This paper discusses the elimination of harmonic currents in the industrial power system utilizing adjustable speed drives. The harmonic current pattern measured and simulation results will be compared to IEEE-Std 519-2014. ASD can generate harmonic currents caused by front-end or input rectifier which tends to draw in the form of non-sinusoidal currents and not continuous. Based on the measurement data THDi value reached 686.53%, IRMS at 928.75A and Ifund at 1285.6 A in one phase. Although the value THDi once installed filters still shows the %THDi value above the standard allowable value, this may be evidence that the LC filter can be used to eliminate harmonic currents on adjustable speed drives.