Overvoltage protector consitituted by multi-spark angle

Abstract

An overvoltage protection device composed of a plurality of spark horns, including electrodes arranged in an insulating and airtight casing, the two electrodes are symmetrically arranged in a truss structure and an auxiliary ignition device made of insulating material is arranged between the electrodes, The electrodes with two truss structures form a pair of symmetrical V-shaped spark gaps, and arc extinguishing grids corresponding to the V-shaped spark gaps are respectively provided with alternating convex and concave arcs. In the present invention, two symmetrical frustum electrodes form two spark gaps. When the gap breaks down, the arcs on the two pairs of spark gaps move outwards under the action of electromagnetic force at the same time. Compared with the single spark gap structure, the instantaneous The state pulse current capacity is doubled. When the arc enters the arc extinguishing grid, the arc is divided into multiple arcs through the cooling of the arc, which increases the arc voltage and achieves the purpose of arc extinguishing.

Description

technical field [0001] The invention relates to an overvoltage protection device, in particular to an overvoltage protection device composed of a plurality of spark horns. Background technique [0002] In recent years, with the rapid development of the information industry, people have paid great attention to the hazards caused by atmospheric overvoltage and operating overvoltage in the system. There have been many reports on spark switches with various electrode shapes as overvoltage protection devices. Among them, the representative one is the gap type overvoltage protection device of German Phoenix Contact Co., Ltd. The device consists of two electrodes to form a "V"-shaped spark gap. When the gap is ignited, an arc is generated between the two electrodes. Under the action of electromagnetic force and heat, the arc moves forward along the V-shaped spark gap. The advantage is that it can withstand a large impact current, but the disadvantage is that the operating voltage...

AI Technical Summary

Problems solved by technology

Since the gap-type overvoltage protection device is only composed of a pair of spark gaps, the ability to pass current is still limited to a certain extent.

However, the research work on overvoltage protection devices used in power systems in my country started relatively late, especially the research level of overvoltage protection devices with large current capacity is relatively low.

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