... . Programable, digital communication, various output functions.2. Measure and display three-phase voltage, three-phase current, active power, reactive power, power factor. frequency and four-phase ... , height above sea level≤2500mIsolation withstand voltageInput and power supply>2kV, input and output >2kV, power supply and output>1.5kVInsulation resistance≥5MΩDimensions (unit ...