EN Education

How important is lightning protection in the monitoring system?

With the arrival of the lightning season, it brings many security risks for the monitoring equipment, which may cause the loss of the monitoring image or image instability, or lead to the failure of the entire system.

1. Lightning damage to video surveillance system.

Lightning that damages the stability of the video surveillance system mainly includes direct lightning, induced lightning (including electrostatic induction and electromagnetic induction). Direct lightning is a rapid discharge between charged clouds (thunderclouds) and buildings, other objects, ground or lightning protection devices. Inductive lightning is also known as lightning induction or overvoltage induction, including electrostatic induced lightning and electromagnetic induced lightning.

a) Damage to the exposed device

Most surveillance cameras are installed outdoors, where equipment or cables are at greater risk of being damaged by direct lightning. In addition, it is also very sensitive to electromagnetic interference such as lightning overvoltage and power system operation, and electrostatic discharge, etc., which easily damage the equipment and may cause the entire system to fail in case of collision. be monitored

b) Damage to the transmission line

According to research, induced lightning easily damages transmission lines. It can attack the system by power cables, video lines, network lines and antennas, etc. and damage the device.

c) Damage to the backup device

When the power line, monitoring system signal line or other metal cables entering the control room are struck by lightning or induced by lightning, the back devices are damaged by the high potential difference caused by the lightning waves through the cables. . Most of all, if there is no lightning protection on the switches in the monitor room, it can easily strike the system.

2. Hardware failure of the switch caused by lightning

This indicates that lightning is the main cause of hardware failure and affects the stability of the switch. Power outages, port failures, and switch cable failures occur frequently due to lightning.

– Power outage: The external power supply of the switch is unstable, the power cable is worn out or struck by lightning, and other reasons easily lead to power outage. In addition, damage to other parts of the device due to the power supply is often caused.

– Port failure: If part of the network cable connected to the switch port is exposed to open space. And if lightning strikes the cable, it will cause damage to the connected switch port or unexpected damage to other equipment.

– Cable failure: even cable failure does not belong to the switch itself, in practical use it often leads to the failure of the switch or port system to function properly. The device may fail due to cable damage due to lightning strike.

Therefore, it is very important to design the lightning protection of the switch to prevent such damage.

3. Eriont anti-lightning switch

In order to prevent the switch from being damaged by lightning, Arionet has produced 5/8 P series anti-voltage switches with 6 kV fluctuating safety, which is specially designed for security monitoring projects. In order to prevent damage Seeing the switch due to lightning, Eriont has produced 5/8 P series anti-voltage switches with 6kV surge safety, specially designed for security monitoring projects.

The protective circuit of this series uses TSS discharge, which can reach the lightning protection level of 6KV, which can prevent the damage of the switch caused by lightning strike or the loss of monitoring image. This product uses high performance P0640SC protection device and can pass the 6kv-8/20us or 1.2/50us waveform common mode lightning test standard.