Motor Protection Options
Drive motors often play a decisive role in the success of a production process. Motor breakdowns frequently result in damage to driven equipment and production shutdowns. The resulting cost significantly exceeds the cost of repairing the motor. Optimum design of the motor protection ensures that damage from thermal overload is minimized with little reduction in service life. Secondary faults are minimized in the event of short circuits, ground faults and winding faults. The spectrum extends from small medium-voltage motors with an output of a few hundred horsepower to large medium-voltage motors with outputs measured in thousands of horsepower. Protection system design must be based on the rating of the motor, the importance of the drive for the technological process, the operating conditions and the requirements of the motor manufacturer.