IEC_60071-1ed7.0b.img.pdf

NORMECEIINTERNATIONALEIECINTERNATIONAL71-1STANDARDSeptieme editionSeventh edition1993-12Coordination de lisolementPartie 1:Definitions,principes et reglesInsulation co-ordinationPart 1:Definitions,principles and rules CEI 1993 Droits de reproduction rservs-Copyright-all rights reservedAucune partie de cette publication ne peut tre reproduite ni No part of this publication may be reproduced or utilized inutilisee sous quelque forme que co soit et par aucun pro-any form or by any means,electronic or mechanical,code,electronique ou mecanique,y compris la photocopie etincluding photocopying and microfilm,without permissionles microfilms,sans laccord ecrit de lediteur.in writing from the publisher.Bureau Central de la Commission Electrotechnique Internationale 3,rue de Varemb Geneve,SuisseCommission Electrotechnique InternationaleCODE PRIXIECInternational Electrotechnical CommissionPRICE CODETMeAyHapoAHaR 3neKTpoTexHecHaR HOMHCCHAPour prix,voir catalogue en vigueurFor price,see current catalogue71-1IEC:1993-3-CONTENTSPageFOREWORD7Clause1Scope.92Normative references93 Definitions.113.1 Insulation co-ordination113.2 External insulation113.3 Internal insulation113.4 Self-restoring insulation113.5 Non-self-restoring insulation113.6 Insulation configuration terminal113.7 Insulation configuration.113.8 Nominal voltage of a system133.9 Highest voltage of a system133.10 Highest voltage for equipment(Um)133.11 Isolated neutral system.133.12 Solidly earthed neutral system133.13 Impedance earthed(neutral)system133.14 Resonant earthed(neutral)system.133.15 Earth fault factor133.16 Overvoltage.133.17 Classification of voltages and overvoltages153.18 Standard voltage shapes.153.19 Representative overvoltages(Urp)173.20 Overvoltage limiting device.173.21 Lightning(or switching)impulse protective level173.22 Performance criterion173.23 Withstand voltage.173.24 Co-ordination withstand voltage(Ucw)173.25 Co-ordination factor(K)193.26 Standard reference atmospheric conditions193.27 Required withstand voltage(Uw)193.28 Atmospheric correction factor(K)193.29 Safety factor(K.193.30 Standard withstand voltage(U)193.31 Test conversion factor(K)193.32 Rated insulation level193.33 Standard insulation level193.34 Standard withstand voltage tests19