... ,SPD,Surge Arrester,surge protection,surge suppressor,Surge Protective Device ,circuit breaker,protective SPD,Surge Lightning Protector (surge suppressor/electrical surge) Detailed ... TT, TN-S, TN-S-C SystemStandard: IEC: 61643(Surge Arrester,surge protection,surge suppressor)surge protector1.Surge and overvoltage protection ... ,TT,IT 3.Rated voltage:380V MQU9-C Surge Protector 5KA-60KA