... protection 2.Apply to the power supply such as TN-S,TN-C,TT,IT 3.Rated voltage:380V surge ... protection 2.Apply to the power supply such as TN-S,TN-C,TT,IT 3.Rated voltage:380V SP2 ... ~80Altitude (max): 2,000mProtection Class: IP20Applied to TT, TN-S, TN-S-C SystemStandard: IEC: 61643(Surge Arrester,surge protection,surge ... 2.Apply to the power supply such as TN-S,TN-C,TT,IT 3.Rated voltage:380V MQU9- ...