DDS228 single phase electronic energy meter (hereinafter referred to as the power meter) the U.S. ADI's single-phase energy metering chip ADE7755 and advanced SMT and wave soldering process, according to the user's actual electrical conditions in the design, manufacture a new type of energy meter. All the technical requirements of the energy the table conform GB/T17215.321-2008 Level 1 and 2 Static AC Active energy meter "and international standard IEC1036-1996. Has good resistance to electromagnetic interference, low consumption of energy-saving, high-precision, anti-theft, high overload, long life characteristics. Second, Specifications and main technical parameters 1, Model Specification Model accuracy level reference voltage Un Rated the current Ib instrument constant imp / kWh way DDS228 1 or 2 220VAC 50/60Hz 2.5 (10) A 6400 LCD display or counter. Display 5 (20) A 3200 10 (40) A 1600 20 (80) A 800 2, Basic error limit load current power factor COSφ Basic error limit (%) 1 2 0.05Ib 1.0 ± 1.5 ± 2.5 0.1Ib- Imax on ± 2.0 0.1Ib 1.0 ± 1.0 0.5 (inductive) 0.8 (capacitive) ± 1.5 ± 2.5 0.2Ib-Imax 0.5 (inductive) 0.8 (capacitive) ± 1.0 ± 2.0 Note: Ib calibration current, Imax maximum current. 3, starting at the reference voltage, the Senate than frequency and COSφ = 1.0 conditions, the load current is 0.004Ib (1) energy meter should be continuous measurement of electricity consumption. Creep voltage circuit plus 115% of the rated voltage and current of the current line, within the specified time the test output of the instrument should not produce more than one pulse. 5, the normal operating voltage of the voltage range: 0.9Un-1.15Un limit working voltage :0.75-1 .2 Un 6, power consumption voltage line power consumption: ≦ 1W 4VA current line-power: ≦ 1VA 4.7 climatic conditions normal operating temperature: - limit of 35 ℃ ~ +60 ℃ Operating Temperature: -40 ℃ ~ +70 ℃ storage and transport temperature: -25 ° C to +70 ° C Sales Hotline :0577 -6,298,677,113,757,772,139 Contact: Zhu micro