Vacuum circuit breaker working principle is: when the dynamic and static contact in the operating mechanism of the sub-gate, the contact between the arc, the contact surface at high temperature volatilization of steam, because the contact design for the special shape, the current Through the production of a magnetic field, the arc in the magnetic field under the tangential direction along the contact surface of the rapid movement of the metal cylinder (shield) on the condensation of part of the metal vapor, the arc in the natural zero off when the Medium strength and quickly recovered.
