IEC IEC63437 Edition 1.02025-11 INTERNATIONAL STANDARD Off grid and unreliable grid refrigerating appliances for domestic and light commercial use - Characteristics and test methods - Performance requirements andenergyconsumption IEC 63437:2025-11(en) ICS 97.030 ISBN 978-2-8327-0880-4 THIS PUBLICATIONIS COPYRIGHTPROTECTED Copyright@2025IEC,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 mechanicai, including photocopying and microfilm, without permission in writing from either IEc or IEC's member National Committee in the country of the requester. If you have any questions about IEC copyright IEC member National Committee for further information. IEC Secretariat Tel.: +41 22 919 02 11 3, rue de Varembe [email protected] CH-1211 Geneva 20 www.iec.ch Switzerland About the IEC 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 IECpublicationssearch- IEc Products &Services Portal-products.iec.ch webstore.iec.ch/advsearchform Discover our powerful search engine and read freely all the The advanced search enables to find IEC publications by a publications previews, graphical symbols and the glossary. variety of criteria (reference number, text, technical With a subscription you wili always have access to up to date committee, ...). It also gives information on projects, content tailored to your needs. replaced and withdrawn publications. Electropedia -www.electropedia.org IEc Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published containing more than 22 500 terminological entries in English details all new publications released. Available online and and French, with equivalent terms in 25 additional languages. once a month by email. Also known as the International Electrotechnical Vocabulary (IEV) online. IECCustomerServiceCentre-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:[email protected]. Warning! Make sure that you obtained this publication from an authorized distributor. IEC63437:2025@IEC2025 CONTENTS FOREWORD 5 INTRODUCTION. 1 Scope. 2 Normative references. 9 3 Terms and definitions 3.1 General .. 3.2 Unreliable grid supply .11 3.3 Off grid supply.. .12 3.4 Technical.. .13 3.5 Compartments.. ..13 3.6 Performance characteristics. .15 4 Categorization of refrigerating appliances in scope 16 5 Compartment storagetemperaturespecifications. .17 5.1 General.. 5.2 Calculation of Tc_min, Tc_max and Tcm for refrigerating appliances with a vertical door. .18 5.3 horizontal door or lid .... 6 Instruments,accuracyand precisionof measurements .20 6.1 General. .20 6.2 Electricalenergyconsumption. .20 6.3 Humidity .20 6.4 Length.. .20 6.5 Mass. 20 6.6 Temperature 21 6.7 Time.... ..21 6.8 Voltage and frequency ..21 6.9 Maximum current. ..21 6.10 DC power supply .21 7 General test conditions.. .21 7.1 General. ..21 7.2 Ambient temperatures .22 7.2.1 Sensors .22 7.2.2 .22 Temperature stability. 7.2.3 Climate classes . .22 7.3 Ambient relative humidity .. .23 7.4 Test room configuration.. ..23 7.4.1 Platform... 7.4.2 Rear wall or partition.... 7.4.3 Side partitions .. 7.4.4 Sensor location.. ..24 7.4.5 Testroomgeneral configuration .24 7.5 Electricity supply ... .25 7.5.1 General... .25 7.5.2 AC supply unreliable grid. .26 7.5.3 DC supply off grid .29 1 IEC63437:2025@IEC2025 7.5.4 AC/DC supply for hybrid refrigeratingappliances Preparation of an appliance for testing and general procedures. 8.1 General.. .32 8.2 Running in of newappliances 8.3 Installationof theappliance inthetest room... 8.3.1 General..... 8.3.2 Rear clearance ..32 8.4 Setting up .32 8.4.1 General.. .32 8.5 Variabletemperaturecompartment .33 8.6 Pre-