... , IEC III rank 4.Customizable,OEM&ODM Introduction1.Specification 3-phase Measure voltage current, active power, reactive power, power ... 1 isolated RS485 or RS232( 3 wire) ,1 isolated RS485 MODBUS RTU harmonic calculation 2.Parameters Analog input 2 Channel ... Voltage, current, active power, reactive Power of each phase, 3 Phase Power, 3 Phase reactive Power, Power Factor, Frequency and etc.. Voltage ...