Not all surge arresters protect systems from lightning. While lightning current arresters (Class 1) are used to protect against direct lightning surge currents, surge arresters (Class 2) protect equipment from induced surges in electrical wiring. Surge arresters and lightning current arresters from DEHN offer reliable protection against these hazards. And there are many kinds of surge arresters such as Distribution Surge Arrester, Station Surge Arrester, Line Surge Arrester, etc. http://www.jnearrester.com/metal-oxide-varistor/5ka-varistor/