Movable static contact structure for plastic-shell circuit breaker

A technology for molded case circuit breakers, dynamic and static contacts, applied in the direction of circuit breaker contacts, circuit breaker components, etc., can solve the problems of copper braided wires not being well insulated, protection is not in place, fusion welding, etc., to achieve static contacts Reliable structure, high machining accuracy and reduced parts
CN102184812BActive Publication Date: 2013-04-24EATON HUINENG LOW-VOLTAGE ELECTRICAL (JIANGSU) CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
EATON HUINENG LOW-VOLTAGE ELECTRICAL (JIANGSU) CO LTD
Publication Date
2013-04-24

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Abstract

The invention discloses a movable static contact structure for a plastic-shell circuit breaker. The back parts of a static contact plastic piece and a static contact are connected with a plastic bracket through a static contact rotating shaft; the plastic bracket is fixedly connected with a connecting bar; a spring is arranged between the back part of the static contact and the plastic bracket; acopper braided wire is connected between the connecting bar and the static contact; the back part of the static contact plastic piece is provided with two fan-shaped bosses which have fan-shaped sections and are bilaterally symmetric to the static contact; first through holes formed in the middles of the two fan-shaped bosses are coaxial with a third through hole formed on the back part of the static contact; the static contact rotating shaft passes through the first through holes and the third through hole, and the two ends of the static contact rotating shaft are connected with the plastic bracket; a first cavity is formed at the middle position of the plastic bracket; the back part of the plastic bracket is provided with a second cavity; the copper braided wire is arranged in the firstcavity; and the spring and the back parts of the static contact plastic piece and the static contact are accommodated in the second cavity. In the breaking process of a circuit breaker, electric arcsare prevented from burning the contact and metal particles produced by an arc chute are prevented from sputtering towards the back part of the static contact, so that the static contact structure is more reliable.
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Description

technical field

[0001] The invention relates to a molded case circuit breaker, in particular to a movable and static contact structure of the molded case circuit breaker, and belongs to the technical field of low-voltage electrics. Background technique

[0002] In the molded case circuit breaker, the static contact is the key component inside the circuit breaker. The static contact structure in the existing molded case circuit breaker is divided into two types: fixed static contact and movable static contact. Among them, when the molded case circuit breaker with fixed static contacts is broken, it only relies on the moving contacts to separate, and the speed of separation between the moving contacts and the static contacts is slow, and the arc cannot be extinguished quickly, resulting in low breaking capacity of the switch. , the circuit breaker is in danger of burning out. The movable and static contact structure can increase the distance between the contacts, so that the ...

Claims

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