High efficiency harmonic filters are required in modern electrical systems, especially in premises of high technology with rapidly varying loads. These filters are designed for eliminating the destructive harmonic currents that are generated by non-linear loads inverters and rectifiers which leads to overheating and failure of the equipment and higher energy expenditures. With the use of these high efficiency harmonic filters, the clients power factor can be enhanced while the energy wasted can be reduced to an acceptable a minimal level and the requirements of the regulating authorities are met and this translates to a cheaper and environmentally friendly operation.