Kyn28-12 armored movable ac metal closed switchgear is a complete set of distribution equipment for 12kV three-phase AC 50Hz single bus, double bus and single bus section system. Mainly used in power plants, small and medium-sized generator sets, industrial and mining enterprises distribution, power system of the secondary substation, power transmission and large high voltage motor starting. For the purpose of control, protection and monitoring. The switch cabinet has perfect interlock function of "five defenses".