CE, ISO9000 certification 3 phases, 380V AC 5.5~7.5KW inverter VVVF control, constant,vairable ... torque mode VD4 series3 phases, 380V AC 5.5~7.5KW invertersVD4-45P5Suitable motor: 5.5KW, rated ... be selected.digital output channelProgrammable open-collector output,1 channel; relay output signal ,1 channelDigital panelLED Displayindicate parameters: frequency ,output ...