protect electro pumps bearings from electric current flow (case study: recycling electro pump of dissolved air floatation in desalination plant)

Cause of using variable frequency drives induce capacitively coupled shaft voltages in the electric motors, motors with variable frequency drives can lead to complex shaft voltages and bearing currents. within an electric motor, many parts have electrical failure problems, and in the meantime, bearings are the most sensitive and vulnerable components, in this article we explain this problem had occurred in recycling electro pump of dissolved air floatation in desalination plant.