SM6 is an air-insulated ring main unit which is compliance with the standard of GB/IEC. SM6 units are widely used for the MV secondary distribution in MV/LV transformer substations in public distribution systems and MV consumer of distribution substations up to 24kV. 

◆ Compact design, easy installation, less maintenance, high reliability

◆ Flexible extensibility, high safety, rich of operational experience◆ Three position switch for natural interlocking, fail-safe interlock facility