... overvoltage protection 2.Apply to the power supply such as TN-S,TN-C,TT,IT 3.Rated voltage:380V surge protector1.Surge ... overvoltage protection 2.Apply to the power supply such as TN-S,TN-C,TT,IT 3.Rated voltage:380V SP2 SPD,Surge ... : -40 ~80Altitude (max): 2,000mProtection Class: IP20Applied to TT, TN-S, TN-S-C SystemStandard: IEC: 61643(Surge Arrester,surge protection,surge suppressor ...