Talk:Lightning arrester

Should safety be mentioned in the main article ?

At first glance it seems the topic of lightning arresters, a subset of the wikicategory "Electrical Safety," would at least mention safety. Lightning strikes can have many byproducts, like electric overvoltage, overstress, over-current, surge, flash-over, arc-over, side-flash, explosion, fire, electromagnetic interference, and electromagnetic pulse, some of which can destroy insulation, but can also affect personnel safety and devices and equipment.

Electrical engineering references however often mention just the protection of insulation and equipment. I guess since arresters deal with non-destructively managing lightning current and lightning's effects closer to points of entry to electrical transmission or distribution systems, the primary concern cited is the protection of insulation from flash. Air terminators, gas discharge devices, metal shielding structures, roof mesh systems, equipotential bonding systems (ensuring metal parts don't have different voltages with respect to each other), and prudently-distanced cable and conductor routing, etc., are used firstly for protection of the electric energy delivery system. These are the first line of defense.

And as lightning effects travel down the transmission line toward the end points -- structures and buildings inhabited or used by people -- mitigation of the effects may be more specific to the traveling surge itself, which can still be of a magnitude to spark, arc, flash over, or side-flash. This secondary collaborative defense then may be the function of surge protection devices, e.g., transient voltage protectors, metal oxide devices, series mode suppressors, used with and in electrical equipment and devices being protected, but may also include some protective solutions mentioned in the paragraph above.

The ideal arrester deals with the overvoltage and current quickly, normalizes quickly, and does not degrade. DonL (talk) 06:23, 6 September 2010 (UTC)

Inclusion in Surge Protection Devices?

To my understanding, a Lightning Arrestor provides two functions;

• direction stroke termination protection of transmission/distribution systems--> usually results in destruction of arrestor necessitating replacement,
• induced current (transient voltage) isolation & routing to earth.

It is primarily used in electric power supply distribution systems (transmission & local distribution) and in such manner is an over-sized SPD, although "Lightning Arrestors" were developed prior to SPD/TVSS/etc designed for residential/commercial/light industrial applications.

I suggest its inclusion as a subcategory of the Surge protector page where lightning characteristics are described relevant to lightning arrestors. Borealdreams (talk) 15:08, 12 March 2012 (UTC)

Copyright problem removed

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