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Buffer device of low-voltage circuit breaker

A technology of low-voltage circuit breakers and buffer devices, applied in emergency protection devices, circuits, parts of protection switches, etc., can solve the problem of large springback of moving contacts, reduce the springback distance of opening, installation and disassembly handy effect

Inactive Publication Date: 2020-09-18
SHANGHAI ELECTRICGROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the springback of the moving contact is too large in the opening process of the existing circuit breaker

Method used

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  • Buffer device of low-voltage circuit breaker
  • Buffer device of low-voltage circuit breaker
  • Buffer device of low-voltage circuit breaker

Examples

Experimental program
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Effect test

Embodiment

[0024] This example is a buffer device for a low-voltage circuit breaker (hereinafter referred to as a circuit breaker). The buffer link and the buffer are connected through the main shaft of the mechanism, so as to reduce the rebound of the moving contact when the circuit breaker is opened, and more effectively realize the Anti-rebound, improve service life.

[0025] The specific technical scheme to achieve the above purpose is: two buffer devices are respectively arranged on both sides of the low-voltage circuit breaker, such as figure 2 shown. The buffer device includes a buffer base 1, a buffer 2, a buffer link 3 and other components, wherein the buffer base 1 can be a part of the arc extinguishing chamber shell 4 of the circuit breaker, or a part of the fixed bottom plate 5 of the circuit breaker; buffer The device 2 is fixed by the pressure plate 6 (such as image 3 ) On the buffer base 1, the buffer 2 can have various structural forms, including but not limited to sp...

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Abstract

The invention discloses a buffer device of a low-voltage circuit breaker, and the buffer device is characterized in that the buffer device comprises a buffer base, a buffer and a buffer connecting rod, and the buffer base is arranged in the circuit breaker; the buffer is fixed on the buffer base; the buffer connecting rod is connected with a main shaft of the circuit breaker, the main shaft is connected with a moving contact of the circuit breaker, the main shaft drives the buffer connecting rod to rotate when the circuit breaker is switched off, the buffer is arranged on a rotating path of the buffer connecting rod, and the buffer connecting rod impacts the buffer to realize an anti-rebound effect. The beneficial effects of the invention are that the opening springback distance of the moving contact of the circuit breaker is greatly reduced through selecting different types of buffers; the service life of the buffer is much longer than that of the existing breaker buffer; the buffer is separated from the circuit breaker mechanism body and is convenient to assemble and disassemble.

Description

technical field [0001] The invention relates to a buffer device of a low-voltage circuit breaker, belonging to the technical field of electrical equipment. Background technique [0002] With the increase of electricity consumption and the emergence of more and more high-power loads, the requirements of various indicators of low-voltage circuit breakers are constantly improving. index. At present, most of the low-voltage circuit breaker industry adopts the method of increasing the spring force value of the moving contact to ensure that the contact will not be repelled when the short-term withstand current occurs. Matching with this, in order to ensure the breaking capacity, it is necessary to increase the opening force of the system, so as to speed up the opening speed of the moving contact. Most of the circuit breaker mechanisms are made of rigid materials. If the circuit breaker does not have an anti-rebound device or the device does not work, the rebound amount of the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/12
CPCH01H71/121
Inventor 付志超张海根程少勇
Owner SHANGHAI ELECTRICGROUP CORP
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