IEC/TR 61000-2-14-ed.1.0

Annotation of standard text IEC/TR 61000-2-14-ed.1.0 :

IEC TR 61000-2-14:2006 Describes the electromagnetic environment with respect to the voltages in excess of normal that are found on electricity supply networks operating at low and medium nominal voltages and that can be impressed on equipment connected to those networks, without considering further effects (e.g. amplification or attenuation) within an installation. Since these overvoltages have the potential to hinder the functioning of electrical and electronic equipment, they fall within the definition of electromagnetic disturbance in the field of EMC. Various categories of overvoltage are described, based on relative magnitude, duration and energy content. This Technical Report describes the phenomena of overvoltages, it does not specify compatibility levels and does not directly specify emission and immunity levels. The report describes the various phenomena and processes that cause overvoltages, including the transfer into the networks concerned of overvoltages that originate in or traverse other networks and installations, including higher voltage networks and the installations of electricity users. The effects of overvoltages on equipment are outlined. Some case studies of overvoltage events are presented. Recommendations are made regarding the general technical approach to mitigating the risk of equipment being hindered from operating as intended by the effects of overvoltages. (It is not the function of IEC publications to assign responsibility for mitigating measures to any of the parties involved.) The purpose of this report is to ensure that this important category of electromagnetic disturbance is included in the description of the environment in Part 2 of IEC 61000. For that purpose, only a brief description is provided of the various overvoltages and their causes and effects. A much more detailed treatment can be found in IEC 62066. A UIE publication - Guide to quality of electrical supply for industrial installations, Part VI: Transient and temporary overvoltages and currents - has a similar content. Measurement methods are specified in IEC 61000-4-30. IEC/TR 61000-2-14:2006 decrit lenvironnement electromagnetique en ce qui concerne les tensions superieures aux valeurs normales qui apparaissent dans les reseaux dalimentation electrique fonctionnant aux tensions nominales basses et moyennes, et dont peuvent faire lobjet les materiels connectes a ces reseaux, sans tenir compte de leurs effets (amplification ou attenuation, par exemple) a linterieur dune installation. Ces surtensions risquant dempecher le fonctionnement du materiel electrique et electronique, elles entrent dans le cadre de la definition des perturbations electromagnetiques dans le domaine de la CEM. Differentes categories de surtensions sont decrites, en fonction de lamplitude relative, de la duree et du contenu energetique. Le present Rapport technique decrit les phenomenes de surtension. Il ne precise pas les niveaux de compatibilite ni ne specifie directement les niveaux demission et dimmunite. Le rapport decrit les differents phenomenes et processus a lorigine de surtensions, y compris le transfert dans les reseaux concernes de surtensions qui prennent leur source ou traversent dautres reseaux et installations, y compris les reseaux a haute tension et les installations des usagers. Les effets des surtensions sur le materiel sont presentes. Certaines etudes de cas relatives a des evenements de surtension sont presentees. Des recommandations sont formulees en ce qui concerne lapproche technique generale permettant de limiter le risque de difficultes de fonctionnement lie aux effets des surtensions (il ne revient pas aux publications de lIEC dattribuer la responsabilite des mesures dattenuation a lune des parties impliquees.) Le present rapport a pour objet de verifier que cette categorie importante de perturbations electromagnetiques est incluse dans la description de lenvironnement dans la Partie 2 de lIEC 61000. A cet effet, seule une breve description des differentes surtensions et de leurs causes et effets est fournie. Un traitement beaucoup plus detaille peut etre consulte dans lIEC 62066. Une publication UIE (Guide to quality of electrical supply for industrial installations, Part VI: Transient and temporary overvoltages and currents – disponible en anglais seulement) presente un contenu similaire. Les methodes de mesure sont specifiees dans lIEC 61000-4-30. NOTE Le present Rapport technique ne contient pas de resultats de mesure detailles relatifs aux surtensions. Par consequent, la probabilite doccurrence ne peut pas etre evaluee. Mots cles: surtensions