With the continuous development of the urban power grid, the overhead lines in the city are gradually replaced by cable lines.As medium voltage distribution switchgear in the construction of ring network power supply, Ring Main Unit is the main equipment for cable network protection and segmentation isolation. Ring Main Unit is widely used in the urban power grid with its safe, reliable performance, compact and beautiful appearance, excellent cost performance. The following series  of Ring Main Unit products are power distribution solutions  for various industrial and commercial users, which are manufactured by Dingsheng Group based on high safety and  reliability