a protective device for electrical equipment that reduces excessive voltage resulting from lightning to a safe level by grounding the discharge
A device used to pass large impulses to ground. It is vital that this device be placed upstream from the computer ground.
Protects lines, transformers and equipment from lightning surges by carrying the charge to ground. Lightning arresters serve the same purpose on a line as a safety valve on a steam boiler.
Any device designed to carry to the ground the short duration surge currents which appear on power lines and telephone lines during severe thunderstorms.