IEC 61000-2-4-ed.3.0

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Označenie: IEC 61000-2-4-ed.3.0

Dátum vydania: 25.07.2024

Stránok: 0

Krajina: Medzinárodná technická norma

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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). LIEC 61000-2-4:2024 traite des perturbations conduites dans la plage de frequences de 0 kHz a 150 kHz. Elle fournit les niveaux de compatibilite en mode differentiel (L-L et L-N) pour les sites industriels, avec une tension nominale jusqua 35 kV et une frequence nominale de 50 Hz ou 60 Hz. NOTE 1 Les sites industriels sont definis au 3.1.8. Les reseaux de distribution delectricite sur les navires, les aeronefs, les plateformes en mer et les reseaux ferroviaires sont exclus. NOTE 2 Voir aussi lAnnexe E. Les niveaux de compatibilite specifies dans le present document sappliquent au point de couplage interne a linstallation (IPC). Le niveau des perturbations a basse frequence aux bornes des equipements alimentes par lIPC est par hypothese generalement similaire au niveau de perturbation a lemplacement de lIPC. Toutefois, cela nest pas le cas dans certaines situations, particulierement avec un depart destine a lalimentation dune charge specifique par une ligne longue ou lorsquune perturbation est generee ou amplifiee dans linstallation dont les equipements font partie. Les niveaux de compatibilite sont specifies pour les differents types de perturbations electromagnetiques a basse frequence qui sont attendues en tout point de couplage interne a linstallation (IPC) dans des sites industriels, afin de fournir des recommandations pour definir: a) les limites relatives aux emissions perturbatrices sur les reseaux de distribution delectricite industriels (y compris les niveaux de planification definis au 3.1.5); NOTE 3 Les conditions presentes dans les environnements electromagnetiques des reseaux industriels peuvent etre tres variees. Ces conditions sont representees dans le present document par les trois classes decrites a lArticle 4. Neanmoins, il est de la responsabilite de lexploitant dun tel reseau de prendre en compte les conditions electromagnetiques et economiques particulieres, notamment les caracteristiques des equipements, pour etablir les limites susmentionnees. b) les niveaux dimmunite des equipements presents dans ces systemes. Les phenomenes perturbateurs suivants sont pris en compte: - les ecarts de tension; - les creux de tension et les coupures breves; - les desequilibres de tension; - les variations de la frequence du reseau dalimentation; - les harmoniques jusquau rang 40 inclus; - les interharmoniques jusquau rang harmonique 40; - les composantes de tension au-dessus du rang harmonique 40 jusqua 150 kHz; - la composante continue; - les surtensions transitoires. Les niveaux de compatibilite sont donnes pour differentes classes denvironnement, qui sont determinees par les caracteristiques du reseau dalimentation et des charges associees. NOTE 4 Les niveaux de compatibilite au point de couplage commun (PCC) sur les reseaux publics sont specifies dans lIEC 61000-2-2 pour les reseau