Submersible electric machine

A submersible electric machine for transporting a pumped liquid, the submersible electric machine comprising:

• a hydraulic unit comprising an impeller configured to propel the liquid;
• a drive unit comprising:
• a drive unit housing defining a liquid-tight motor compartment separated from the pumped liquid,
• an electric motor arranged in the motor compartment,
• a drive shaft connected to the electric motor, extending from the electric motor to the hydraulic unit, and connected to the impeller;
• a top unit comprising:
• a top unit housing defining an electronics chamber with a dividing structural wall, the dividing structural wall separating the electronics chamber from the motor compartment;
• a metal partition, arranged in the electronics chamber and connected to the top unit housing, having a natural frequency equal to or more than 500 Hz, the metal partition arranged to divide the electronics chamber into a high voltage section and a low voltage section, the high voltage section housing the terminal block and located intermediate the motor compartment and the low voltage section;
• and
• a vibration sensor mounted in the low voltage section and directly or indirectly connected to the metal partition, the vibration sensor configured to monitor vibrations transmitted through the metal partition in at least two dimensions and at frequencies ranging up to 500 Hz.