... Lightning Surge Protector,Surge Protecton Device,Lightning Protection,Distribution Surge Protection,Lightning Arrester and so onProduct introduce and application:DGM-type ... non-linear components and low residual voltage,small discharge current,modulus,and using safely and reliablely,designed ... SPD parameter(Note:According to user requirement ,can be customized Uc=140V,440V,550V,voltage range ...