... -creep 2.IEC 1036 international standard 3.RS485 output interface Good quality watt meter digital single phase Product brief introduction The DDS3666 ... life etc, is suitable for the single-phase AC active electric energy with rated frequency of 50 Hz. The performance is ... .5(6),2.5(10),5(20),5(30),10(40),10(60),15(60),20(80),30(100) Rated voltage(V ...