: General requirements; German version HD 428.2.1 S1:1994— 9 стр.
Three phase oil-immersed distribution transformers 50 Hz, from 50-up to 2500 kVA, with highest voltage for equipment not exceeding 36 kV - Part 3: Supplementary requirements for transformers with highest voltage for equipment equal to 36 kV; German version HD 428.3 S1:1994— 4 стр.
