Description
VS1-12 vacuum circuit breaker, when the static contact is energized and opened under the action of the operating mechanism, a vacuum arc will be generated between the contacts. At the same time, due to the special structure of the contacts, an appropriate longitudinal magnetic field will be generated in the contact gap, which will cause the vacuum arc to remain diffuse, and make the arc evenly distributed on the contact surface to burn, maintaining a low arc voltage. When the current naturally passes through zero, the residual ions, electrons and metal vapors can be compounded or gathered on the contact surface and the shielding cover within a microsecond, and the dielectric insulation strength of the arc extinguishing chamber break will be quickly restored, so that the arc is extinguished, achieving the purpose of breaking. Since the vacuum circuit breaker uses a magnetic field to control the vacuum arc, it has a strong and stable ability to break current.
