Motor reactors reduce the voltage load on the motor windings by reducing the voltage gradients at the motor terminals that occur during converter operation. At the same time, the capacitive charge/discharge currents that place an additional load on the converter output when long motor cables are used, are reduced. For group drives, output reactors should always be used. The maximum permissible output frequency when a motor reactor is used is 150 Hz.

The motor reactor must be installed as close as possible to the Motor Module or Power Module. Up to two motor reactors can be connected in series.

Motor reactors are approved for use only in conjunction with Vector and V/f control modes.

For additional notes on the use of motor reactors, please refer to the SINAMICS Low Voltage Engineering Manual.