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Grating arc-extinguishing chamber with gas producing lamination of insulation material

A technology of arc extinguishing chamber and grid, which is applied in the field of grid arc extinguishing chamber, can solve problems such as prolonging the arcing time of current-limiting circuit breakers, and achieve the effect of suppressing the breakdown phenomenon behind the arc

Inactive Publication Date: 2007-01-31
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the traditional grid arc extinguishing chamber, when the arc enters the grid, due to the sudden increase of the arc voltage and the high temperature in the rear area, that is, the arc track and the contact area, thermal breakdown in the rear area will occur, resulting in The arc runs out from the grid. This phenomenon is called arc back breakdown. This phenomenon occurs repeatedly, causing the arc voltage to drop many times, thus prolonging the arcing time of the current-limiting circuit breaker.

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  • Grating arc-extinguishing chamber with gas producing lamination of insulation material
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  • Grating arc-extinguishing chamber with gas producing lamination of insulation material

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings and the embodiments given by the inventor.

[0016] Referring to Fig. 1, according to the above technical scheme, the grid arc extinguishing chamber with insulating interlayer includes, the ferromagnetic grid arc extinguishing chamber 1 of the traditional circuit breaker; two adjacent ferromagnetic grid arc extinguishing chambers 1 Gas-generating insulating clips 3 made of polyoxymethylene or nylon are inserted between the grids 2, and the gas-generating insulating clips 3 are respectively placed on both sides of each layer of ferromagnetic grids 2. The ferromagnetic grid piece 2 is U-shaped, and the gas-producing insulating clips 3 placed on both sides of the ferromagnetic grid piece 2 form a gap 4 in the middle; the movable contact 5 moves between the gaps 4 . For a molded case circuit breaker, when the moving contact 5 leaves the static contact 6 and ignites ...

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Abstract

The invention discloses a grating arc extinguish chamber with gas production insulation material for various low-voltage breakers including the grating arc-extinguishing chamber of the conventional breakers, wherein gas production insulating clamping sheets are inserted between the two adjacent ferrum magnetic grids of the arc extinguish chamber, the plastic case breaker can accommodate the movable contact for movement therein, when the breaker is on or off, the electric arc contacts the insulation material sheet, gasifying it and producing hydrogen containing gas, the gas driving force will push the electric arc into the grating and extinguish it.

Description

technical field [0001] The invention belongs to the field of low-voltage electrical appliances, and relates to an arc-extinguishing chamber of a low-voltage circuit breaker, in particular to a grid plate arc-extinguishing chamber with a gas-generating insulating interlayer that can be widely used in low-voltage circuit breakers. Background technique [0002] The annual output value of low-voltage circuit breakers in my country has exceeded 10 billion yuan. With the increase of low-voltage power grid capacity, the demand is increasing rapidly. In particular, it is necessary to develop low-voltage circuit breakers with small size and high breaking performance. For circuit breakers, it is even more necessary to improve their current limiting characteristics. The traditional grid interrupter can no longer meet the requirements of breaking performance. [0003] The structure of the low-voltage circuit breaker is as follows: Figure 1a and Figure 1b As sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H73/18H01H9/32
Inventor 陈德桂袁海文
Owner XI AN JIAOTONG UNIV