Alpha RMU unit type SF6 RMU with SF6 load switch as main switch, for whole cabinet is suitable for electric distribution automation and compact also expandable metal close switchgear. It characters in its simple structure, flexible operation, reliable interlocking and convenient installation etc., which can provide the satisfactory technical projects both for different application occasions and users. Alpha RMU unit type can completely meet the requirement of continuously variable market. It can take self-produced ALBS-12-24 load break switch; also according to user’s demand can be assembled with the vacuum circuit breaker with permanent magnetic mechanism with our VL type vacuum circuit breaker. Operational methods for the main switch inside ring main unit can be either manual or electric power driven.