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Lightning protection measures for solar street lights
Category: Company News
Dec 10,2021
Lightning protection methods for street lights. Summer is a season with frequent thunderstorms, making it essential to implement lightning protection measures for outdoor street lights, as their height makes them particularly vulnerable to lightning strikes. There are four main types of lightning strikes on street lights: switch overvoltage, induced lightning, conducted lightning, and direct strikes.
How can we prevent lightning strikes on street lights? Let's take a look at several scientifically proven lightning protection measures for street lights from Jiangsu Kaiyuan Solar Lighting Co., Ltd.:
Lightning protection method one: equipotential bonding for lightning protection. To completely eliminate the destructive potential difference caused by lightning, power lines, signal lines, metal pipes, etc., must be connected using overvoltage protectors for equipotential bonding. The interfaces of various internal protection zones of the street light power supply should also be partially connected for equipotential bonding, and all parts should be interconnected and ultimately connected to the main equipotential point.
Lightning protection method two: combining external and internal lightning protection. Street lights generally have two systems: an external lightning protection system and an internal lightning protection system. These two complement each other. The internal lightning protection system must connect to the external lightning protection system or set up overvoltage protectors on many devices such as enclosures, cables entering and exiting the protection zone, and metal pipes, and perform equipotential bonding.
Generally, the exterior of LED street lights is made of conductive materials, which effectively acts as a lightning rod. Therefore, it is necessary to install down conductors and grounding systems in the design of street light power supplies. These systems form the external lightning protection system. Such a system can prevent LED street lights from catching fire or causing personal safety incidents due to direct strikes. The internal lightning protection system refers to protecting equipment inside the street light through grounding and voltage protection methods. The internal system can prevent induced lightning and other forms of overvoltage intrusion that could damage the power supply, which cannot be guaranteed by the external lightning protection system. The role of the street light surge protector is to connect the protected system to the equipotential system in the shortest time (nanosecond level), ensuring that all ports of the equipment are at the same potential.
At the same time, it releases the huge pulse energy generated by a lightning strike in the circuit to the ground through a short path, reducing the potential difference at each interface of the equipment, thus providing protection for the equipment. Lightning protection method four: setting up a lightning protection zone. Many LED street lights not only have power surge protection systems but also set up communication devices to control the switching and brightness of street lights. These devices and power supplies need to be located within the lightning protection zone, which is directly shielded by enclosures since electromagnetic fields in these areas are much weaker. The above-mentioned street light lightning protection plans have been practically proven by experts and verified through scientific design and rigorous testing, demonstrating that they can not only ensure that LED street light systems are not harmed by lightning but also eliminate common mode and differential mode interference from lightning on street light power supply equipment.
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