... microprocessors, high integration, functions strong, fast. Three phase current, voltage AC sampling, perfect measuring and controlling functions.Small size, under- ... input: ~380V(direct measuring),~100V(PT measuring).1.2 AC current: 1~200A.1.3 Rate frequency: 50Hz.1.4 ... Power supply: AC/DC220V,AC/DC110V.2. Main specifications2.1 Accuracy: the measuring error of protective current, voltage does not ...