Rail-type single-phase watt-hour meter

features 1, active energy metering, long-term work is not to adjust; 2, using ADE7755 special measuring chip; 3, using the latest embedded digital multiplier foreign power application specific integrated circuit, greatly increased the instruments dynamic range, the actual overload up to 10 times more; 4, at 5% Ib Imax good within the error of linear; 5, external components, low power consumption, meter, simple structure; 6, meter all the elements are optional long-life, high reliability electronic components, and thus has a long life and high reliability characteristics; 3, specifications and main technical parameters 1, Rated current (A): 2.5 (10), 5 (20), 5 (30) 10 (40), 15 (60), 20 (80) 2, rated voltage (V): 220,230 3, rated frequency (Hz): 50,60 4, the accuracy class: 1, 2