Vacuum envelope including self-aligning end shield, vacuum interrupter, vacuum circuit interrupter and method including the same

摘要

A vacuum envelope is for a fixed contact mounted on a fixed electrode and a moveable contact mounted on a moveable electrode. The vacuum envelope includes a ceramic tube including a first open end and a second open end. A first end member is secured to the first open end. A second end member includes an inside surface and is secured to the second open end. A self-aligning shield includes a first end having an opening therein, a second open end, an intermediate portion disposed between the first end and the end shield second open end, and a flange portion disposed from the end shield second open end. The flange portion extends outwardly from the intermediate portion and generally back toward the first end. The flange portion includes an edge engaging the inside surface of the second end member, and is normally offset from the ceramic tube.