Dry-type transformers 50 Hz, 100 up to 2500 kVA - Part 1: General requirements and requirements for transformers U<(Index)m> up to 24 kV; Amendment 1:1995; German version HD 538.1 S1/A1:1995— 3 стр.
Dry-type transformers 50 Hz, 100 up to 2500 kVA; general requirements and requirements for transformers U<(Index)m> up to 24 kV; German version of HD 538 S1:1992— 11 стр.
Dry-type transformers 50 Hz, from 100 to 2500 kVA - Part 2: Supplementary requirements for transformers with highest voltage for equipment at 36 kV; German version HD 538.2 S1:1995— 5 стр.
