The most effective way to prevent street lights from be […]
The most effective way to prevent street lights from being damaged by lightning:
1. External lightning protection combined with internal lightning protection
The general LED street lamp is made of conductor material, which is equivalent to a lightning rod. It must be installed with down conductor and ground net. These systems constitute an external lightning protection system. The system can avoid fire and personal safety accidents caused by direct lightning strikes on LED street lights. The internal lightning protection system refers to the protection of the equipment inside the street lamp through grounding and voltage protection. The system prevents inductive lightning and other forms of overvoltage intrusion, resulting in power supply damage, which is not guaranteed by external lightning protection systems. The two are complementary and complement each other. The internal lightning protection system is connected to an external lightning protection system or an overvoltage protector and equipotential bonding on many devices such as the outer casing, cables entering and leaving the protection zone, and metal pipes.
2. Lightning protection equipotential bonding
In order to completely eliminate the destructive potential difference caused by lightning, power lines, signal lines, metal pipes, etc. must be equipotentially connected with an overvoltage protector, and local equipotential bonding is also required at the interface of each inner protective zone. The local equipotential bonding should be connected to each other and finally connected to the main equipotential.
3. Set lightning protection zone
In addition to the power supply equipment, LED street lights will also be equipped with some communication devices for controlling the switch and brightness of the street lights. These devices and power supplies need to be placed in the lightning protection zone, and the protection area is directly shielded by the outer casing. The electromagnetic field here is much weaker.
4. High quality protection equipment - lightning protection module and overvoltage protection module
The role of the lightning arrester is to connect the protected system to the equipotential system in the shortest time (nanoseconds), so that the ports of the device are equipotential. At the same time, the huge pulse energy generated by the lightning strike in the circuit is released to the earth through the short-circuit line, and the potential difference between the interface ends of the device is reduced, thereby protecting the device.