3 Phase/single phase Electronic Multifunction Energy Meter

Three phase EEM MAIN CHARACTERISTICS: *Can measure four-quadrant energy, bilateral active energy, reactive energy and demand.Data can be saved for three months.* Measuring whole real-time power parameter, displaying 32 times harmonic wave.*Can do calculating compensation potential/current transformer error.* Meter has powerful event log function. Meter could record the time of phase failure,no-voltage, excess pressure, missing current, antiphase, current unbalance,over load, adjustment meter, timing, programming, demanding clear, total clearand so on.* Load profile can record several different parameters, could save 30 days data within30min interval.*Perfect self-inspection and abnormal alarming function.* Using the latest international BMC compound material as panel. MAIN FUNCTION: * Coulometric Calculating: Calculating active/reactive coulomb by A/D converter.Pulse show on the panel.*Record of Demanding: Interval demand and slip demand*Final Estimate Function:  Offer three kinds of data to balance current data??justbalanced data??last balanced data. * Record of Missing Potential: The LCD displays the according phase, and recordsthe total time of each phase??s missing potential respectively.*Current Qualification Rate: Recording performing current, over upper limit time,under lower limit time, the whole time, and calculating qualification rate. *Billing Function: Measuring energy at specified time intervals corresponding tofour different tariffs includes active energy (Delivered, Received), reactive energy(inductive load, condensive load, four-quadrant). DDSD 720/721 Single Phase Multifunction EEMGENERAL DESCRIPTION:DDSD 720/721 Single Phase Electronic Multifunction Energy Meter has functions ofelectric energy time-sharing measuring, displaying, storing, infrared & long-distancereading/programming. FEATURES:Time-sharing Measuring: Measuring energy at specified time intervals correspondingto three different tariffs (includes peak value, normal value and valley value).Reliable Memory: Nonvolatile memory saves data for at least 20 years.Convenient Data Recording: Palmtop computer infrared or RS485 long distance datarecording and programming.Long Life.Low Power Consumption.Wide Line Ranges: 5%??500% current ranges.Powerful Overload: The meter??s max rated current is 100A.Reliable Running.MAIN SPECIFICATIONS:Accuracy: Class 1.0, Class 2.0 Rated Current: Direct switch-in: 5A(20A), 5A??30A??, 10A??40A??, 20A??80A??, 30A??100A??.Mutual??inductor switch-in: 1.5A??6A??, 3A??6A??Rated Voltage: 220VFrequency: 50HzTime Accuracy: ??0.5s/dWorking Temperature Ranges: -25?