... Voltage resource VFD, direct input of3,3.3,4.16,6,606 and 10 kV,direct output of 3, ... 4.16, 6,6.6 and10 kV,no output transformer necessary. High input power factor, low harmonic ... filters required.2. Sinusoidal multi-level PWM output waveform, no output filter required, can be directly connected to ... or the vanes,with the maximal length of the output cable of 1000m.3. Friendly human-machine interface. ...