High Voltage Indoor 50Hz Vacuum Circuit Breaker

Introducing the ZN28-12 series high-voltage indoor vacuum circuit breaker, a state-of-the-art solution meticulously engineered to optimize electrical performance and ensure efficient power distribution. This cutting-edge circuit breaker comes equipped with a middle-sealed longitudinal magnetic field vacuum arc extinguisher and a sophisticated operating mechanism, providing a guarantee of reliable and safe operations.

The innovative front and rear layout of the operating mechanism and vacuum arc extinguishing chamber not only simplifies control but also enhances functionality. By connecting the operating mechanism to the movable conducting rod of the vacuum arc-extinguishing chamber using an insulating pull rod, it effectively drives the movable contacts of the chamber to execute seamless opening and closing movements in accordance with specified mechanical parameters. This precise movement enables the breaker to effectively break short-circuit currents while simultaneously improving the mechanical longevity of the arc extinguishing chamber.

To further augment the performance of the circuit breaker during operation, an auxiliary guide device has been implemented on the upper bracket of the fixed arc extinguishing chamber. This pioneering device ensures that the moving contacts remain impeccably aligned throughout the opening and closing process, thereby precluding any potential disruptions and significantly enhancing the overall efficiency of the breaker. This remarkable innovation not only improves the short-circuit current breaking capability but also extends the lifespan of the arc extinguishing chamber, ensuring sustained and dependable performance.

A distinctive feature of the ZN28-12 series is its centrally enclosed longitudinal magnetic field vacuum arc extinguishing chamber. When the moving and static contacts open while under load, the vacuum arc initiates within the contact gap. However, the arc is rapidly extinguished as it reaches the zero crossing. The unique structure of the contact produces a significant longitudinal magnetic field during arcing. This magnetic field evenly distributes the arc over the contact surface, resulting in a remarkably low arc voltage.

This innovative design enables the circuit breaker to achieve a high arc voltage dielectric strength recovery speed. This exceptional characteristic significantly reduces the arc energy and electrical corrosion rate, ultimately improving the short-circuit current breaking capability and enhancing the overall lifespan of the circuit breaker. Its unparalleled performance contributes to a more dependable and efficient power distribution system.

The ZN28-12 series high-voltage indoor vacuum circuit breaker represents a reliable and efficient solution for a wide range of electrical systems. With its advanced features and superior performance, this circuit breaker plays a vital role in upholding the stability and safety of power distribution networks. Place your trust in the ZN28-12 series to deliver exceptional results for all your electrical needs.