I once heard a sentence in a very good Shenzhen company: "Whether wave soldering is relatively simple compared to reflow soldering, our company needs to have full-time expertise to do this, what our company needs. Yes: someone specializes in doing things." I only use this sentence as a starting point, special person to do special things, personal expertise! The same as the company.
In the LED lighting industry, I have published four articles, each of which is half of the explanation for what is reasonable lightning protection technology, and half is why the LED lighting industry is not doing well in the field of outdoor lighting. Today, let's take a look at how the lighting, lights, electrical equipment, platforms and garages of the former Ministry of Railways do "lightning protection".
In view of the fact that the entire LED lighting industry has to deal with lightning protection related matters to the power company, then let's see what happens to the lightning surge.
1 The cause of lightning surge
Just Baidu, everyone will find that the cause of the lightning surge is divided into two parts: external reasons and internal reasons.
External causes: direct lightning strikes or lightning between clouds, extremely unstable changes in electromagnetic fields, etc.;
Internal reasons: operation overvoltage, ground potential counterattack, space electromagnetic coupling and other reasons.
2 lightning strikes
Power line crosstalk, space electromagnetic coupling into sensitive devices, PE potential is too high or unstable, resulting in PE breakdown to N, antenna effect, etc.
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3 lightning strikes the energy of the surge
The energy of a single direct lightning strike is about 55 kilojoules of energy, which is 55 degrees of electricity. The problem is that the 55-degree power passes through a fixed physical point in less than a nanosecond. Therefore, we say that the lightning surge is very energetic, but there is a way to solve this problem.
There is a joke in our lightning protection industry: the heroes of Marvel will always absorb the thunder and lightning energy, and then they will become very powerful and powerful. Then the question is coming. How long does it take for the hero of this sad reminder to be filled with the energy of Superman?
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4 general solutions for lightning surges
Following the EMC theory, in the lightning protection industry, we also use the same method: partition multi-level protection, the specific method I have already detailed in the previously published article, this "partition multi-level protection" method on Baidu It can also be easily queried.
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So, let's take a look at the LED lighting industry. Since my article has been seen by many people, I am saying whether I can participate in the outdoor high-power power solution. Then I can say very responsibly here: Thank you for your trust in me. But I don't think lightning protection is a main function of the power supply. I don't agree that the responsibility of lightning protection needs to be borne by the power company. I don't agree that the system protection project is just something that the power company can afford.
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