GDT how to correct selection? Today from the electronic technology small to give us the following key steps! Allows you to quickly understand the GDT and selection selection skills. Unlock the selection of discomfort you discharge of ceramic gas!

GDT correct selection steps are as follows:
Join does not affect the normal operation of circuit 1, a gas discharge tube, it is necessary to ensure the lower limit of DC breakdown voltage of the gas discharge tube of the maximum working voltage must be higher than the normal line. To determine the required discharge of the nominal DC breakdown voltage.
2, determine the maximum instantaneous voltage line can withstand the impact value, to ensure that the breakdown voltage of the discharge tube value must be less than this value. In order to ensure that when the transient voltage comes, the discharge tube reaction speed faster than the speed of the line, the first step will be over voltage limit in the safe value. This is one of the most important indicators of the discharge tube. 3, according to the impact of current intensity into line, determine the choice of the discharge tube must reach the capacity of resisting impact current (such as: outdoors generally used above 10kA grade; in the end a general use 5kA grade; in the terminal equipment generally used about 2kA grade).
4, when the over-voltage disappears, to ensure the discharge promptly extinguished, so as not to affect the normal work of the line. This requires the discharge of the hold over voltage as high as possible, to ensure the normal operation voltage of circuit will not cause sustained discharge through the guide (i.e. continued flow).
5, if the overvoltage lasts for a long time, long time operation of the gas discharge tube will generate high heat. The protection device in order to prevent the heat caused damage to the equipment or the terminal at the same time in order to prevent any possible fire, the gas discharge tube at this time must be short circuiting device equipped with the right, we call the FS device (i.e. "failure protection device").
The gas discharge tube selection is very important, can play a long-term stability to ensure the quality of work is more important in the discharge tube.
The gas discharge tube has a strong high energy impact ability, but the specific use, the gas discharge tube in the discharge of residual pressure is very low, similar to a short circuit condition, it can not be used alone in the power source arrester, high flow capacity with the diameter of the gas discharge tube, the larger the diameter, flow resistance the better.
From the electronic gas discharge tube has the advantages of small volume, with lead type and surface mount type surge configuration, strong processing ability. They respond quickly to the transient overvoltage, which can dissipate a large amount of energy, thus greatly reducing the risk of equipment damage. The product of the energy dissipation capacity of super make it provide lightning surge protection of choice, especially suitable for outdoor telecommunications equipment.

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