What is the purpose of a lightning arrester?

Lightning arrester is a protective device used for protection against lightning strike it is a metal rod which is of copper, steel or aluminium installed on top of the building structure and connected to the earth by means of down conductor.

Lightning arresters are used for protecting the building structure from direct lightning this building structure may be Residential Building, Commercial Building, school offices etc. lightning strike is common during rainy season it's a natural phenomenon and act of nature but during lightning strike the cloud generate heavy static energy.

This energy is nothing but simple electrical energy which has been developed between the ground and the sky during this process ground has been positively charged and sky has been negatively charged hence the negatively charged energy travels towards the positively charged energy towards the ground and strikes at the tallest point in the ground which can be a tallest tower an isolated tallest trees any object which is tall in the surrounding area are on high risk of at the time of strike

Protection from this unpredicted nature calamities lightning arrester is used which are always installed on the top of the building so that when the Lightning Strikes it will strike on lightning arrester and the strike which hits the Lightning arrester can easily be discharged to ground without any damage to the structure