Title:
UNDERVOLTAGE TRIPPING DEVICE FOR CIRCUIT-BREAKER
Document Type and Number:
Japanese Patent JP3194716
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent a nonconformities such as an accident by closing in non- voltage state by engaging the engaging part of a hook with a lock bar so that the mounting of a cover is incapable of being performed, in the mounting of the cover in the state where a movable core is attracted, after the removable of the cover.
SOLUTION: A cover 18 is removed, and a movable core is pushed up with hands and attracted to a fixed core to perform a maintenance and inspection work. At this time, an operating lever continues the returning rotation against the working force of a third spring by the returning rotating force by the working force of a second spring, even after the contact edge of a hook 14 makes contact with a lock bar 12, and the hook 15 separates from the shaft and relatively rotates clockwise on the operating lever. The contact point between the hook 15 and the lock bar 12 is moved on the contact edge by this rotation, the contact point separates from the contact edge over the top part, relatively rotates counterclockwise through the action of the third spring, and fits in the inside of U-shape of the hook 15. Thus, the locking engaging part 15b of the hook 15 is engaged with the lock bar 12, so that the mounting of the cover 18 is becomes incapable of conducted.
Inventors:
Masao Horikawa
Application Number:
JP3049198A
Publication Date:
August 06, 2001
Filing Date:
January 28, 1998
Export Citation:
Assignee:
Terasaki Electric Industry Co., Ltd.
International Classes:
H01H71/62; H01H83/12; (IPC1-7): H01H83/12; H01H71/62
Domestic Patent References:
| JP52149365A | ||||
| JP6187438U |