公开(公告)号：US20250029800A1

公开(公告)日：2025-01-23

申请号：US18715441

申请日：2022-12-01

Applicant: MEIDENSHA CORPORATION

Inventor： Hideaki FUKUDA ,  Noboru SAKURAI ,  Hiroki NARITA

IPC: H01H33/664 ,  H01H33/662

Abstract: An arc shield with which a tubular body of a vacuum container is provided includes a tubular arc-shield body portion interposed between a fixed-side insulating portion and a movable-side insulating portion; a tubular arc shield fixed-side extension portion extending from the arc-shield body portion on the axially fixed side along the inner peripheral side of the fixed-side insulating portion; and a tubular arc shield movable-side extension portion extending from the arc-shield body portion on the axially movable side along the inner peripheral side of the movable-side insulating portion. Further, at least one of the arc shield fixed-side extension portion and the arc shield movable-side extension portion is shaped such that the portion becomes smaller in diameter in a stepped manner in the direction of extension thereof.