What do lightening arresters protect a substation from?

Lightning arresters are devices designed specifically to protect electrical systems, including substations, from the damaging effects of lightning strikes and voltage surges. When lightning strikes occur, they can induce extremely high voltage surges that can damage equipment and disrupt operations. Lightning arresters function by diverting these surges safely to the ground, thereby preventing them from entering the substation's electrical system.

In this context, they create a protective pathway for lightning currents and high voltage transients, ensuring the integrity and functionality of the electrical infrastructure. This protection is vital in maintaining the reliability and continuity of electricity supply, as well as extending the lifespan of the equipment utilized in the substation.