Contactor device fo circuit breaker
AssigneeFuji Electric Co., Ltd.
InventorKiyoshi Kandatsu
Life of this patent
Estimating the term…
Abstract
A contactor device of a circuit breaker has a movable contactor to be raised or opened upon the occurrence of a short circuit current. One end portion of the movable contactor is bifurcated to form parallel claw members that engage a rotatable trip latch. When the movable contactor is raised due to a magnetic repelling force generated in the movable contactor and a fixed contactor during a short-circuit condition, the claw portions of the movable contactor are deformed due to a magnetic attractive force and are disengaged from the trip latch. The rotation of the movable contactor is restricted and it returns to the original positional relationship in which the claw members are engaged with the trip latch.
Claims8
A contactor device for a circuit breaker comprising:
- a first contactor having a first contact point;
- a holder;
- a movable contactor having a first end and a second end, said second end being bifurcated to form a first claw member and a second claw member parallel to said first claw member, said first and second claw members being rotatably mounted on said holder such that said movable contactor is rotatable between a closed contact position and an open contact position;
- trip latch means for supporting said first and second claw members to maintain said movable contactor in said closed contact position when the contactor device is not subject o a short circuit current;
- and
- a second contact point on said first end of said movable contactor for contacting said first contact point to enable electrical current to flow between said first contactor and said movable contactor, said current flowing through said first contactor and said first claw member and said second claw member establishing a first magnetic field between said first claw member and said second claw member and a second magnetic field between said first contactor and said movable contactor, said first magnetic field causing said first and second claw members to be deformed in response to a short circuit current to disengage said first and second claw members from said trip latch means and said second magnetic field for repelling said movable contactor from said first contactor in response to a short circuit current to rotate said movable contactor to said open contact position.
Dependencies are inferred from the claim text.