1、 IEC TR 63040 Edition 1.0 2016-09 TECHNICA L R EPOR T Guidance on clearances and creepage distances in particular for distances equal to or less than 2 mm Test results of research on influencing parameters IEC T R 63040:2016-09(en)c olourinsideInternational Electrotechnical Commission THIS PUBLICATI
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11、NICA L R EPOR T Guidance on clearances and creepage distances in particular for distances equal to or less than 2 mm Test results of research on influencing parameters INTER NA TIONA L ELECTROTECHNICAL COMMISSION ICS 29.080.30 ISBN 978-2-8322-3656-7 Registered t rademark of t he Int ernational Elect
12、rot echnical Commission W arning!Make sure that you obtained this publication from an authorized distributor.c olourinsideInternational Electrotechnical Commission 2 IEC TR 63040:2016 IEC 2016 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative ref erences.7 3 Terms and def initions.7 4 Fundame
13、ntal aspects and phenomena of clearance and creepage distances.9 4.1 Mutual correlation of insulation characteristics with regard to environmental conditions.9 4.2 Pollution.9 4.2.1 General.9 4.2.2 Humidity level(HL).10 4.2.3 Relation of humidity levels to macro-environment.10 4.2.4 Comparative trac
14、king index(CTI).11 4.2.5 Flashover characteristics.11 5 Clearances and creepage distances.12 5.1 General.12 5.2 Clearances.12 5.2.1 Inf luencing criteria.12 5.2.2 Altitude.14 5.3 Creepage distances.16 5.3.1 General.16 5.3.2 Inf luencing f actors.16 5.3.3 Dimensioning of creepage distances of f uncti
15、onal insulation.22 6 Additional inf ormation regarding creepage distance characteristics surf ace current over a creepage distance(minimum insulation resistance).22 7 Water adsorption test.24 7.1 Object.24 7.2 Withstand characteristics of creepage distances under high humidity.24 7.3 Recommended tes
16、t method.25 7.3.1 Test specimen.25 7.3.2 Measurement of the impulse withstand voltage.25 7.3.3 Procedure f or characterization of the insulating materials.25 7.4 Def initions of the water adsorption groups.26 8 Dimensioning diagrams.28 9 Withstand voltage test f or creepage distance under humidity conditions.32 Bibliography.33 Figure 1 Clearances in air f or mutual correlation of insulation characteristics to withstand transient overvoltages up to 2000 m above sea level.14 Figure 2 Creepage dist
