... series VFD uses new type of IGBT with advanced microcomputer control.High-High voltage resource VFD, direct 3, 3. ... very small common mode voltage and dv/dt. Integrated microcomputer control and self-diagnosis ability. VFD displays detailed failure message ... Compressor. Oil & Gas: Oil transferring pump, Water injecting pump, Electric submersible pump, Water Pump, Compressor. Cement: Pre-heater fan, ...