
Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV. Supplementary requirements for transformers with highest voltage for equipment equal to 36 kV
出版:British Standards Institution

專家解讀視頻
1995 [15/09/1995]
? British Standards Institution 2013
HD 428.3:1994 - Identical