판매완료:  2020년05월21일. 

Current harmonics caused by home appliances are measured and evaluated up to the 40th harmonic (2 kHz for a linefrequency of 50 Hz) according to EN 61000-3-2 and -12. For frequencies of 9 kHz and higher the common EMC standardsapply. The frequency range from 2 kHz to 9 kHz is, however,to a large extent not standardized so far. Distortions in this frequency range originate for example from decentralized
sustainable energy sources such as photo voltaic or wind power stations. Therefore these effects in the frequency range from 2 kHz to 9 kHz are already existent and will certainly increase in future, necessitating appropriate measurement methods.
The standard EN 61000-4-7, Annex B, describes a process to measure the parts of the signal above the 40th harmonic and to cluster the output. In summary, the standard stipulates the fulfillment of the following points: