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US 5,329,264 AGranted
Circuit breaker with overcurrent tripping device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsHaruhisa Toda, Takafumi Kondo
Life of this patent
Estimating the term…
Abstract
An overcurrent tripping device which is included in a circuit breaker is constituted by a pre-assembly unit of a holder with a conductor, a fixed core for generating a magnetic attraction force responding to an overcurrent, and a bimetal warping responding to the temperature rise of the conductor, and an operation arm rotatably borne on the holder and having a moving core which is to be attracted to the fixed core by the magnetic attraction force.
Claims4
A circuit breaker with an overcurrent tripping device comprising:
- a conductor, an end thereof being connected to a moving contact mechanism and another end being connected to a terminal member;
- a fixed core provided in the vicinity of said conductor for generating a magnetic attraction force responding to a current value flowing on said conductor;
- a holder having a bimetal which contacts said conductor and warps responding to a current flowing on said conductor for driving a trip member;
- and
- an operation arm rotatably borne on said holder and having a moving core on an end thereof which opposes a face of said fixed core, an action part provided on another end of said arm for driving said trip member when said operation arm is rotated in a predetermined direction, and a stopper part for contacting said holder for maintaining a predetermined gap between said fixed core and said moving core when said stopper part contacts said holder.
2 more elements
A circuit breaker with overcurrent tripping device comprising:
- a conductor, an end thereof being connected to a moving contact mechanism and another end being connected to a terminal member;
- a fixed core provided in the vicinity of said conductor for generating a magnetic attraction force responding to a current value flowing on said conductor;
- a holder having a bimetal which contacts said conductor and warps responding to a current flowing on said conductor for driving a trip member;
- an operation arm rotatably borne on said holder and having a moving core on an end thereof which opposes a face of said fixed core, an action part provided on another end of said operation arm for driving said trip member when said operation arm is rotated in a predetermined direction, and a stopper part for contacting said holder for maintaining a predetermined gap between said fixed core and said moving core when said stopper part contacts said holder;
- and
- a spring provided between said holder and said operation arm for supplying a rotation force to said operation arm in a direction to separate said moving core from said fixed core.
3 more elements
Dependencies are inferred from the claim text.