The 4 Major Causes Of Electric Motor Failure | Why Do ...
Jun 22, 2018· A 3% voltage unbalance causes an 18% temperature rise in the motor and a current increase of six to ten times the voltage unbalance. Phase voltage imbalance should be less than 1% for proper motor operation. If a motor must be operated with a phase unbalance greater than 1%, the motor should be derated.