NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION

Welcome to the NEMA Medium and High Voltage Surge Arrester Section homepage. This website is offered as a service by NEMA and our member companies. The purpose of the website is to provide information to end-users on the general understanding, selection, and application of metal oxide varistor (MOV) type surge arrester protection... Surge arresters are designed to protect valuable equipment from overvoltages on the power system network. Without surge protection the equipment insulation will suffer damage. The purpose of the surge arrester is to limit the voltage on the system while providing a low-resistance path to ground for the surge current. The information on this site applies to arresters applied on AC systems larger than 1 kV... The surge arrester industry has evolved over the past 50 years. Advances have been made in both the level of surge protection provided as well as the incorporation of new safer housing materials and improved construction methods. This has been..

Also known as: NEMA Arresters