ABSTRACT
Surge arresters are shunt, nonlinear, resistive devices that are installed to limit transient overvoltages, thereby protecting equipment insulation. Sometimes they have been called “lightning arresters,” and this may be due to the fact that many years ago, surge arresters were tailored to protect against the surge front times typical of lightning. ey were much less eœective against steeper-fronted overvoltages, or against slow-front switching surges. However, the proper term is “surge arresters,” and the modern generation of metal oxide surge arresters is eœective against both lightning and switching surges.
