ZN28-12 series vacuum circuit breaker is rated voltage 12kV, three-phase AC 50Hz indoor high voltage switchgear. The products meet GB1984-89 standard, the product overall structure of switch body integrated with the operating mechanism installed on the form. Applicable to all types of fixed type switchgear, such as GG1A (Z), XGN2A10 (Z) and so on.

It can be equipped with the CD17 DC electromagnetic actuator and CT19A type spring energy storage actuator.