Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 2 500 kVA with highest voltage for equipment not exceeding 36 kV Part 1: General requirements; German version EN 50464-1:2007 + A1:2012
最高电压不超过36 kV的设备用50 Hz、50 kVA至2500 kVA的三相油浸式配电变压器第1部分:一般要求;德文版EN 50464-1:2007+A1:2012