Miniature circuit breaker arc extinguishing system and miniature circuit breaker with same
A small circuit breaker and arc extinguishing technology, applied in the direction of circuit breaker parts, circuits, electrical components, etc., can solve the problems of stagnant arc energy and inability to dissipate efficiently
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Embodiment 1
[0033] Such as figure 2 As shown, an arc extinguishing system for a small circuit breaker provided in this embodiment includes: a static contact 1 , a moving contact 2 and a lower running arc 3 installed in the housing.
[0034] The static contact 1 is provided with a hook-shaped arc-leading foot 5 , a vertical portion 6 provided with a static contact, and a first inclined portion 7 connecting the arc-leading foot 5 and the vertical portion 6 . The arc-leading pin 5 is an arc or a "V" shape. The arc-leading foot 5 in this embodiment is arc-shaped. The first inclined portion 7 is inclined in the direction away from the static contact, and the angle between the first inclined portion 7 and the vertical portion 6 ranges from 155° to 175°. In this embodiment, the first inclined portion 7 and the vertical portion 6 The angle between the vertical parts 6 is 175°.
[0035] The lower running arc 3 is provided with a horizontal portion 8, an oblique portion, a second oblique portio...
Embodiment 2
[0042] This embodiment provides a miniature circuit breaker with the miniature circuit breaker arc extinguishing system described in Embodiment 1. The housing of the miniature circuit breaker arc extinguishing system is closed so that the static contact, the moving contact and the lower running arc are in the Work in enclosed spaces. When the miniature circuit breaker is working, it can achieve rapid arc ignition and arc extinction, reduce the formation of eddy currents, enhance the convective dissipation of arc energy, and the efficient convective dissipation makes the arc quickly cool and extinguish, thereby improving the electrical life of DC products. The critical current breaking capability makes the product performance more reliable.
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Abstract
Description
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Application Information
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