Shandong ChinSun Electrical Equipment Co., Ltd. was founded by experts of China Electric Power Research Institute，two of them had earned PhD degree abroad. ChinSun has been producing dry-type wall bushing & transformer bushing since 2001. The current FBRG series transformer bushings are based on the Resin Impregnating technology developed by the company in 2003. The technology has been continuously researched and improved over this time.
In particular, we have just obtained the national invention patent for RIS (Resin Impregnated Synthetic) technology. As the latest technology in the high-voltage bushing industry, RIS technology will become an alternative to RIP technology. RIS is the right solution for a paperless bushing. It is more reliable, easier to maintain.
The following patent certificate is the RIS patent certificate issued to us by the State Intellectual Property Office of China.