... integrated circuit,and adopts SMT process. General:Type DTS557 Three-phase watt-hour meter applies Large-scale special integrated circuit,and ... requirement of the user, we can offer the special specifications meters.Accuracy(Class): 1Rated Voltage: 220VRated Current: 1.5/6A, 2 ... , 10/40A, 15/60A, 20/80A, 30/100A DTS557 three-phase electronic watt-hour meter