Must arrange earthing poles in a side of the base or it around.The earhting resisance should be less than 4ohm to assure that the connent rain water from entering cable room.
英
美
释义
必须在组变基础一侧或四周布好接地极;接地电阻值应小于4欧姆;并应确保组合式变电站与接地极作可靠连接.
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