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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.
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]
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.
Owning a home is by no means inexpensive. In addition to paying a mortgage, you have to cover the cost of property taxes, insurance, and maintenance. And given the rise in home prices over the ...
The ground reference for all equipment inside the area being protected is separate from the halo. The halo is connected to the main building ground, which may include an underground ring ground outside the building, with vertical conductors especially in the corners of the building.
A middle school cheerleader in Tennessee was stabbed to death by a 15-year-old boy — and now prosecutors are aiming to try him as an adult. Savannah Copeland, a 13-year-old...
Manchester City's head coach Pep Guardiola leaves the pitch after the English Premier League soccer match between Brighton and Manchester City at Falmer Stadium in Brighton, England, Saturday, Nov ...