DANSK DSF/IEC TR 61000-1-4 ED2 PDF

This part of IEC 61000, which is an IEC technical report, reviews the sources and effects of power frequency conducted harmonic current emissions in the frequency range up to 2 kHz on the public electricity supply, and gives an account of the reasoning and calculations leading to the existing emission limits for equipment in the editions of IEC 61000-3-2, up to and including the fifth edition (2018) with Amendment 1 (2020), and in the second edition of IEC 61000-3-12 (2011). The history is traced from the first supra-national standard on low-frequency conducted emissions into the public electricity supply, EN 50006:1976 and its evolution through IEC (60)555-2 to IEC 61000-3-2, IEC TR 61000-3-4 and IEC 61000-3-12. To give a full picture of the history, that of the standard for the measuring instrument IEC 61000-4-7 is mentioned as well. NOTE – All IEC standards were renumbered in the 60000 series from 1998-01-01. To indicate the references of standards withdrawn before, or not reprinted after, that date, the '60x' prefix is here enclosed in parentheses. Hence 'IEC (60)555-2'. Some concepts in this document apply to all low voltage AC systems, but the numerical values apply specifically to the European 230 V/400 V 50 Hz system.