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IEC 60364-4-43-ed.3.0
Low-voltage electrical installations - Part 4-43: Protection for safety - Protection against overcurrent
STANDARD published on 13.8.2008
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The information about the standard:
Designation standards: IEC 60364-4-43-ed.3.0
Publication date standards: 13.8.2008
SKU: NS-409971
The number of pages: 61
Approximate weight : 183 g (0.40 lbs)
Country: International technical standard
The category - similar standards:
Electricity supply systemsFuses and other overcurrent protection devices
Annotation of standard text IEC 60364-4-43-ed.3.0 :
IEC 60364-4-43:2008 provides requirements for the protection of live conductors from the effects of overcurrents. IEC 60364-4-43:2008 describes how live conductors are protected by one or more devices for the automatic disconnection of the supply in the event of overload (Clause 433) and short-circuit (Clause 434) except in cases where the overcurrent is limited in accordance with Clause 436 or where the conditions described in 433.3 (omission of devices for protection against overload) or 434.3 (omission of devices for protection against short-circuit) are met. Coordination of overload protection and short-circuit protection is also covered (Clause 435). This third edition cancels and replaces the second edition, published in 2001, and constitutes a technical revision. The main changes with respect to the previous edition are: - Introduction of new informative Annexes B, C and D. - Information concerning flexible cables added to Scope. - Requirements added for overload detection for the neutral conductor for harmonic currents. - Requirement that devices for protection against short-circuit current be capable of making as well as breaking short-circuit current added. - Information added to clarify protection against overload current. - Requirements where devices for protection against overload need not be provided expanded. - Requirements where devices for protection against short-circuit need not be provided expanded. - Requirements for short-circuit current ratings of busbar trunking systems added. The contents of the corrigendum of October 2008 have been included in this copy. La CEI 60364-4-43:2008 donne les exigences pour les protections des conducteurs contre les effets des surintensites. Cette norme decrit comment proteger les conducteurs par un appareil ou plus de deconnexion automatique de lalimentation en cas de surcharge (Article 433) et court-circuit (Article 434), a lexception ou les surintensites sont limitees conformement a lArticle 436 ou si les conditions decrites en 433.3 (omission dappareils de protection contre les surcharges) ou 434.3 (omission dappareils de protection contre les courts-circuits) sont remplies. La coordination entre les protections contre les surintensites et les courts-circuits est aussi incluse (Article 435). Cette troisieme edition annule et remplace la seconde edition, publiee en 2001, et constitue une revision technique. Les principales modifications par rapport a ledition precedente sont les suivantes: - Introduction des nouvelles Annexes B, C et D informatives. - Ajout dinformation dans le domaine dapplication concernant les cables souples. - Ajout dexigence pour la detection de surcharge dans le conducteur neutre en cas de courants harmoniques. - Ajout dexigence pour que les dispositifs de protection contre les court-circuits soient capables doperer aussi bien a louverture qua la fermeture sur un courant de court-circuit. - Developpement des exigences ou des dispositifs de protection contre les surcharges ne sont pas necessaire. - Developpement des exigences ou des dispositifs de protection contre les courts-circuits ne sont pas necessaires. - Ajout dexigences pour les courants de court-circuit assignes des systemes de canalisations prefabriquees. Le contenu du corrigendum doctobre 2008 a ete pris en consideration dans cet exemplaire.
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