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 3: Determination of the power rating of a transformer loaded with non-sinusoidal currents
最高电压不超过36kV的设备用50Hz、50kVA至2500 kVA的三相油浸式配电变压器第3部分:负载非正弦电流的变压器额定功率的测定