... type DDS877 , DDS48 type electronic single phase energy meterApplication : DDS877 , DDS48 type electronic single phase energy meter is the most advanced static ... large-scale integrated circuit, high reliability step motor, it can meter the AC single-phase active energy (voltage rating: 220V; frequency 50Hz ... (20),10(40),15(60),20(80),30(100) single phase electronic energy meter