SIMOSEC air insulated SF6 ring main unit is manufactured by SUNTEN cooperating with SIEMENS, Germany. Three positions SF6 switch is core component that imported from SIEMENS. All welded air tank, magnetism coupling pressure indicator and module design are the guarantee of excellent performance, flexible combination and satisfaction to different market requirements. The RMU is important switching equipment for radial feeder and terminal feeder and widely used in substation, industrial and mining enterprises, high rising building, airport, hospital, marketplace, residence blocks and package substation. Product Type: SIMOSEC Main Technical Parameters: Siemens technolgoy, imported core part ( stainless steel air cabinet in one cabinet), SF6 air hermetically insulated, configured with vacuum circuit breaker. Main Service Range: user?s distribution substation, package substation.