... 3,GB18802/IEC6164 Key words : Home Surge Protector(SPD) ,( surge protection device) SPD,Surge Protective Device,Metal oxide surge arrester,Surge ... application: DGM-type surge protector(hereinafter referred to as SPD)adapted to AC,mainly used for rated voltage not exceeding ... 1000V(RMS),200/380V,50/60Hz power supply system,not exceeding 1500V DC voltage of the circuit ...