Active overvoltage protection gap with plug-and-pull function in gas environment

A gas environment and protection gap technology, applied to overvoltage arresters, circuits, spark gaps, etc. that apply spark gaps, can solve problems such as inability to reduce the pressure ratio of overvoltage protection gaps, surface pollution of flashover rods along the surface, and reduced safety. , to achieve strong trigger carrier release capability, fast lightning overvoltage response characteristics, and reduce the effect of pulse breakdown voltage

Active Publication Date: 2018-12-18
华格电子(昆山)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Invention patent ZL 2006 1 0104775.9 discloses an overvoltage protection device with surface flashover in a vacuum environment. Its technical feature is that there are two grooves on the surface of the two main electrode contacts of the overvoltage protection gap. There are flashover rods installed in the two grooves. When lightning overvoltage occurs, the main electrode of the overvoltage protection gap discharges the energy of the lightning current through the flashover rod along the surface, but it also causes surface pollution and consumption of the flashover rod along the surface. , which will affect the service life of the overvoltage protection gap. More importantly, the existence of flashover rods along the surface cannot reduce the voltage ratio of the overvoltage protection gap. In the overvoltage protection gap, the pulse breakdown voltage decreases and the voltage protection level At the same time as the improvement, the DC breakdown voltage of the overvoltage protection gap is also reduced, and the safety of normal operation is reduced. Therefore, the performance improvement of the overvoltage protection gap is limited
At present, the overvoltage protection gap cannot meet the above requirements, and its performance indicators still need to be improved

Method used

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  • Active overvoltage protection gap with plug-and-pull function in gas environment
  • Active overvoltage protection gap with plug-and-pull function in gas environment

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Embodiment 1

[0018] Example 1, see figure 1 , the present invention includes the upper insulating shell 1, the lower insulating shell 2, the upper end flange 5 and the lower end flange 6, and the air pressure is 10 0 ~10 3 or 10 4 ~5×10 5 The cavity of Pa is provided with an upper electrode 3 installed on the upper flange 5 in the cavity, and a ring-shaped intermediate electrode 4 with a thickness of 3-6mm is installed between the upper insulating shell 1 and the lower insulating shell 2, and the upper The main discharge gap is formed between the electrode 3 and the ring-shaped middle electrode 4. Between the lower end flange 6 and the ring-shaped middle electrode 4, an inner diameter of 5-12mm, a ring width of 4-10mm, and a height of 5-15mm are installed for insulation and isolation. The annular surface flashover insulating dielectric material 7, the surface discharge trigger forming the active overvoltage protection gap between the lower flange 6, the annular surface flashover insulat...

Embodiment 2

[0019] Example 2, see figure 2 , the lower part of the annular surface discharge insulating dielectric material 7 of the present invention is cylindrical, and the inner side of the upper cylinder is trapezoidal, and the contact between the annular surface discharge insulating dielectric material 7 and the upper surface of the annular intermediate electrode 4 and the lower flange trigger electrode 6 A surface flashover discharge interface 9 is formed between the points, and the acute angle between the surface flashover discharge interface 9 and the upper surface of the lower flange 6 is 30°-70°.

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Abstract

An active overvoltage protection gap with a plug-and-pull functions in a gas environment, comprises a cavity with an air pressure of 10<0> to 10<3> or 10<4> to 5 * 10<5> Pa, An upper electrode is arrange in that cavity, a discharge gap formed between the annular intermediate electrodes, a disk-shaped trigger electrode is mounted in the cavity, Between that trig electrode and the intermediate electrode, an annular insulating dielectric material is arrange, a surface flashover discharge interface is for between that trigger electrode, the surface insulating dielectric material and the intermediate electrode to form an active overvoltage protection gap, and the surface flashover discharge interface is perpendicular to or at an acute angle with the low surface of the intermediate electrode, and a shielding cover is arranged in an upper insulating shell around the upper electrode and the intermediate electrode. The upper electrode, the middle electrode and the trigger electrode all extend out of the plug for external electrical connection. The invention can reduce the pulse breakdown voltage of the overvoltage protection gap, and has the characteristics of extremely fast response, strong power frequency freewheeling suppression ability and longer service life.

Description

technical field [0001] The invention relates to a high-performance overvoltage protection gap in the field of electronics and communication, in particular to an active overvoltage protection gap with a plug-in function in a gas environment. Background technique [0002] High-performance overvoltage protection gap is a key overvoltage protection device for electronics and communications. Most of the active overvoltage protection gaps used for overvoltage protection at home and abroad adopt field-induced triggering or field distortion triggering, making the active overvoltage protection gap The voltage protection level is generally not too high, and the voltage ratio between the pulse breakdown voltage and the DC breakdown voltage is generally greater than 1, around 1.1 to 1.5. Invention patent ZL 2006 1 0104775.9 discloses an overvoltage protection device with surface flashover in a vacuum environment. Its technical feature is that there are two grooves on the surface of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T4/10H01T4/02H01T1/22
CPCH01T1/22H01T4/02H01T4/10
Inventor 黄章庆黄湘柏陈景亮姚学玲
Owner 华格电子(昆山)有限公司
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