How to protect LED streetlights from lightning strikes

Release Date:

2020-08-12 17:10

Source:

The following methods are the most effective ways to protect LED streetlights from lightning damage: 1. Combining external and internal lightning protection Nowadays, typical LED streetlights are made of conductive materials, effectively functioning as lightning rods themselves. Therefore, their design must include down conductors and a grounding grid; together, these components form the external lightning protection system. This system helps prevent fires and personal safety hazards caused by direct lightning strikes. The internal lightning protection system, on the other hand, safeguards the streetlight’s internal components through grounding and voltage‑protective devices. It prevents induced and other forms of overvoltage from entering the power supply, thereby protecting the equipment.


　　The following methods are LED Streetlight The most effective way to protect streetlights from lightning damage is:
1、 Combining external and internal lightning protection
　　Now generally led Streetlight The exterior is made of conductive material, effectively functioning as a lightning rod itself.
　　By design, down conductors and a grounding grid must be installed; together, these components form the external lightning protection system. This system helps prevent fires and personal safety hazards caused by direct lightning strikes. The internal lightning protection system, on the other hand, safeguards equipment within street lighting installations through grounding, voltage‑level protection, and other measures. It protects against induced overvoltages and other forms of transient surges that could damage power supplies—something the external system alone cannot ensure. These two systems are complementary and mutually reinforcing. In many components—such as enclosures, cables entering or exiting protected zones, and metallic conduits—the internal system requires connection to the external system or the installation of surge protective devices, along with equipotential bonding.
2 , Lightning Protection Equipotential Bonding
　　Completely eliminate destructive potential differences caused by lightning; power cables, signal lines, metal conduits, and other conductive elements must be equipotentially bonded using surge protective devices. Local equipotential bonding is also required at the interfaces between each inner protection zone, and all such local equipotential bonds must be interconnected, ultimately connecting to the main equipotential bonding point.
3、 Set up a lightning protection zone
　　Currently LED Streetlight In addition to the power supply equipment, certain communication devices are installed to control the on/off status and brightness of streetlights. Both these devices and the power supplies must be located within a lightning protection zone, with their enclosures providing direct shielding. The electromagnetic field in this area is significantly weaker.
4 , High-quality protective equipment -- Lightning protection module and overvoltage protection module
　　The function of a surge arrester is to connect the protected system to the equipotential bonding network in the shortest possible time, ensuring that all ports of the equipment are at the same potential. At the same time, it diverts the enormous pulse energy generated by lightning strikes through a low‑impedance path to ground, thereby reducing the potential difference across the device’s interfaces and protecting the equipment. The technical R&D team at Zhongdian Huaxing believes that, LED The streetlight power supply module must not only be designed in accordance with the aforementioned requirements but also undergo a rigorous testing and verification process.
　　 a A control device with constant-voltage output capability, or constant-current output capability, or both.
　　Placement should adopt GB19510.12/IEC61347-2-13 Safety standard inspection.
　　 b For entities over which only control is exercised LED A control device for logical functions such as brightness, dimming, flashing, and color changes,
　　Should adopt GB19510.12/IEC61347-2-11 Safety standard inspection.
　　 c If a control device performs the functions of both of the aforementioned types, it shall be in accordance with… GB19510.12/IEC
　　 61347-2-13 Safety standard inspection.


Keywords:

Streetlight lens, LED streetlight

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