KYN28-12 indoor AC high voltage metal armored movable switchgear (hereinafter referred to as "switchgear") " ）It is a complete set of power distribution device for 12kV three-phase AC SOHz single bus and single bus section system. It is mainly used for power transmission of 1000 power plants, small and medium-sized generators, power distribution of industrial and mining enterprises and institutions, power receiving and transmission of secondary substations of power system and starting of large high-voltage motors. It is used for control, protection and monitoring. The performance of the switchgear meets the requirements of GB3906, IEC298 and other standards It has the "five prevention" interlocking function of preventing the loaded push-pull handcart of the circuit breaker, preventing the wrong opening and closing of the circuit breaker, preventing the circuit breaker from closing when the grounding switch is in the closed position, preventing entering the charged compartment by mistake, and preventing the wrong closing of the grounding switch when it is charged.