With rising cost of energy and environmental concerns, energy saving is need of the hour. In order to reduce operating cost installation of variable frequency drive on variable load is proven energy saving measure. VFDs in market are generally based on six pulse rectification topology. Due to the fact that these VFD’s convert frequency to change speed, generation of harmonics cannot be avoided. Losses associated with harmonics increases apart from other issues like premature failure of motors, nuisance tripping of circuit breakers are also common. Case study below presents how a cement plant overcame these issues by mitigating harmonics using harmonic filters. The cement plant not only reduced harmonics, but also reduced losses associated with harmonics.