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Powerline worker performs maintenance of a lightning arrester on an electrical transmission tower in New Brunswick, Canada. A lightning arrester (alternative spelling lightning arrestor) (also called lightning isolator) is a device, essentially an air gap between an electric wire and ground, used on electric power transmission and telecommunication systems to protect the insulation and ...
A lightning arrester is a device, essentially an air gap between an electric wire and ground, 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.
However, a direct lightning strike (such as on a radio tower antenna) will cause the shunt to arc and conduct the massive amount of electricity to ground, protecting transmitters and other equipment. Another older form of lightning arrester employs a simple narrow spark gap, over which an arc will jump when a high voltage is present.
It necessitates the test of surge immunity in electrical or electronic equipment. IEC 61000-4-5 defines test set-up, procedures, and classification levels. In particular, it standardizes the required surge voltage and current waveforms for laboratory testing, with the "1.2/50-8/20 μs" impulse being the most frequently used surge waveform.
Polymer and porcelain insulators and arresters used in the transmission, substation, and distribution markets. Designs include suspension, station, and line post, as well as polymer insulator and arrester combinations for lightning protection. Bryant Electric Company: Bridgeport, Connecticut, United States: 1991 [12] Bryant Electric Company
In the event of a surge, a lightning arrester, a surge arrester or a surge protection device (SPD) will divert the excess current to the Earth before it reaches an appliance. [4] System earthing allows for equipotential bonding to all metal works to prevent potential differences between them. [5]
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