Surge Arrester
            Medium- and high-voltage surge arresters are the primary protection against atmospheric and switching over-voltages.
Products
 include surge arresters used in medium- and high-voltage AC and DC 
power systems, gaps not inherently self-clearing, capacitors of the type
 generally used for protection against lightning, and resistors designed
 to protect from lightning or other abnormal voltages to circuits or 
equipment associated therewith.
Participation
 in the development of technical documents and engagement with other 
national and international organizations ensure NEMA Members' alignment 
with industry-backed efforts that impact the surge arresters market and 
create market demand through continued education and training of 
customers.