BS IEC 60099-6:2019 - Page 3

Surge arresters. Surge arresters containing both series and parallel gapped structures. System voltage of 52 kV and less | Status: Current

1 Scope This part of IEC 60099 applies to non-linear metal-oxide resistor type surge arresters with spark gaps designed to limit voltage surges on AC power circuits with system voltages Us above 1 kV up to and including 52 kV. This document basically applies to all metal-oxide distribution class surge arresters with internal series and/or parallel gaps and housed in either porcelain or polymeric housings.