电磁兼容性 (EMC) 第2-4部分：环境 工业场所配电系统中低频传导干扰的兼容性水平

[中文适用范围]： 本部分 IEC 61000 涉及频率范围为 0 kHz 至 150 kHz 的传导干扰。它为工业场所和非公共配电系统提供了差分模式（L-L 和 L-N）的数值兼容性级别，额定电压高达 35 kV，额定频率为 50 Hz 或 60 Hz。 注 1 工业场所的定义见 3.1.8。 船舶、飞机、海上平台和铁路上的配电系统不包括在内。 本标准中指定的兼容性级别适用于厂内耦合点。对于从上述系统接收电源的设备电源输入端子，干扰的严重程度在大多数情况下可以视为与厂内耦合点的级别相同。在某些情况下并非如此，特别是在专用长馈线为特定负载供电的情况下，或者在设备所属的安装中产生或放大的干扰的情况下。 注 2 另见附录 E。本文件中指定的兼容性级别适用于厂内耦合点（IPC）。从 IPC 接收电源的设备终端处的低频干扰级别通常假定与 IPC 本身的干扰级别相似。然而，在某些情况下并非如此，特别是在专用长馈线为特定负载供电的情况下，或者在设备所属的安装中产生或放大的干扰的情况下。 为工业工厂或其他非公共网络场所内任何厂内耦合点（IPC）可能出现的低频电磁干扰类型指定了兼容性级别，以指导： a) 工业配电系统中的干扰排放限值（包括 3.1.5 中定义的规划级别）； 注 3 工业和其他非公共网络的电磁环境中可能存在非常广泛的条件。本文件通过第 4 章中描述的三个类别来近似这些条件。然而，此类网络的操作者有责任在设定上述限值时考虑特定的电磁和经济条件，包括设备特性。 b) 这些系统内设备抗扰级别的选择。 考虑的干扰现象包括： - 电压偏差； - 电压骤降和短时中断； - 电压不平衡； - 电源频率变化； - 高达 40 次的谐波； - 高达 40 次谐波的间谐波； - 高于 40 次谐波的高频电压分量（高达 150 kHz）； - 直流分量； [外文原描述]： IEC 61000-2-4:2024 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 61000-2-4:2024 is related to conducted disturbances in the frequency range from 0 kHz to 150 kHz. It gives compatibility levels in differential mode (L-L and L-N) for industrial locations, with a nominal voltage up to 35 kV and a nominal frequency of 50 Hz or 60 Hz. NOTE 1 Industrial locations are defined in 3.1.8. Power distribution systems on ships, aircraft, offshore platforms and railways are not included. NOTE 2 See also Annex E. The compatibility levels specified in this document apply at the in-plant point of coupling (IPC). The level of the low-frequency disturbances at the terminals of equipment receiving its supply from the IPC is generally assumed to be similar to the disturbance level at the IPC itself. However, in some situations this is not the case, particularly when a long feeder is dedicated to the supply of a particular load, or when a disturbance is generated or amplified within the installation of which the equipment forms a part. Compatibility levels are specified for the types of low-frequency electromagnetic disturbances expected at any in-plant point of coupling (IPC) within industrial locations, for guidance in the definition of: a) limits for disturbance emissions in industrial power distribution systems (including the planning levels defined in 3.1.5); NOTE 3 A very wide range of conditions is possible in the electromagnetic environments of industrial networks. These are approximated in this document by the three classes described in Clause 4. However, it is the responsibility of the operator of such a network to take account of the particular electromagnetic and economic conditions, including equipment characteristics, in setting the above-mentioned limits. b) immunity levels for the equipment within these systems. The disturbance phenomena considered are: - voltage deviations; - voltage dips and short interruptions; - voltage imbalance; - power-frequency variations; - harmonics up to order 40; - interharmonics up to the 40th harmonic; - voltage components above the 40th harmonic up to 150 kHz; - DC component; - transient overvoltages. The compatibility levels are given for different classes of environment determined by the characteristics of the supply network and loads. NOTE 4 Compatibility levels at the point of common coupling (PCC) on public networks are specified in IEC 61000‑2‑2 for low-voltage networks and IEC 61000‑2‑12 for medium-voltage networks. IEC TR 61000‑3‑6 and IEC TR 61000‑3‑7 describe the approach of power distribution system operators to the limitation of emissions from installations and large loads. This third edition cancels and replaces the second edition published in 2002. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) introduction of new classes 2a, 2b and 2L (former class 2); b) modification of existing compatibility levels for class 3; c) addition of compatibility levels in the frequency range 2 kHz to 150 kHz; d) addition of compatibility levels using a new quantity: partial weighted harmonic distortion (PWHD).