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What harmonics are most prevalent in todays electrical systems?

April 26, 2017electrical harmonics prevalent SYSTEMS today

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What harmonics are most prevalent in todays electrical systems?

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The loads that we place on our systems today are computers, laser printers, video monitors, electronic ballasts, variable speed drives and ups. Loads that are connected phase to neutral ( equipment typically plugged into a wall receptacle) produce an abundance of 3rd, 5th and 7th harmonic currents. Phase to phase and three phase loads ( variable speed drives for example ) that are 6 pulse produce mostly 5th and 7th harmonics.