Three phase oil-immersed distribution transformers 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV -- Part 1: General requirements. Section 1: Requirement for multi-voltage transformers in high-voltage.
最高电压不超过36kV的设备用50Hz、50至2500kVA的三相油浸式配电变压器第1部分:一般要求 第1节:高压环境下多电压互感器的要求