UNE 21428-2-1:1996被替代
Three-phased Oil-immersed Distribution Transformers 50 Hz, From 50 To 2500 Kva With Highest Voltage For Equipment Not Exceeding 36 Kv - Part 2: Distribution Transformers With Cable Boxes On The High Voltage And/or Low Voltage Side - Section 1: General Requirements
出版：Asociacion Espanola de Normalizacion
专家解读视频
