Lightning Protection Equipment

Lightning is an Underrated Killer; Knowing Fact From Fiction Can Save Lives ...

/PRNewswire-USNewswire/ --  Because lightning is a common occurrence in most people's lives, this destructive force of nature does not get the respect it deserves, according to the Insurance Information Institute (I.I.I.).

In fact, every year, lightning strikes the ground 30 million times and injures about a thousand people in the U.S., according to the Lightning Protection Institute (LPI).

Lightning is not only deadly; it can be destructive to property. An analysis of homeowners insurance data by the I.I.I. found there were more than 213,000 lightning claims in 2010, up nearly 15 percent from 2009. These losses ranged from damage to expensive electronic equipment to structural fires that destroyed entire homes.

The I.I.I. puts the average lightning claim at , I.I.I.'s senior vice president and consumer spokesperson. "And the average person often confuses lightning myths with lightning facts."

According to the LPI, three of the most common lightning myths are:

Lightning never strikes the same place twice. Fact: Lightning often strikes the same place repeatedly, especially if it is a tall, pointy, isolated object. If it is not raining or if there are no clouds overhead, you are safe from lightning. Fact: Lightning often strikes more than three miles from the thunderstorm, far outside the area covered by the rain or even the thunderstorm clouds. Lightning rods attract lightning. Fact: Lightning rods DO NOT attract lightning. Instead, they provide a path to the ground for discharging the dangerous electricity.

To protect yourself from lightning, the I.I.I. and the LPI recommend the following key actions:

If you are outside with a thunderstorm approaching, seek shelter inside a building as soon as possible—ideally in a structure with a lightning protection system. If you hear thunder, then lightning is close enough to strike. Remember, if thunder roars, go indoors ! If a building is not available, take shelter in car with a metal roof and keep doors and windows closed. It is the metal frame of the car that protects you from lightning and not the rubber tires. Wearing rubber soled shoes will also not provide any protection. If there is no building or car in which to take shelter, try to minimize your risk by going to an area of lower elevation and staying away from bodies of water and trees.

Energy release and to release the power of lightning or over ...

Arrester, also known as: surge arrester, lightning or energy release and energy release of energy over-voltage power system operation, protection against transient voltage electrical equipment hazards, but also cut freewheeling, without causing system ground short circuit of electrical installations. Arrester is usually connected between live conductors and ground, in parallel with the protected equipment. When the voltage over the required operating voltage, the lightning immediate action, flow through the charge to limit over-voltage amplitude, protect equipment insulation; voltage normal, surge arresters and rapid restitution, to ensure the normal power supply. Horn arrester is the most primitive form of space, in the 19th century, used for overhead transmission lines to prevent lightning damage to equipment insulation caused power outages, it said, “arrester.” 20th century, 20 years, there has been arrester Shield aluminum Al, Al oxide arrester Shield and the pill-type Al arrester Shield. 30 years appeared Al tube arrester Shield. Al 50 years appeared silicon carbide arrester Shield. 70 Al appeared shield metal oxide arrester. Modern high-voltage arrester Shield Al, not only to limit the power system over-voltage caused by lightning, but also due to system operation to limit over-voltage generated. Substation equipment from lightning arrester lightning protection equipment shock attacks. Along the road when the shock wave passed over the substation lightning arrester protection level, the lightning first discharge, and a good conductor of lightning current through the introduction of the safety of the earth, using ground equipment to mine-voltage amplitude limit the impact of being below the level of lightning protection equipment, so that electrical equipment to be protected. Arrester according to the sequence of development can be divided into: the protection gap – is the simplest form of arrester; tube arrester – is also a protection gap, but it can discharge its own arc; valve arresters – is a single discharge space is divided into many short series gaps, while increasing the nonlinear resistance and improve the protection of property; magnetic blowing arrester – using a magnetic blow spark gap, improved breaking the ability, but also has a limited capacity of the internal over-voltage; oxidation arrester – zinc oxide using a valve volt-ampere characteristics of an ideal (non-linear high, that was in the high current characteristics of low resistance, limiting the voltage on the arrester, in the normal power frequency voltage was high resistance characteristic) , with no gaps, no continuous current residual depression, etc., but also to limit the internal over-voltage, is widely used.

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