Classification of environmental conditions -- Part 2-3: Environmental conditions appearing in nature - Air pressure (IEC 60721-2-3:2013) (english version)
Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV - Part 1: General requirements; German version EN 50588-1:2015— 32 стр.
Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV - Part 1: General requirements; German version EN 50588-1:2017— 37 стр.
Medium power transformers 50 Hz, with highest voltage for equipment not exceeding 36 kV - Part 1: General requirements; German version EN 50588-1:2017— 37 стр.