Does varistor really protect against lightning?

Many people may not know what the core components of our lightning protection device are. It may be strange to say that it is actually a resistor -varistor, and possibly a discharge tube, but it mainly depends on the chip pressure. Varistors are used to fight against huge lightning, but many customers and friends will question that such small varistors can not withstand the violence of lightning. This kind of lightning protection is an international joke. To fool people who don't understand it, people who don't understand it will say so. Let me talk about it in detail

In fact, first of all, we need to understand the lightning invasion modes: direct lightning, inductive lightning, and lightning wave invasion. The specific meaning has been explained in the previous article. I won't repeat them here. Only the lightning protection of varistor is mentioned here. It is not our lightningtyrannythat thunders directly. If it really thunders directly, no matter how strong the iron wall is, it may break you, let alone this small chip? This is a mess for you. For direct lightning strikes, our old lightning rod will naturally take care of them. Our varistor officially protects against induced lightning waves rather than direct lightning strikes. Then netizens will do it again. How did he prevent it

Varistor

Varistor is a voltage limiting protection device. Using the nonlinear characteristics of the varistor, when overvoltage occurs between the two poles of the varistor, the varistor can clamp the voltage to a relatively fixed voltage value, thus realizing the protection of the subsequent circuit. The response time of the varistor is ns. What is the concept of NS? The air switch you usually know can only reach microsecond level. The response speed of the air switch, as you should know, is basically available in every family, but there is a problem with the circuit. The air switch is closed when brushing, so this is its speed. So, compared with the speed of this varistor, it is insignificant, microsecond and nanometer. The multiple is the third power of 10, which is thousands of times, which is unimaginable. So don't look at such a small thing, but it has such a big impact