How is LED street light power supply protected against lightning strikes? LED street light is a kind of traffic lighting products used on outdoor roads. The LED street light power supply that supplies power to it generally also needs to meet the requirements for outdoor use. The lightning strike is the most important issue. The following Zhongfu Optoelectronics will mainly explain the lightning strike method of LED streetlight power supply for the risk of lightning strike:



1. External lightning protection combined with internal lightning protection

Nowadays, the general LED street lamp power supply is made of conductor material, which is equivalent to a lightning rod. It is necessary to install the down conductor and the 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 means that the interior of the street lamp is protected by grounding and voltage protection. The system can prevent inductive lightning and other forms of overvoltage intrusion, resulting in the destruction of the LED street light power supply, which is not guaranteed by the external lightning protection system.

2. Install 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 interfaces of the device is reduced, thereby protecting the device. So we can install a lightning protection device in the LED street light power supply.

3. Set lightning protection zone

At present, in addition to LED street light 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, 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 by 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.

In summary, when we use LED street light power supply, we must do the necessary protective measures to help the normal use of LED street lights, and avoid unnecessary risks such as lightning strikes.