
Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV. Distribution transformers with cable boxes on the high voltage and/or low voltage side. Cable boxes of type 1 for use on distribution transformers meeting the requirements of BS 7821-2.1
出版:British Standards Institution

专家解读视频
Specifies the design and constructional requirements for cable boxes of Type 1 suitable for either indoor or outdoor operation.
© British Standards Institution 2013
HD 428.2.2:1997 - Identical