... with advanced microcomputer control.High-High voltage resource VFD, direct 3, 3.3, 4.16, 6, 6.6 ... , 10, 11 kV input, direct 3, 3.3, 4.16, 6, 6.6, ... VFD will fly start. VFD checks motor speed automatically and trace the speed to fly start again without impact. Flying ... accurate protection. The basic protection includes over voltage, over current, low voltage, phase loss, over load, over heat, ...