Title:
【発明の名称】回路遮断器の引外し装置
Document Type and Number:
Japanese Patent JP2954936
Kind Code:
B1
Abstract:
A trip device of a main circuit breaker is provided which causes only a branch circuit breaker to be set into a tripped state when an abnormal current occurs at a load of the branch circuit breaker while keeping a closed state of the main circuit breaker. The trip device of the circuit breaker has a structure including a trip latch mechanism (15) for opening switching contacts, a stationary core (18), a movable core (19) which is attracted to the stationary core (18) to release the latch mechanism (15) of a trip lever, an operating pin (22) for interrupting movement of the movable core (19) while the movable core (19) is attracted, an operating spring (23) charged with force when the movable core (19) is attracted, and an inertia roller (21) holding the operating pin (22), kicked when the operating spring (23) discharges the force, and moved to a position which does not interrupt movement of the movable core (19). Accordingly, this structure allows a selective tripping system to be implemented simply with small size and low cost.
Inventors:
KANEKO SHOZO
YURA TAKESHI
YURA TAKESHI
Application Number:
JP22958998A
Publication Date:
September 27, 1999
Filing Date:
August 14, 1998
Export Citation:
Assignee:
TERASAKI DENKI SANGYO KK
International Classes:
H01H71/24; H01H71/10; H01H71/44; (IPC1-7): H01H71/24
Attorney, Agent or Firm:
Fukami Hisaro (3 outside)