10/350 shock current system for air or vacuum crowbar switch

Abstract

The invention relates to a 10/350 impact current system of an air or vacuum CROWBAR switch, which comprises a capacity resistance connected with the power, a main discharging gap, an inductance and a resistance, wherein it coupled with a CROWBAR switch between the main discharging electrode and the capacity discharging circuit of the inductance; the CROWBAR switch comprises an active electrode and a fixed electrode or it fixes fabrics a trigger electrode in the fixed electrode or the discharging gap between the active electrode and the fixed electrode; it electric connects a trigger system between the active electrode and the fixed electrode or between the fixed electrode and the trigger electrode.

Description

technical field [0001] The invention relates to an impact system of an overvoltage protector, in particular to a 10 / 350 impact current system of an air or vacuum CROWBAR switch. 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 a large number of reports on various electrode shapes of the I(B) level gap type spark switch as a first-level I(B) level overvoltage protection element and device. The representative ones are German PHOENIX, German OBO and French CITEL gap overvoltage protectors. [0003] I(B) gap type overvoltage protector (gap type SPD) is mainly used to withstand I(B) level direct lightning strike, and its waveform is 10 / 350μs impulse current wave. [0004] The impulse current test of I(B) gap type SPD is different from zinc oxide resistors used in power systems and piezore...

AI Technical Summary

Problems solved by technology

Such a large impact energy will cause the following problems: First, the energy of thousands of kilojoules needs hundreds or even thousands of μF capacitors to store, the impact current generator is very large, and the safety and reliability of high voltage operation On the other hand, thousands of kilojoules of energy will be released on the discharge switch, which will seriously corrode the commonly used air spark switch, and the huge energy release will cause electromagnetic and noise pollution to the operating environment

[0007] It can be seen that the I(B) gap type 10 / 350μs impulse current test system has very strict requirements on the CROWBAR switch, otherwise, the stability and reliability of the CROWBAR switch level impulse current test system cannot be guaranteed at all.

[0008] In addition to being bulky, the CROWBAR switch in the I(B) gap type 10 / 350μs impulse current test system developed by HAEFELY company has a very obvious disadvantage that the gap distance of the three electrodes of the CROWBAR switch needs to be adjusted according to the test conditions, and the adjustment and coordination It is very difficult, and it is also affected by air humidity, electrode surface state, etc. Therefore, the stability and reliability of CROWBAR switch work are poor, and it is basically only suitable for laboratory research and is limited to professional operations, which cannot meet The need for testing and research of gap overvoltage protectors, especially I(B) gap type overvoltage protectors

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