ddsy722

... to EN62053-21 Accuracy class 1,2 Frequency 50/60Hz DDSY722 type Single-phase electronic prepaid watt-hour meter 1.Product ... Brief IntroductionThe DDSY722 type single-phase electronic pre-paid watt-hour meter is ... selling and using control.- Expansible RS485 3.Main Technical Data DDSY722 type Single-phase electronic prepaid watt-hour meter