Low voltage circuit breaker and its arc extinguishing chamber
A low-voltage circuit breaker and arc extinguishing chamber technology, which is applied to circuit breaker components, circuits, electrical components, etc., can solve the problem that the structure of the arc extinguishing chamber cannot provide higher arc voltage, the effective length of the grid is limited, and the lack of gas cooling effect and other problems, to avoid rapid drop and fall, to facilitate rapid extinguishment, and to enhance the effect of gas arc extinguishing
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Embodiment approach 1
[0074] Such as Figure 5 to Figure 29 As shown, the present invention provides an arc extinguishing chamber of a low-voltage circuit breaker, wherein the front of the arc extinguishing chamber is opposite to the moving contact, the rear of the arc extinguishing chamber is an arc outlet, and the arc extinguishing chamber of the low-voltage circuit breaker The arc extinguishing chamber includes at least two arc extinguishing grids 2 stacked up and down and at least one insulating block 1 capable of blocking arcs. Both sides of the arc extinguishing grid 2 are fixed by insulating brackets 4, and the insulating block 1 is set At the rear of the arc extinguishing chamber, the insulating block 1 is interlocked with the arc extinguishing grid 2 .
[0075] The arc extinguishing chamber of the low-voltage circuit breaker of the present invention also includes an arc striker 3, which is located above the arc extinguishing grid 2, and both sides of the arc striker 3 pass through the insu...
Embodiment approach 2
[0092] The present invention also provides a low-voltage circuit breaker, wherein the low-voltage circuit breaker includes the arc extinguishing chamber of the low-voltage circuit breaker described in the first embodiment, and the structure, working principle and beneficial effect of the arc extinguishing chamber are the same as those in the first embodiment , which will not be repeated here.
[0093] When the low-voltage circuit breaker and its arc extinguishing chamber of the present invention work, such as Figure 15 and Figure 16 As shown, when an arc is generated, the arc enters the arc extinguishing grid 2 of the arc extinguishing chamber under the action of the magnetic field and air blowing and moves from front to back, wherein the concentrated area of the arc enters through the narrow gap in the middle of the arc extinguishing grid 2 The arc extinguishing grid 2 and the insulating block 1 block the arc, so that the arc moves to both sides of the arc extinguishing ...
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