Solid insulated ring main unit is expected to be widely applied

According to data, the annual sales volume of solid insulated ring main units in China has reached 20000 units. The main voltage level of the products is 12 kV, and 24 kV and 40.5 kV products have been launched. Solid insulated ring network cabinets have been applied in batches in more than ten regions of the country, including Anhui and Zhejiang provinces, Inner Mongolia, Beijing, Xizang, Shandong, Yunnan and other places. Recently, more than 70 sets were purchased in a bidding in Shenzhen
"In the course of several years of specific application, users have given a high evaluation of solid insulated ring network cabinets." Zhao Zhihong, chairman of the Professional Committee of Solid Insulated Ring Network Cabinets, said that at the end of 2011, the Lhasa Electric Power Bureau of Xizang, which is 4000 meters above sea level, pointed out that the solid insulated ring network cabinets used in its distribution stations have been operating stably for nearly 600 days, without an accident in a year and a half, creating a miracle of stable operation of ring network cabinets in cold regions
In addition to superior safety performance in high-altitude and cold regions, solid insulated ring main units also perform well in low-lying, humid, and strong sandstorm environments. Users such as Shandong Zibo Power Supply Company have recently given positive evaluations of the practical application of solid insulated ring main units, "Zhao Zhihong added
As part of the smart grid standard system, State Grid Corporation of China issued and implemented the enterprise standard "Technical Conditions for 12 kV Solid Insulated Ring Main Unit" (Q/GDW730-2012) in March 2012. According to incomplete statistics, approximately 12000-16500 solid insulated ring main units have been put into operation in distribution networks or other systems. From the development trend of stricter requirements for technical reliability and environmental protection, solid insulated ring main units have the potential to replace sulfur hexafluoride gas insulated ring main units