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Principle of selection of lightning arresters
The signal lightning arrester is mainly equipped with lightning protection devices on the communication signal line, mainly including: video signal lightning protection device, network signal lightning protection device, audio signal lightning protection device, control signal lightning protection device, etc., signal lightning protection device selection It is also equipped according to the condition of the equipment.
First, the type of protection signal
As the signal level tends to be lowering, it is more susceptible to overvoltage. At the same time, electronic products have been involved in all walks of life, a wide variety, how to use the appropriate signal overvoltage protector (signal lightning arrester), is a major problem that plagues the majority of users, and we usually consider the following main parameters:
Digital quantity / analog quantity
2. Working voltage
3. Working frequency
4. Interface standard
5. Use occasions
In summary, it generally includes:
1. High frequency (microwave / wireless communication)
2. Computer local area network, wide area network
3. Industrial automation control signals
4. Modern office communication network (data line, etc.)
5. Video System (CATV / CCTV)
Second, how to choose a signal arrester
1. Working voltage (depending on the working voltage of the equipment, choose the appropriate protection voltage lightning arrester)
2. Working frequency (depending on the requirements of the equipment for the insertion loss of the arrester, choose the lightning arrester with different bandwidth)
3. Interface standard (select lightning arresters of different interfaces according to the type of equipment interface (RJ11\RJ45\BNC, etc.), metric, and English)
4. Connection with other devices (whether or not the overvoltage is introduced or output due to connection with other networks)
5. Grounding condition (If the ground potential is unstable, the shielded and anti-interference arrester should be selected)
It is very important to protect the system communication against lightning protection. It is very important to select appropriate protection devices. The lightning protection products should be fully matched with the communication equipment.