Draft Document - Three-phase oil-immersed distribution transformers 50 Hz, from 50 kVA to 2500 kVA with highest voltage for equipment not exceeding 36 kV - Part 4: Requirements and tests concerning pressurised corrugated tanks; German version EN 50464-4:2007/FprAA:2011
文件草案——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4部分:关于压力波纹罐的要求和试验;德文版EN 50464-4:2007/FprAA:2011