IEC_TR_61916-2017.pdf

IEC TR 61916 Edition 4.0 2017-03 TECHNICAL REPORT Electrical accessories Harmonization of general rules IEC TR 61916:2017-03(en)colourinside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized in any form or by any means,electronic or mechanical,including photocopying and microfilm,without permission in writing from either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee for further information.IEC Central Office Tel.:+41 22 919 02 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About the IEC The International Electrotechnical Commission(IEC)is the leading global organization that prepares and publishes International Standards for all electrical,electronic and related technologies.About IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sure that you have the latest edition,a corrigenda or an amendment might have been published.IEC Catalogue-webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical information on IEC International Standards,Technical Specifications,Technical Reports and other documents.Available for PC,Mac OS,Android Tablets and iPad.IEC publications search-www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.Available online and also once a month by email.Electropedia-www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and French,with equivalent terms in 16 additional languages.Also known as the International Electrotechnical Vocabulary(IEV)online.IEC Glossary-std.iec.ch/glossary 65 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries have been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC Customer Service Centre-webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:csciec.ch.IEC TR 61916 Edition 4.0 2017-03 TECHNICAL REPORT Electrical accessories Harmonization of general rules INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.120.01 ISBN 978-2-8322-4117-2 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinside 2 IEC TR 61916:2017 IEC 2017 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms and definitions.7 4 General requirements.8 4.1 General.8 4.2 Standard conditions for operation in service.8 4.2.1 Ambient temperature.8 4.2.2 Altitude.9 4.2.3 Maximum relative humidity at 40 C.9 4.2.4 External magnetic field.9 4.2.5 Accessory orientation.9 4.3 Ambient air temperature range for testing.9 5 Resistance to heat.9 5.1 General.9 5.2 Requirements.9 5.3 Tests.10 6 Screws,current-carrying parts and connections(electrical and mechanical).11 6.1 General.11 6.2 Types of screw.11 6.2.1 Thread-forming screw.11 6.2.2 Thread-cutting screw.11 6.3 Requirements.12 6.4 Tests.14 7 Resistance to abnormal heat and to fire.15 7.1 General.15 7.2 Requirements.15 7.3 Glow-wire flammability test for end-products,IEC 60695-2-11.16 7.3.1 Purpose and principle.16 7.3.2 Test method.17 7.3.3 Relevance of test data.17 8 Resistance of insulating materials to tracking.18 8.1 General.18 8.2 Requirements.18 8.3 Tracking index test,IEC 60112.18 8.3.1 Purpose and principle.18 8.3.2 Test method.18 8.3.3 Relevance of test data.19 9 Resistance to rusting.19 9.1 General.19 9.2 Requirements.19 9.3 Test.19 10 Legibility,durability and indelibility of marking.20 10.1 General.20 10.2 Requirements.20 IEC TR 61916:2017 IEC 2017 3 10.3 Test.20 11 Screw-type terminals for connecting conductors.21 12 Criteria for tests in accessory standards.21 13 Tolerances.21 14 Mechanical strength.22 14.1 Impact.22 14.2 Free fall.22 15 Appropriate dimensioning of insulation distances.22 15.1 General.22 15.2 General information.22 15.3 Dimensioning of clearances.23 15.4 Dimensioning of creepage distances.23 15.5 Dimensioning of solid insulation.25 15.6 Dimensioning of functional insulation.25 15.7 Practical application of the IEC 60664 series with regards to particular questions.25 15.8 Other information useful for TC 23 a