电磁兼容性（EMC）.第1-4部分:总则.频率范围小于等于2 kHz的设备工频传导谐波电流发射限制的历史原理

[中文适用范围]： 本部分是关于电磁兼容（EMC）的技术报告，回顾了频率范围高达2 kHz的电源频率传导谐波电流发射源及其对公共电力供应的影响，并提供了导致现有设备发射限值（截至IEC 61000-3-2第5版（2018）及其修正案1（2020），以及IEC 61000-3-12第2版（2011））的推理和计算。该历史追溯到关于低频传导发射到公共电力供应的第一个超国家标准EN 50006:1975及其在IEC (60)555-2、IEC 61000-3-2、IEC TR 61000-3-4和IEC 61000-3-12中的演变。为了提供完整的历史画面，还提到了测量仪器标准IEC 61000-4-7的历史。本文档中的某些概念适用于所有低压交流系统，但数值具体适用于欧洲230 V/400 V 50 Hz系统。 [外文原描述]： IEC TR 61000-1-4:2022 which is a 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. The history is traced from the first supra-national standard on low-frequency conducted emissions into the public electricity supply, EN 50006:1975 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 starting from 60000 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 To indicate the references of standards withdrawn before, or not reprinted after, that date, the “60x” prefix is here enclosed in parentheses.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. This second edition cancels and replaces the first edition published in 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - relation between compatibility levels, emission limits and immunity requirements clarified; - sharing of emission levels between LV, MV and HV clarified; - new historical information added.