... energy and 4-quadrant energies, harmonic and quality of electrical network analysis, 4 logic inputs, 3 relay outputs and RS485 ... system.2. Characteristics1, Measuring accurately the data of three phase network, such as phase voltages, line voltages, current, active, reactive ... current unbalance etc.., and users can analyze the electrical network quality with these data;4, It can be equipped 4 logic ...