... control.High-High voltage resource VFD, direct 3, 3.3, 4.16, 6, 6.6, 10, 11 kV input, direct 3, ... remote control; Communication protocols, such as Modbus, Profibus, TCP/ IP, DeviceNet, etc. Torque characteristics: VFD can output constant rated torque ... accurate protection. The basic protection includes over voltage, over current, low voltage, phase loss, over load, over heat, earth fault, and short ...