HD 538.1 S1 prAA-1992 100-250KVA、50Hz、设备电压不超过36KV的三相干式配电变压器.第1部分:设备最高电压不超24KV变压器用的要求和总要求
Three-phase dry-type distribution transformers 50 Hz, from 100 to 2500 kVA, with highest voltage for equipment not exceeding 36 kV; part 1: general requirements and requirements for transformers with highest voltage for equipment not exceeding 24 kV