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.

• 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.