... use large-scale integrated circuit, high reliability step motor, it can meter the AC single-phase active energy (voltage rating: 220V; frequency 50Hz ... easy to be managed.Main technical parameter Precision grade: 1.0, 2.0 Conform to standard: GB/T17215-2002Reference temperature: 23°CLimit ... current) (A)220501.5(6),2.5(6), 3(6),5(20),10(40),15(60),20(80),30(100) single phase electronic energy meter