... :DGM-type surge protector(hereinafter referred to as SPD)adapted to AC,mainly used for rated voltage ... the circuit and equipment of the Surge Protection.SPD has a phase to phase(L-L),phase ... ns)DGM3-B30220/380275/320385/4203060.2.2≤25Technology SPD parameter(Note:According to user requirement ,can be ... 140V,440V,550V,voltage range of range of the SPD):Type No.Rated Voltage(V) UnContinuous Voltage Uc ...