Measuring supraharmonic is important, but reducing must be the goal!

More and more modern power analyzers cover the frequency range above the “classic” harmonics up to 2.5 kHz for power quality measurements. Today it is already a quasi-standard to measure and analyze voltage levels at least up to 9 kHz or even higher. In our daily network analyses, we see a rapid increase in interference levels at frequencies up to 20 kHz! Chargers in electromobility, converters with their clock frequencies, lighting equipment and many other consumers feed in their interference emissions at increasingly higher frequencies.

Supraharmonic measurement is an important measure, but it is the lowering of voltage levels that eliminates the problem. This is because superharmonics cause malfunctions of control systems, failures of electronic components, noise and much more.

This is where the universal broadband module PQE UBM from PQ ENGINEERING comes into play: The UBM filter module from the PQE hMF line filter modular system reduces superharmonics up to 20 kHz, attenuates resonance points and filters common-mode and push-pull interference from the supply network. The compact design and low losses facilitate retrofitting and integration into active filter cabinets.


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