surge arrester applied for single-phase,three-phase surge protection under various power supply system through different combinations.Applicable for B,C,D class protection,it adapts to LPZ1-LPZ2 LPZ3 lightning protection area.    Rated voltage Un (V~)220/380Continuous voltage Uc (V~)275/320385/420Standard discharge current  In(KA)10 8/20µSMax current capacity Imax(KA)20 8/20µSResponse time (ns)< 25Protection level< 1.4/1.5< 1.8/1.9

surge arrester