A new edition of IEC 60099-4 has been published by the International Electrotechnical Committee. IEC 60099-4 applies to “Surge arresters – Part 4: Metal-oxide surge arresters without gaps for a.c. systems.” The new edition is available for purchase on the IEC’s website.
Description*
“IEC 60099-4:2014 applies to non-linear metal-oxide resistor type surge arresters without spark gaps designed to limit voltage surges on a.c. power circuits with Us above 1 kV.”
*Description from the IEC Website
