High-voltage arc extinguishing device for power grids

Abstract

The invention discloses a high-voltage arc extinguishing device for power grids, which mainly relates to the field of arc extinguishing devices. The high-voltage arc extinguishing device comprises a shell which is internally provided with switch contacts. The switch contacts include a moving contact and a static contact. The shell is equipped with an air blowing device and a grid device. The high-voltage arc extinguishing device further comprises an inert gas supplement tank and an out-gassing device. The air blowing device includes a dust filter device, an air channel, an electromagnetic valve and a blower fan. The grid device includes a metal grid and a grid driving device. The beneficial effects are as follows: the novel air blowing device not only can blow out an air flow at uniform speed, but also can blow out a multi-direction staggered air flow capable of elongating and bending the arc in multiple directions; by combining the air blowing device with the arc cutting effect of thegrid device, the arc can be extinguished more effectively; inert gas can be supplemented after primary arc extinguishing; and the grid driving device is has a simpler structure and is easy to control.

Description

technical field [0001] The invention relates to the field of arc suppression devices, in particular to a high-voltage arc suppression device for a power grid. Background technique [0002] The arc extinguishing device is used to interrupt or extinguish the arc generated when a pair of current-carrying contacts are disconnected. As the contacts separate from each other, current flows in a correspondingly smaller contact area, causing the temperature in this area to gradually increase. A fusing bridge will be generated at the moment before the contacts are separated, and the fusing bridge will eventually break when the current is small; when the current is high, the fusing bridge will evaporate. The current can therefore only continue to flow through an arc in the form of a conductive plasma column. [0003] In the current existing arc suppression device, the air blowing device is to blow air through the cylinder, which has a great defect that the air blowing of the cylinder...

AI Technical Summary

Problems solved by technology

[0003] In the current existing arc suppression device, the air blowing device is to blow air through the cylinder, which has a great defect that the air blowing of the cylinder cannot blow out a uniform air flow, and the arc can only be blown long, and the direction of the air flow cannot achieve a good effect. The effect of arc blowing

In addition, the use of inert gas in the housing is one-time, and there is no corresponding inert gas supplement after one arc extinction, and the structure of the grid drive device is too complicated and impractical

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