EN61643-11 Protection class C AC 50Hz/60Hz (UC):255V--440V Manufacturer ,OEM offered SPD)lightning protector surge protection deviceApplication:CHT1 series surge protection device suit for the AC 50Hz/60Hz . for the TT. TN-S . TN-C .and IT .not over 380V . It is used to protect the direct or indirect thunder influence or oher instantaneous over-voltage surge . This protect is mainly used in house ...