Patent ID: 8698034
Filing Date: 2014-04-15
Classification: H01H

Abstract:
1. A vacuum interrupter comprising: a dielectric casing; a plurality of flanges each configured to seal one end of the dielectric casing; a stationary electrode fixed within the dielectric casing; a movable electrode located such that it faces the stationary electrode and is slidable with respect to the dielectric casing; a main shield fixed to the dielectric casing in order to house the stationary electrode and the movable electrode; a stationary-side sub shield fixed to the dielectric casing and located at one side of the main shield in an axial direction; and a movable-side sub shield facing the stationary-side sub shield and fixed to the dielectric casing, wherein a curved portion is formed at an end of at least the main shield, the stationary-side sub shield or the movable-side sub shield, wherein an end of each of the stationary-side sub shield and the movable-side sub shield is inserted into the main shield in order to overlap the main shield by a predetermined length, and wherein each of the stationary-side sub shield and the movable-side sub shield comprises: a middle portion fixed to the dielectric casing; a first end portion inserted into the main shield and having a diameter that is smaller than a diameter of the middle portion; and a second end portion located opposite to the first end portion and having a diameter that is greater than a diameter of the first end portion and smaller than the diameter of the middle portion.