DIN EN 60099-4-2010 电涌放电器.第4部分:交流电系统用无间隙金属氧化物电涌放电器
Surge arresters - Part 4: Metal-oxide surge arresters without gaps for a.c. systems (IEC 60099-4:2004, modified + A1:2006 + A2:2009); German version EN 60099-4:2004 + A1:2006 + A2:2009
This part of IEC 60099 applies to non-linear metal-oxide resistor type surge arresters without spark gaps designed to limit voltage surges on a.c. power circuits.