... integrated circuit,and adopts SMT process. General:Type DTS557 Three-phase watt-hour meter applies Large-scale special integrated circuit, ... Accuracy (class)DTS5573X57.7V/100V1.5/6, 3/6A1.0DTS5573X220V/380V1.5/6, 3/6, 5/20, 10/40,15/ ... 60,20/80, 30/100A1.0DTS5573X100V1.5/6, 3/6A2.0DTS5573X380V1. ... 5/6, 3/6, 5/20, 10/40,15/60 ...