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Low-voltage arc quenching system based on wall erosion to improve pneumatic repellent force and break performance

A device wall, low-voltage technology is applied in the field of devices that use gas-producing materials to improve the pneumatic repulsion and breaking performance of low-voltage electrical appliances, and can solve the problem of not effectively improving the current-limiting performance of low-voltage circuit breakers, unfavorable product miniaturization and reliability, and increasing Processing difficulty and other problems, to achieve the effect of suppressing the phenomenon of contact falling, preventing contact falling and welding, and improving the breaking performance

Active Publication Date: 2006-11-22
XI AN JIAOTONG UNIV
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Problems solved by technology

Therefore, in principle, electrodynamic repulsion cannot effectively improve the current limiting performance of low-voltage circuit breakers
[0007] 2) The above-mentioned ferromagnetic system adopted by Zhou has a relatively novel starting point, but its structure is relatively complicated, which increases the difficulty of fixing and processing, and is not conducive to the miniaturization and reliability of the product

Method used

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  • Low-voltage arc quenching system based on wall erosion to improve pneumatic repellent force and break performance
  • Low-voltage arc quenching system based on wall erosion to improve pneumatic repellent force and break performance
  • Low-voltage arc quenching system based on wall erosion to improve pneumatic repellent force and break performance

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the drawings.

[0019] See figure 1 , 2. The present invention includes an arc ignition plate 2 and a static conductive system 3 connected with the arc ignition plate 2. A static contact 1 is fixed on the upper end surface of the arc ignition plate 2, and the upper end of the arc ignition plate 2 is also provided There is an arc extinguishing chamber 6, a movable conductive rod 5 matched with the static contact 1 is provided on one side of the arc extinguishing chamber 6, and the movable conductive rod 5 is fixed by a rotating shaft 7, and a movable conductive rod 5 is also provided at the front end of the movable conductive rod 5. The contact 4 is provided with a gas generating material layer 8 made of MMA, POM, PBT or nylon material around the static contact 1 and on the arc-igniting plate 2 respectively.

[0020] See figure 1 , 2. The present invention includes a static conductive circu...

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Abstract

The invention discloses a low-pressure arc extinguishing system to improve air-actuated repulsion and switching system based on wall erosion, which consists of static conductive loop and adjacent end tab, the static contact is welded on the static conductive loop; the arc extinguish chamber is set on the top of end tab; the movable contact is welded on the movable conducting bar, which revolves around rotary shaft; the gas-producing material layer is set on the peripheral of static contact and end tab separately, which avoids falling and fusion welding for contact.

Description

Technical field [0001] The invention relates to a method for improving the performance of low-voltage electrical appliances, in particular to a device for improving the aerodynamic repulsion and breaking performance of low-voltage electrical appliances by using gas producing materials. Background technique [0002] Low-voltage electrical appliances play an irreplaceable control and protection function in the power system. Low-voltage circuit breakers and contactors are the two main categories of products. [0003] For a long time, people have designed various structures of contact conductive circuit systems, such as lower wire entry, upper wire entry, U-shaped motor slot, and installation of iron clips on the moving conductive rod to increase the effect on the moving contact. The electric repulsion force can improve the current limiting performance of the low-voltage circuit breaker. However, through research, it is found that about 70% of the electrodynamic repulsion force depen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/30H01H9/34
Inventor 李兴文陈德桂
Owner XI AN JIAOTONG UNIV
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