Applies to metal-oxide surge arresters designed to repeatedly limit the voltage surges on 48 Hz to 62 Hz power circuits (1000 V) by passing surge discharge current and automatcially limiting the flow of system power current. Applies to devices for separate mounting and to those supplied integrally with other equipment.
ANSI/IEEE C62.11:2005 history
2005ANSI/IEEE C62.11:2005 Standard for Metal-Oxide Surge Arresters for AC Power Circuits (> 1 kV)