IEC 60099-6 pdf download Surge arresters – Part 6: Surge arresters containing both series and parallel gapped structures – Rated 52 kV and less 1General1.1scope This part of lEC 60099 applies to non-linear metal-oxide resistor type surge arresters withspark gaps designed to limit voltage surges on a.c. power circuits. This standard basically applies to all metal-oxide surge arresters with gaps...