IEC_62246-2-2007.pdf

IEC 62246-2Edition 1.0 2007-10INTERNATIONAL STANDARD Reed contact units Part 2:Heavy-duty reed switches IEC 62246-2:2007(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 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 3,rue de Varemb CH-1211 Geneva 20 Switzerland Email:inmailiec.ch Web: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.?Catalogue of IEC publications:www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria(reference number,text,technical committee,).It also gives information on projects,withdrawn and replaced publications.?IEC Just Published:www.iec.ch/online_news/justpub Stay up to date on all new IEC publications.Just Published details twice a month all new publications released.Available on-line and also by email.?Electropedia:www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French,with equivalent terms in additional languages.Also known as the International Electrotechnical Vocabulary online.?Customer Service Centre:www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance,please visit the Customer Service Centre FAQ or contact us:Email:csciec.ch Tel.:+41 22 919 02 11 Fax:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IEC 62246-2Edition 1.0 2007-10INTERNATIONAL STANDARD Reed contact units Part 2:Heavy-duty reed switches INTERNATIONAL ELECTROTECHNICAL COMMISSION VICS 29.120.70 PRICE CODEISBN 2-8318-9330-5LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 62246-2 IEC:2007(E)CONTENTS FOREWORD.5 1 General.7 1.1 Scope.7 1.2 Normative references.7 1.3 Terms,definitions,abbreviations and symbols.7 1.4 Preferred values.8 1.4.1 Frequency of operation.8 1.4.2 Duty cycle.8 1.4.3 Open-circuit voltage across contacts.8 1.4.4 Current ratings.8 1.4.5 Load ratings.8 1.4.6 Number of operations.8 1.4.7 Climatic category.8 1.4.8 Preferred environmental severities.8 1.4.9 Rated operational voltage;Ue.8 1.4.10 Rated switching current;Ie.9 1.4.11 Rated insulation voltage.9 1.4.12 Rated impulse voltage.9 1.4.13 Utilization categories.9 1.4.14 Contact reliability.9 1.4.15 Limiting continuous current;Ith.9 1.5 Marking.10 1.6 Order of precedence.10 1.7 Precautions regarding mercury(for mercury wetted contact units).10 2 Quality assessment procedures.10 2.1 General.10 2.2 Self-certification.10 2.3 Two-party certification.10 2.4 Third-party certification.10 3 Test and measurement procedures.11 3.1 General.11 3.2 Alternative procedures.11 3.3 Standard conditions for testing.11 3.4 Visual inspection and check of dimensions.11 3.5 Functional tests.11 3.6 Remanence test.11 3.7 Contact circuit resistance.11 3.8 Dielectric test.11 3.9 Insulation resistance.11 3.10 Operate,release,transfer or bridging,and bounce times.11 3.11 Contact sticking.12 3.12 Robustness of terminals.12 3.13 Soldering(solderability and resistance to soldering heat).12 3.14 Climatic sequence.12 3.15 Damp heat,steady state.12 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.62246-2 IEC:2007(E)3 3.16 Rapid change of temperature.12 3.17 Salt mist.12 3.18 Bump.12 3.19 Vibration.12 3.20 Shock.12 3.21 Acceleration test Functional test only.12 3.22 Sealing.12 3.23 Electrical endurance.12 3.23.1 General.12 3.23.2 Types of electrical endurance test.13 3.23.3 Standard electrical endurance test.13 3.23.4 Application simulation endurance test.14 3.23.5 Requirements.14 3.23.6 Information to be stated in the detail specification.14 3.24 Mechanical endurance.15 3.25 Maximum cycling frequency.15 3.26 Mounting position test(for mercury wetted contact units).15 3.27 Drain time test(for mercury wetted contact units).15 3.28 Voltage surge test.15 3.29 Rated impulse