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6952 HB Dieren


Waltec Elecronic Engineering

Project information 

Universal motors have a winding isolation that is designed for maximum voltage of  700 Volts.

When connecting this motor to a Frequency inverter with a long motor cable the surge voltages can easily become >1000V

Below are pictures of a damaged motor winding due to voltage surges induced by long motor cable.

Motor Surge filter         

Isolation damage due to voltage surges