Contact system used for double-breakpoint plastic casing breaker

A molded case circuit breaker and contact system technology, which is applied in the direction of circuit breaker contacts, circuit breaker components, etc., can solve problems such as fallback, high energy, and arc re-ignition

Inactive Publication Date: 2012-05-09
SHANGHAI JINGYI ELECTRICAL APPARATUS FACTORY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, due to structural reasons, most low-voltage plastic case circuit breakers (double breakpoints) tend to fall back when the moving contacts are disassembled under the action of electric repulsion when the short circuit is broken, causing the arc to reignite, and even worse. Those who make the dynamic and static contacts close again and welded are very harmful.
At the same time, due to the action of electric repulsion, the moving contact opens rapidly, and the energy is large, which will have a severe impact on the casing of the circuit breaker, causing damage to the casing

Method used

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  • Contact system used for double-breakpoint plastic casing breaker
  • Contact system used for double-breakpoint plastic casing breaker
  • Contact system used for double-breakpoint plastic casing breaker

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Embodiment Construction

[0020] see figure 1 , figure 2 , the present invention is used for the contact system of the plastic case circuit breaker with double breaking points, including the moving contact 1, the first static contact 2, the second static contact 3 and the rotating shaft 4, as well as two fixed shaft pins 5, two sliding shaft pins 6 and two springs 7. The shaft is functionally connected to the circuit breaker operating mechanism.

[0021] Cooperate see Figure 4 , Figure 5 , the rotating shaft 4 in the present invention is provided with a radially penetrating slotted hole 41 , and two concave arc-shaped steps 42 are symmetrically provided in the slotted hole 41 .

[0022] Cooperate see image 3 , the moving contact 1 in the present invention is installed in the rotating shaft 4 through the slotted hole 41 of the rotating shaft 4, and the two sides of the moving contact 1 are symmetrically provided with two convex arc-shaped sliding surfaces 11, and the two concaves in the slotted...

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PUM

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Abstract

The invention relates to a contact system used for a double-breakpoint plastic casing breaker. The contact system comprises a moving contact, a first static contact, a second static contact, a rotation shaft, two fixed shaft pins, two sliding shaft pins and two springs. The rotation shaft is provided with a radially through model trough hole and two concave arc-shaped steps are symmetrically arranged in the model trough hole. The moving contact penetrates through the model trough hole to be arranged, two concave arc-shaped sliding faces are symmetrically arranged at both sides of the moving contact, and the two concave arc-shaped sliding faces are corresponding to the two concave arc-shaped steps in the model trough hole. With the adoption of the contact system of the invention, the moving contact does not have falling phenomenon during short circuit breaking, and energy generated by fast opened moving contact can not have impact on an outer casing of the breaker.

Description

technical field [0001] The invention relates to an electrical component, in particular to a contact system for a double break point molded case circuit breaker. Background technique [0002] At present, due to structural reasons, most low-voltage plastic case circuit breakers (double breakpoints) tend to fall back when the moving contacts are disassembled under the action of electric repulsion when the short circuit is broken, causing the arc to reignite, and even worse. Otherwise, the moving and static contacts are reclosed and welded, which is very harmful. At the same time, due to the action of electric repulsion, the moving contact opens rapidly, and the energy is relatively large, which will have a severe impact on the casing of the circuit breaker, causing damage to the casing. Contents of the invention [0003] The object of the present invention is to solve the above problems and provide a contact system with a new structure for a double break point molded case ci...

Claims

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Application Information

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IPC IPC(8): H01H73/04
Inventor 陈萍杨文学秦丽张维
Owner SHANGHAI JINGYI ELECTRICAL APPARATUS FACTORY CO LTD
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