Core idea: Surge arresters limit transient overvoltages by conducting surge current to ground before equipment insulation is overstressed. Engineering use: They protect transformers, line entrances, switchgear, cable transitions, and overhead equipment from lightning and switching. A surge arrester is a protective device for limiting voltage on equipment by discharging or bypassing surge current. An arrester does not absorb lightning or. A Surge Arrester (also called lightning arrester or surge protective device, SPD) is an essential protective device used in power transmission and distribution systems to protect equipment — such as transformers, switchgear, and bushings — from damaging overvoltages caused by lightning strikes and. Fiber optic lightning arresters are devices that protect fiber optic communication systems from transient damage caused by lightning and overvoltage., lightning) (or) internal (switching event) constraints.
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