What Is A Signal Surge Protector? Only By Understanding It Clearly Can You Choose It With Confidence.

What is a signal surge protector? Many friends will be stunned when they hear this name, and they don't know what a signal surge protection device is specifically. Nowadays, microelectronic components are widely used in modern society, and signal surge protective device play a vital role in lightning protection of electronic systems.

1. What is a signal surge protector

In fact, a signal surge protector is a type of surge protector. It refers to a lightning protection device that is connected in series to the signal line to limit transient overvoltages in the signal line and to discharge surge currents.

2. Classification of signal surge protectors

According to the different types of protected lines, signal surge protectors can be divided into network signal surge protectors, monitoring signal surge protectors, control signal surge protectors, video signal surge protectors, telephone signal surge protectors, explosion-proof signal surge protectors and other types. Each type has many models, parameters and different appearances.

3. Working principle of signal surge protectors

The two important functions of the signal surge protector, discharge of lightning current and limitation of surge voltage, are completed by the nonlinear elements in the signal surge protector. The nonlinear element in the signal surge protector is a nonlinear resistor and also a switching element. Usually it refers to a varistor. Its working principle is that the nonlinear resistor is connected between the line and the ground. Under normal circumstances, it can be considered as an open circuit. In the case of overvoltage in the electronic system, the transient overcurrent that exceeds the system can withstand is discharged into the ground, thereby reducing the overvoltage on the line or equipment and ensuring the safety of the signal line and equipment.

The signal surge protector is installed in series on the line. Therefore, when selecting a signal surge protector, it is necessary to ensure that the protector can play a protective role. At the same time, the matching problem of the signal surge protector and the communication line must also be considered. Therefore, the selection of the maximum working voltage of the communication line surge protector is determined based on the working voltage of the data communication line. It is an important parameter for selecting a signal surge protector. However, in practical applications, there is no common standard for the selection of different communication lines.

Fourth, the role of the signal surge protector

First, it limits the transient overvoltage caused by induced lightning in the signal line. According to surveys, more than 80% of lightning strikes on electronic systems are caused by induced lightning. Therefore, with the widespread application of microelectronic devices in modern society, the induction lightning protection of electronic systems should be strengthened, and suitable signal surge protectors should be installed.

The second is to limit the surge caused by the start and stop of electronic systems. In addition to the surge caused by lightning induction, the most important reason for the surge in the signal line is the start and stop of electronic equipment. This surge is also ubiquitous. The installation of an adapted signal surge protector on the line can effectively suppress the surge caused by the operation of the electronic system, and can effectively reduce the degradation and failure of electronic sensitive devices, ensure the stability of the signal line, and extend the service life of electronic equipment.

In summary, according to the requirements of GB50343-2012, Technical Specifications for Lightning Protection of Electronic Information Systems in Buildings, when designing the lightning protection system for buildings, the characteristics of electronic equipment should be fully considered, and comprehensive lightning protection measures should be taken according to the engineering requirements and national standards, and appropriate signal surge protectors should be selected!