1、 IEC 61643-21 Edition 1.2 2012-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Low voltage surge protective devices Part 21:Surge protective devices connected to telecommunications and signalling networks Performance requirements and testing methods Parafoudres basse tension Partie 21:Parafoudres con
2、nects aux rseaux de signaux et de tlcommunications Prescriptions de fonctionnement et mthodes dessais IEC 61643-21:2000+A1:2008+A2:2012 Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is p
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16、echnique International(VEI)en ligne.Service Clients-webstore.iec.ch/csc Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous:csciec.ch.Copyrighted material licensed to BR Demo by Thomson Reuters(Scientific),Inc.,downloaded on Nov-27-2014 by James Madison.No further reproduction or distribution is permitted.Uncontrolled when printed.IEC 61643-21 Edition 1.2 2012-07 INTERNATIONAL STANDARD NORME INTERNATIONALE Low voltage surge protective
