| 标准编号 | BS 7821-1:1995 |
| 标准名称 | Three phase oil-immersed distribution transformers, 50 Hz, from 50 to 2500 kVA with highest voltage for equipment not exceeding 36 kV. General requirements and requirements for transformers with highest voltage for equipment not exceeding 24 kV |
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| 废止日期 | 2007-07-31 |
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