Patent Number: 8,822,862

Title: DC breaker

Abstract: It comprises fixed terminal 42 provided with fixed contact 42a; movable armature 44 provided with movable contact 45; shaft 44 inserted in the movable armature; sealing container 40 holding the fixed terminal and housing the movable armature and the shaft therein in hermetically-sealed state; contact pressure spring 410 giving contact pressure between the movable contact and the fixed contact; return spring 411 urging the shaft to move away from the fixed contact; operation handle 1; shaft pressing piece 56 pressing, in accordance with the operation of the operation handle, the other end of main body of the shaft to move the shaft closer to the fixed contact; and electromagnetic tripping block 6 which makes the movable/fixed contacts open by taking the pressing means away from the other end of the main body of the shaft in case that anomalous current flows through the movable/fixed contacts when they are contacted.

Inventors: Cyuzawa; Takaaki (Hirakata, JP)

Assignee: Panasonic Corporation

International Classification: H01H 1/66 (20060101); H01H 73/18 (20060101)

Expiration Date: 9/02/12018