All AC three-phase five-wire terminals of the security monitoring system software should be properly protected against lightning. Moreover, it should be ensured that the building where the machinery and equipment are located has excellent lightning protection grounding system software, and further determine whether the lightning safety device of the engineering building to which it belongs is properly applied, and the monitoring system lightning protection device is used.

Three-level protection should be considered for the power plug entering the supervisory host room. The first-level switching power supply lightning arrester can be installed at the three-phase five-wire switching power supply in the general high and low voltage distribution room of the building. The three-phase five-wire switching power supply of the building power distribution cabinet is installed with a secondary switching power supply lightning protection device, and the three-phase switching power supply lightning protection device is installed at the three-phase five-wire switching power supply that supervises the key machinery equipment in the main engine room. When the zero and ground working voltage are relatively high, it is not recommended to use 3 NPE or 1 NPE protection mode switching power supply lightning arresters.

Data statistics show that over 80% of the lightning safety accidents of the security monitoring system software are caused by the overvoltage of the magnetically induced lightning intrusion wave on the line connected to the system software. Therefore, to do a good job in the safety protection of the line connected with the system software is a link that cannot be ignored in the overall lightning protection.

The definition of video stream lightning protection is very simple, but it often happens that the lightning protection is unsuccessful due to carelessness in the work stage, and the video lightning protection itself is destroyed.

The problem of DC power supply safety protection, control line data signal protection and video stream protection is the same. The difference is that the DC power supply safety protection, control line data signal protection, the interface method is generally crimp type, there is no " The distinction between “yin” and “yang” means that the aforementioned problems of selling and buying the wrong goods will not easily arise.

However, on-site project staff must pay attention to properly connect such lightning arresters. Common signs are: input (IN), output (OUT), or: surge end, protection end, also known as: far side, near end. In other words, the input (IN), the surge end, also called the remote side, should be connected to the remote control line, which is very easy to introduce the end of the lightning overvoltage; the output (OUT), the protection end, also called the The near end should be connected to one end of the protected equipment.