1.professional surge protector for ac power 2.working voltage: 220V /380V AC 3.1,2,3, ... .ISO9001 5.8 years experience 3 Level Power-supply Module (4P,3P+NPE) surge protector for ac power 1. Third level protection2. install in the ... , simple maintenance, module degradation indication, automatic switching off at exit failure and recovery, do not affect the normal power supply. Technology Parameter:Model ...