How to choose the discharge tube ceramic gas discharge tube type ceramic gas_tage electronic-Professional production of TVS tube, self recovery fuse, patch fuses manufacturer
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How to choose the discharge tube ceramic gas discharge tube type ceramic gas
Publish:Shenzhen Tergy Technology Co., Ltd.  Time:2016-08-05
Ceramic gas discharge tube is currently the most widely used a lightning protection device, both the DC power supply lightning protection or various signal lightning protection, ceramic gas discharge tube can play a very good protective effect. In life, electrical appliances, who have voltage place, there will be a ceramic gas discharge tube in the arena, but to make good use of the ceramic gas discharge tube is required according to the actual working line, the reference gas ceramic put tube of the indicators selected appropriate ceramic gas discharge tube, otherwise it will be counter productive.
How to choose the discharge tube ceramic gas discharge tube type ceramic gas
How to choose the discharge tube ceramic gas discharge tube type ceramic gas?
(1) in fast pulse impact and ceramic gas discharge tube gas ionization need a certain amount of time (usually 0.2 ~ 0.3 g s, the fastest also about 0.1 s), and thus have a higher amplitude spike will leak to the rear. If you want to inhibit the sharp pulse, there are several methods: A, in the discharge tube with parallel capacitor or varistor; B, in the discharge tube series inductance or leave a proper length of transmission line, the sharp pulse decay to lower level; C, using two levels of protection circuit, to discharge tube as the first stage, to TVs pipe or semiconductor discharge tube is used as the second one, between two stages with resistor, inductor and self recovery fuse isolation.
The selection of the DC breakdown voltage Vsdc: the minimum value of the DC breakdown voltage Vsdc should be greater than 1.2 times the maximum power peak voltage or the maximum signal voltage.
Impulse discharge current selection: to be based on the line may be the maximum surge current or the need to protect the maximum surge current selection. Discharge tube impulse discharge current should be calculated according to the nominal impulse discharge current (or half of the single impulse discharge current).
The ceramic gas discharge tube for breakdown voltage error is large, generally do not make use of parallel.
The continued flow problem: in order to make the discharge tube after the impulse breakdown can properly extinguished arc, in possible flow places (such as active circuit can be continued on the discharge pipe series varistor or self recovery fuse restrictions continued flow, making it less than a discharge tube to maintain current.
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