Lightning arrester
DEVICE IN POWER/TELECOMMUNICATION SYSTEMS THAT PROTECTS AGAINST LIGHTNING, SUCH THAT WHEN A LIGHTNING SURGE HAPPENS, THE CURRENT IS DIVERTED THROUGH THE ARRESTER TO EARTH
Lightning arrestor; Lightning diverter
A lightning arrester (alternative spelling lightning arrestor) (also called lightning isolator) is a device used on electric power transmission 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.