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Circuit breaker contact protection device

A protection device and circuit breaker technology, which is applied in the directions of circuit breaker contacts, circuit breaker components, etc., to increase the number of interruptions, reduce the degree of burns, and improve the rated operation index.

Active Publication Date: 2017-04-05
SHANGHAI LIANGXIN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a circuit breaker contact protection device for the technical defects that the existing various contact protection schemes cannot avoid arc re-ignition and burnt contacts in the high-voltage state. , automatically cut off the arc, and realize the purpose of protecting the contacts of the circuit breaker

Method used

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Embodiment

[0025] as attached figure 1 As shown, a circuit breaker contact protection device, which includes a moving contact 1, an arc cutting cover 2 is hung on the moving contact 1, and the arc cutting cover 2 can rotate and cut off the circuit breaker when the circuit breaker is disconnected. the arc.

[0026] The side of the moving contact 1 is provided with an installation shaft 3, the end of the arc cutting cover 2 is hung on the shaft end of the installation shaft 3, the moving contact 1 is installed on the moving contact support 4, and the arc cutting cover 2 can Swing back and forth around the installation shaft 3, and the two ends of the swing of the arc cutting cover 2 are limited by the moving contact support 4.

[0027] as attached Figure 8 As shown, the arc cutting cover 2 is a U-shaped arc cutting cover, and the two ends of the U-shaped arc cutting cover 2 are hung on the shaft end of the installation shaft 3 .

[0028] During the swinging process, the arc cutting cov...

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Abstract

The invention discloses a circuit breaker contact protection device, which comprises a moving contact (1), and is characterized in that an arc cutting cover (2) is arranged on the moving contact (1) in a hanging mode; and the arc cutting cover (2) can rotate, and during the rotation process, arcs when the circuit breaker is broken are cut off. According to the movement features of opening and closing of the moving contact, the gravity of the arc cutting cover itself is used delicately to double the arc extinguishing speed, the arc residence time is extremely short, once the arcs are generated, the arcs can be cut off by the arc cutting cover, the arc cutting cover performs cutting tightly close to the arc roots of the moving contact, and a high temperature area is avoided; and arc cutting and protection are completed, the expected arc energy is greatly reduced, the recovery voltage can be effectively improved, the contact burning degree is reduced, the breaking times are increased, and the rated operation indexes of products are enhanced.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to a circuit breaker contact protection device, which can effectively reduce the burn degree of the contacts and realize the purpose of protecting the contacts. Background technique [0002] Circuit breakers are an important part of power distribution appliances, mainly used in industrial low-voltage power systems, used to connect and break the current in the grid circuit and protect the circuit and power supply equipment from overload, undervoltage, short circuit, single-phase grounding and other faults hazards. [0003] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Low-voltage circuit breaker, also known as automatic switch, commonly known as "air switch", also refers to low-voltage circuit breaker. It is an electrical appliance that not only has the function ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/04H01H73/18
CPCH01H73/04H01H73/18H01H9/32
Inventor 付春秋晏国云佘定辉刘德林谢满贞
Owner SHANGHAI LIANGXIN ELECTRICAL
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