ZN28(A)-12 series indoor high voltage vacuum circuit breakers (hereinafter referred to as "circuit breakers ") with rated voltage of 12KV.Three-phase AC S0Hz indoor high voltage switching equipment.The overall structure of circuit breaker is divided into two forms: switch body and operating mechanism - body installation and switch body and operating mechanism separate installation. The type structure is ZN28-12.The split type structure is ZN28A-12, suitable for all kinds of fixed switch cabinets, such as GG-1A(Z), XGN2A-10(Z), etc.

The circuit breaker can be equipped with CD17.CD10A TYPE DC electromagnetic operation mechanism or CT17.CTI9 type spring operation mechanism.

The circuit breaker conforms to GB 1984.2003 and DL/T 402-2007 and other technical standards.