WAZIPOINT Engineering Science & Technology: Lightning Protection Devices for Thundering Protection

Thursday, September 22, 2022

Lightning Protection Devices for Thundering Protection

Lightning Protection Devices
Fig-Sample of thundering in a vibrant cityscape

Lightning Protection Devices

The lightning protection device is by means of modern lightning and other technology to prevent electrical equipment from being struck by lightning. Lightning protection equipment can be divided into lightning protection, lightning protection socket, antenna feeder protection, signal lightning protection, lightning protection test equipment, measurement, control system lightning protection, and earth pole protection.

According to the principle of sub-field lightning protection and multi-level protection according to IEC (International Electrotechnical Committee) standard, B-level lightning protection belongs to the first-level lightning protection device, which can be implemented in the main distribution cabinet. building; Class C belongs to the second level lightning protection device, used in the sub-circuit distribution cabinet of the building; Class D is a third class lightning arrester, which is precisely mounted on the front end of critical equipment for safety.

Development of Lightning Protection Equipment

The widespread use of electricity has promoted the development of lightning protection products. When the high-voltage transmission network provides electricity and lighting for thousands of homes, lightning flashes also endanger the high-voltage transmission and transformation equipment. 

The high-voltage line is erected at a high level, the distance is long, the terrain is complex, and it is easy to be struck by lightning. A lightning rod's protection range is insufficient to protect thousands of kilometers of transmission lines. Therefore, the lightning protection line has emerged as a new type of lightning receptor to protect high voltage lines. 

After the high-voltage line is protected, the power and distribution equipment connected to the high-voltage line is still damaged by the over-voltage. It is found that this is due to "induction lightning". (Inductive lightning is induced by direct lightning strikes in nearby metal conductors. Inductive lightning can strike conductors via two different sensing methods. First, electrostatic induction: 

When the charge in the thundercloud increases, nearby, when lightning strikes, the order in the thunder is quickly released, and the static electricity in the conductor bound by the thundercloud electric field will also flow along the conductor to find the release channel, which is the circuit pulse. The second is electromagnetic induction: when a thundercloud discharges, a rapidly changing electric current generates a strong transient electromagnetic field around it, creating a highly induced electromagnetic force in nearby conductors The study showed that the surge caused by electrostatic induction is many. More often than the surge caused by electromagnetic induction. A surgeon a Thunderbolt high-voltage line.


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  2. There are many ways in which lightning strikes can cause damage or injury. Lightning strikes (or even electrical discharges due to nearby lightning) can cause fires, explosions, chemical release or mechanical disruption within or around a building. Step and touch voltages generated from a lightning strike can cause injury, or even loss of life, to humans (and animals) in the close vicinity.

    At Furse, we are fully aware that all these risk need to be considered and protected against when developing a lightning protection system. With over 100 years of experience our support and expertise has assisted thousands of businesses, both large and small, to achieve effective protection against lightning.


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