The converter supplying the motor must have the following classification U (f):
where: U – rated voltage of the motor operation; f – frequency 105/110Hz

If the recommendations are not followed, the motor current increases disproportionately and the drive motor does not reach the rated speed. Under no circumstances should the frequency (rotational speed) be set higher than the 100Hz frequency stated on the nameplate, because the motor may be overloaded or the fan damaged due to too high speed. The so-called boost, as this causes the drive motor to heat up too much. In order to protect the drive motor, a temperature sensor must be connected to the corresponding inputs of the converter.