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Contact system of a circuit breaker

A contact system and circuit breaker technology, which is applied in the direction of circuit breaker contacts and circuit breaker parts, etc., can solve the problems of poor reliability, unfavorable miniaturization design of the circuit breaker contact system, etc., and achieve high reliability and save movement space , Enhance the effect of arc extinguishing ability

Active Publication Date: 2016-08-31
DELIXI ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the circuit breaker contact system in the prior art is not conducive to product miniaturization design, and the reliability is relatively poor, thereby providing a circuit breaker contact system with a compact structure and good reliability

Method used

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  • Contact system of a circuit breaker
  • Contact system of a circuit breaker
  • Contact system of a circuit breaker

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0027] Such as figure 1 and figure 2 Shown is a preferred embodiment of the contact system of the circuit breaker of the present invention.

[0028] In this embodiment, the contact system is applied to a current-limiting molded case circuit breaker, the contact system is arranged inside the circuit breaker, and the contact system includes a moving contact 1 and a static contact 8. The static contact 8 is installed on the base 7 of the circuit breaker.

[0029] The moving contact 1 includes an extending end 11 and a connecting end 12, the extending end 11 can cooperate with the static contact 8, and the connecting end 12 is rotatably arranged on the rotating shaft through the moving contact positioning shaft 2 3, the rotating shaft 3 is set on the base 7 and controlled by the operating mechanism of the circuit breaker. The rotating shaft 3 is also provided with a contact spring 5 for applying elastic force to the moving contact 1 , the contact spring 5 is a torsion spring, ...

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Abstract

A contact system of a circuit breaker, which is arranged inside the circuit breaker, includes a moving contact and a static contact, the protruding end of the moving contact can cooperate with the static contact, and the moving contact The connecting end is rotatably arranged on the rotating shaft through the moving contact positioning shaft; the connecting end is provided with an auxiliary shaft, the auxiliary shaft is located below the moving contact positioning shaft and the axis center of the auxiliary shaft and the moving contact The line connecting the center of the contact positioning shaft and the protruding end of the moving contact forms an obtuse angle, the auxiliary shaft is prism-shaped and its two ends protrude from the moving contact; the first side of the contact spring The arm is limited by the rotating shaft, the second side arm is blocked by the part of the auxiliary shaft protruding from the movable contact, and the contact spring is compressed between the auxiliary shaft and the rotating shaft, and at In the closed state, the second side arm is in contact with the edge of the auxiliary shaft protruding from the movable contact. The contact system of the invention has compact structure and good reliability, can effectively prevent the contacts from falling back, and improve the breaking capacity of the circuit breaker.

Description

technical field [0001] The invention relates to the field of low-voltage electrical technology, in particular to a contact system of a circuit breaker. Background technique [0002] In the prior art, the moving contact and the static contact of the circuit breaker are usually designed to have opposite current directions. When there is a short circuit and a large current in the circuit, an electric repulsion force will be generated between the moving and static contacts to make the moving contact disconnect. direction movement, at the same time, an arc will be generated between the dynamic and static contacts; as the moving contacts move towards the disconnection direction, the electric repulsion between the dynamic and static contacts will gradually decrease, when the electric repulsion is not enough to overcome the elastic force of the contact spring , the moving contact will fall back under the action of the contact spring force and this may cause secondary arcing. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H73/04
Inventor 刘超李慧瑾李江龙
Owner DELIXI ELECTRIC
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