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1. (n.) lightning arrester
a device for preventing damage to radio, telephonic, or other electric equipment from lightning or other high-voltage currents.
Etymology: (1770–80, Amer.)
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| Definition of 'lightning arrester' |
Princeton's WordNet |
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1. (noun) surge suppressor, surge protector, spike suppressor, spike arrester, lightning arrester
electrical device inserted in a power line to protect equipment from sudden fluctuations in current
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| Definition of 'lightning arrester' |
The Standard Electrical Dictionary |
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1. lightning arrester
An apparatus for use with electric lines to carry off to earth any lightning discharge such lines may pick up. Such discharge would imperil life as well as property in telegraph offices and the like.
Arresters are generally constructed on the following lines. The line wires have connected to them a plate with teeth; a second similar plate is placed near this with its teeth opposite to those of the first plate and nearly touching it. The second plate is connected by a low resistance conductor to ground. Any lightning discharge is apt to jump across the interval, of a small fraction of an inch, between the oppositely placed points and go to earth.
Another type consists of two plates, placed face to face, and pressing between them a piece of paper or mica. The lightning is supposed to perforate this and go to earth. One plate is connected to the line, the other one is grounded.
The lightning arrester is placed near the end of the line before it reaches any instrument. (See Alternative Paths.)
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Definitions of lightning arrester 
