Use of Lighting Arrester

Lighting Arrest or Surge diverter is a type of protective device that transmits high voltage surge directly to the ground in the power system. Homes, factories, transmission lines, transformers, switchgears, power stations and other equipment are damaged if the lighting arrester is not used. Proper use of lighting arresters is very important for this.

Lighting arrest or surge diverter is a kind of protective device. In the power system, the Surge diverter transmits high voltage surge to the ground. The overhead lines are in the open under the sky so that thunderstorms can occur on these lines at any time of the day or night. Thunderstorms or surges increase the line voltage at multiples. Lighting Arrester is a device that is used along the line to protect all homes, factories or other machinery that is supplied with electricity from overhead lines due to the harmful effects of this excess voltage.

Since the main function of a lighting arrester is to send lightning directly to the ground when lightning strikes the line, the lighting arrester has to be earthed by an earthling lead.

Arresters are mostly installed near critical appliances of entry. Examples like an electrical panel or near a generator. When potentially dangerous lightning strikes, the arrester rise and diverts the lightning to the ground. Where the arrester will disperse harmlessly. It’s important to remember that an arrester doesn’t stop lightning, since that would be dangerous. It does, in fact, limit and mitigate the electrical charge power, but divert is the accurate term, as it needs to give the lightning a safe route to travel, rather than through your personal important electrical devices. You can kind of think of it as a detour for very dangerous electricity, which actually wouldn’t be far off at all. 

Md. Husne Fahad


Daffodil Polytechnic Institute

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