1.Measure 3U,12I etc. 2.LCD display 3.RS485 port,Modbus protocol 4.DO+DI Model Descriptions for ... current, power, power factor, energy in three circuits, with 3DI+1DO.With split-type transformerYD2080-2KThree-phase voltage, frequency in one ... current, power, power factor, energy in four circuits, with 3DI+1DO.With split-type transformer Electrical Characteristics Measuring Accuracy Type of ...