SPD surge protection device is an electrical equipment used to limit transient overvoltage and discharge surge current. It is also called lightning arrester, which is an important part of the internal lightning protection device. It is installed at the front of the protected equipment to effectively reduce the transient overvoltage of the protected line in the lightning environment. According to the different protected equipment, it can be divided into two types: power surge protector and signal surge protector. So, what are the specific functions of these two kinds of surge protectors?
The SPD surge protection device is installed on the power supply line to effectively protect the safety of electrical equipment under the environment of lightning strike. The power surge protector is mainly installed in the household distribution cabinets and hierarchical distribution cabinets of DC and AC distribution systems. According to the division and protection requirements of lightning protection zones in the Code for Lightning Protection Design of buildings, the comprehensive lightning protection of power supply is divided into four levels. But in fact, professional surge protection supplier can provide more than three levels of power surge protection measures will be taken according to the user's budget and the importance of the building and the protected equipment, which can effectively protect the safety of electrical equipment.
The signal surge protector is installed on all kinds of signal lines to protect the safety of weak current equipment under the environment of lightning strike.
With the wide application of micro devices, signal surge protection is a very important lightning protection measure, which mainly includes six categories: monitoring signal, video signal, telephone signal, network signal, control signal, antenna feed signal and so on.
The signal surge protector is installed in series at the front end of the protected equipment (camera, network switch, telephone exchange, etc.). In the environment of lightning strike, it can effectively reduce the transient overvoltage of the signal line and ensure the safety of the signal line. in order to protect the weak current equipment on the signal line.
To sum up, the surge protector can effectively protect the power supply and signal system of the building under the environment of lightning strike and effectively reduce the lightning risk and the hidden danger of lightning, which is an important aspect of the integrated lightning protection system.
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