1.professional surge protector for ac power 2.working voltage: 220V /380V AC 3.1,2,3,4P(+NPE) 4.ISO9001 5.8 ... years experience 3 Level Power-supply Module (4P,3P+NPE) surge protector for ac power 1. Third level protection2. install in ... -PE N-PEFailure and Releasing Indication YesYes Size: 3 Level Power-supply Module (4P,3P+NPE)surge protector for ac power