Lightning Protection Devices for Thundaring Protection

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 and control system lightning protection, 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. The protection range of a lightning rod is not sufficient to protect thousands of kilometres of transmission lines. Therefore, 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, the nearby, when lightning strikes, the charge 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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