22-08-2016, 12:00 PM
hii I am Deepak I would like to get difference beetwin long flashover arrester and lightning arrester
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lightning arrester
A lightning arrester is a device used on electrical power systems and telecommunications 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. When a lightning surge (or switching surge, which is very similar) travels along the power line to the arrester, the current from the surge is diverted through the arrestor, in most cases to earth.
In telegraphy and telephony, a lightning arrestor is placed where wires enter a structure, preventing damage to electronic instruments within and ensuring the safety of individuals near them. Smaller versions of lightning arresters, also called surge protectors, are devices that are connected between each electrical conductor in power and communications systems and the Earth. These prevent the flow of the normal power or signal currents to ground, but provide a path over which high-voltage lightning current flows, bypassing the connected equipment. Their purpose is to limit the rise in voltage when a communications or power line is struck by lightning or is near to a lightning strike.
If protection fails or is absent, lightning that strikes the electrical system introduces thousands of kilovolts that may damage the transmission lines, and can also cause severe damage to transformers and other electrical or electronic devices. Lightning-produced extreme voltage spikes in incoming power lines can damage electrical home appliances or even produce death.
long flash over arrester
The Flash is an American TV series, and a modern retelling of the DC Comics series, The Flash. The show is a spin-off of Arrow. The series premiered on October 7, 2014, airing at 8pm.
Originally, the twentieth episode of Arrow's second season was going to act as a backdoor pilot, and were it popular enough the series would be greenlit. However, after executives from The CW Network saw "The Scientist" and "Three Ghosts", Barry's premiere episodes on Arrow, they made the call to order the series straight to pilot. On May 8, 2014, The Flash was picked up to series. On October 21, 2014, The Flash was green lighted for a full season by the CW, extending from 13 episodes to 23. The Flash was renewed for a second season on January 11, 2015. On March 11, 2016, The CW renewed The Flash for a third season.
Grant Gustin portrays Barry Allen/The Flash in the eponymous lead role. The series is written by Greg Berlanti, Andrew Kreisberg and Geoff Johns.