Conducted emissions in the 2kHz -150kHz band Supra-harmonics

2 KHz-150 KHz High Frequency power quality measurement

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PQube3- HF-PQ

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A new threat to grid operators: 2kHz-150kHz emissions, or “Supra- harmonics”, can burn capacitors, knock out communications and even foul up revenue meters. The biggest single source? Emissions from photovoltaic inverters. Some wind turbines, fuel cells, battery chargers can also be significant sources. Supra-harmonics also affect street lighting controls, household dimmers, semiconductor manufacturing equipment, medical scanners, security systems and transportation controls.