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Arc extinguishing device with integral arc isolating cover, and arc extinguishing method

A technology of arc extinguishing device and arc shield, which is applied in the direction of electrical components, electric switches, circuits, etc., can solve the problems of arc blowback circuit breaker, circuit breaker burnout, and limited arc extinguishing effect, so as to improve the service life and enhance the extinguishing effect. Effect of arc effect, rapid arc extinguishing effect of arc extinguishing effect

Pending Publication Date: 2019-06-21
BEIJING BEVONE ELECTRIC CO LTD
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Problems solved by technology

However, the existing arc extinguishing device mainly has the following problems: when breaking a large current, the arc extinguishing effect is limited, and it is easy to cause the arc to spray back into the circuit breaker, thereby causing the circuit breaker to burn out

Method used

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  • Arc extinguishing device with integral arc isolating cover, and arc extinguishing method
  • Arc extinguishing device with integral arc isolating cover, and arc extinguishing method
  • Arc extinguishing device with integral arc isolating cover, and arc extinguishing method

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[0034] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] The invention provides an arc extinguishing device with an integral arc extinguishing cover, which is used in a low-voltage circuit breaker, and can maximize the arc extinguishing capability of the arc extinguishing device when the volume of the arc extinguishing device is constant, and can Effectively prevent the arc backspray into the circuit breaker, thereby improving the breaking capacity and service life of the circuit breaker, improving the safety of use, and improving the reliability of power supply.

[0036] refer to Figure 1-Figure 3 as well as Figure...

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Abstract

The invention provides an arc extinguishing device with an integral arc isolating cover, and an arc extinguishing method. The arc extinguishing device with the integral arc isolating cover comprises an arc extinguishing chamber and the arc isolating cover; the arc extinguishing chamber comprises a left arc isolating plate, a right arc isolating plate and a plurality of arc extinguishing grids; thecutting arc parts of all the arc extinguishing grids are arranged in a fan shape by taking a rotating shaft as a circle center, namely, in a direction from bottom to top; an inclination angle of arranging the cutting arc parts of the arc extinguishing grids is gradually increased; and an axis extension line of each arc extinguishing grid passes through the rotating shaft. The advantages are as follows: the arc extinguishing grids with different lengths and different thicknesses are designed in the arc extinguishing chamber, and the arc extinguishing grids are designed to be arranged in a fanshape in a staggered mode, so that rapid arc extinguishing can be realized, and the arc extinguishing effect can be improved. The service life, the breaking capacity, the use safety and the power supply reliability of a circuit breaker are prolonged and improved.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to an arc extinguishing device with an integral arc shield and an arc extinguishing method. Background technique [0002] Circuit breakers are important control and protection appliances in power distribution appliances. They are mainly used in industrial low-voltage power systems to connect and break currents in grid circuits and protect circuits and power supply equipment from overload, undervoltage, short circuit, single The hazards of phase-to-ground faults. When the circuit breaker breaks the overload current, it is mainly completed by the arc extinguishing device. During the process of breaking the large current, an arc will be generated between the moving contact and the static contact. Since the arc is conductive, if it cannot be extinguished in time, it will continue to burn. Damage to the circuit breaker will directly affect the curre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/34H01H73/18
Inventor 马金泉夏艳庆董爱丽王艳杨周飞
Owner BEIJING BEVONE ELECTRIC CO LTD
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