Patent ID: 8519812

Claim:
A vacuum interrupter in a vacuum circuit breaker, the vacuum interrupter comprising: a sealed insulated container; a stationary electrode located at an inner portion of the insulated container; a movable electrode facing the stationary electrode and configured to slide against the insulated container in order to generate a magnetic field between a facing surface of the stationary electrode and a facing surface of the movable electrode; and an attraction member permanently fixed to an outer circumferential surface of the insulated container adjacent to the facing surface of the stationary electrode and the facing surface of the movable electrode and configured to attract a radial magnetic field generated between the stationary electrode and movable electrode in a radial direction; and a support portion formed in a stepped manner on the outer circumferential surface of the insulated container in order to support the attraction member inserted into the support portion in an axial direction, wherein the axial direction is a moving direction of the movable electrode.