A device for suppressing harmonic distortions at the output of variable frequency drive (VFD) comprising at least one passive harmonic filter (PHF) which has a set of storage elements and a set of inductive elements. The set of inductive elements are mounted on a magnetic core. The PHF comprising at least two lines connected in parallel (parallel lines) with similar sets of elements. The described technical solution expands the possibility of operating the VFD/VSD with different supply voltage frequencies, and maintains the THD/TDD values within 5% regardless of active power fluctuations.