<P> A lightning arrester ( alternative spelling lightning arrestor ) ( also called lightning diverter ) is a device used on electric power systems and telecommunication systems to protect the insulation and conductors of the system from the damaging effects of lightning . The typical lightning arrester has a high - voltage terminal and a ground terminal . When a lightning surge ( or switching surge , which is very similar ) travels along the power line to the arrester , the current from the surge is diverted through the arrester , in most cases to earth . </P>
<P> A lightning arrester ( alternative spelling lightning arrestor ) ( also called lightning diverter ) is a device used on electric power systems and telecommunication systems to protect the insulation and conductors of the system from the damaging effects of lightning . The typical lightning arrester has a high - voltage terminal and a ground terminal . When a lightning surge ( or switching surge , which is very similar ) travels along the power line to the arrester , the current from the surge is diverted through the arrester , in most cases to earth . </P>
lightning arresters are used in power systems to protect electrical equipments against
lightning arresters are used in power systems to protect electrical equipments against
the damaging effects of lightning
the damaging effects of lightning