... etc, is suitable for the single-phase AC active electric energy with rated frequency of 50 Hz. The performance is ... in conformity with the technical requirements for single-phase electronic watt-hour ... Larger than 0.4%Ib. (Power factor:1).Running with no-load. The meter use logic circuit to be ... 2.5(10),5(20),5(30),10(40),10(60),15(60),20(80),30(100) Rated voltage(V) ...