What is the role of lightning arrestors in a distribution line?

Lightning arrestors play a crucial role in protecting distribution lines from power surges that can be caused by lightning strikes. When a lightning strike occurs, it generates a high-voltage surge that can travel along overhead lines, potentially damaging equipment and disrupting service. Lightning arrestors are designed to divert this surge to the ground safely, effectively preventing the excess voltage from impacting the distribution system.

By allowing the surge to be safely dissipated, lightning arrestors help maintain the integrity of the electrical infrastructure, prolonging the lifespan of transformers, switches, and other components in the distribution network. This protection not only ensures reliable service to consumers but also enhances the overall safety of the electrical grid.

The other choices present functions that do not align with the primary purpose of lightning arrestors. Improving voltage regulation is related to managing the voltage levels within the grid, while increasing the flow of current pertains to enhancing the amount of electricity transmitted through a line. Measuring frequency deals with monitoring the rate of alternating current in the system, which is not related to the protective role of lightning arrestors.