BS IS0 21498-1:2021 BSl Standards Publication Electrically propelled road vehicles : Electrical specifications and tests for voltage class B systems and components Partl:Voltage sub-classes and characteristics bsi. BRITISH STANDARD BS ISO 21498-1:2021 National foreword This British Standard is the UKimplementation of ISO 21498-1:2021.It supersedes PDISO/PAS 19295:2016,which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PEL/69,Electric vehicles. A list of organizations represented on this committee can be obtained on request to its committee manager. This publication does not purport to include all the necessary provisions of a contract.Users are responsible for its correct application. C The British Standards Institution 2021 Published by BSI Standards Limited 2021 ISBN 9780539045628 ICS 43.120 Compliance with a British Standard cannot confer immunity from legalobligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2021. Amendments/corrigenda issued since publication Date Text affected BSISO21498-1:2021 ISO INTERNATIONAL 21498-1 STANDARD First edition 2021-01-28 Electrically propelled road vehicles Electrical specifications and tests for voltage class B systems and components Part 1: Voltage sub-classes and characteristics Vehicules a propulsion electriqueSpecifications et essais electriques pourles systemes etcomposantsde classe B Partie l:Caracteristiques et sous classe de tension Reference number ISO 21498-1:2021(E) ISO C ISO 2021 BS ISO 21498-1:2021 ISO 21498-1:2021(E) COPYRIGHT PROTECTED DOCUMENT ISO 2021,Published in Switzerland All rights reserved.Unless otherwise specified,no part of this publication may be reproduced or utilized otherwise in any form or by any means,electronic or mechanicalincluding photocopying,or posting on the internet or an intranet,without prior the requester. ISO copyright office Ch.deBlandonnet8.CP 401 CH-1214 Vernier,Geneva,Switzerland Tel.+41227490111 Fax+41227490947 [email protected] www.iso.org ii OISO2021-All rights reserved 21498-1:2021 BS ISO ISO 21498-1:2021 Contents Page Foreword Introduction 1 Scope 2 Normative references 3 Terms and definitions 4 Abbreviated term. 5 General assumptions for the voltage class B system ... 6 Voltage sub -classes. 7 Characteristics of voltage sub -classes. 7.1 General 7.2 Component operating status . 7.3 7.4 Undervoltage and overvoltage 7.4.1 General 7.4.2 Overvoltage 7.4.3 Undervoltage 7.5 Allocation ofvoltage ranges and operating status - Overview ... 7.6 Voltage transients and ripple 7.6.1 Genera 7.6.2 Voltage slope 7.6.3 Load dump 7.6.4 Voltage ripple 10 Annex A (informative) Example for voltage ranges per voltage sub-clas. Bibliography OISO 2021-All rights reserved ii BS ISO 21498-1:2021 ISO 21498-1:2021 Foreword ISO (the International Organization for Standardization)is aworldwide federation of national standards bodies (ISO member bodies).The work of preparing International Standards is normally carried out through ISO technical committees.Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.International organizations,governmental and non-governmental,in liaison with IsO,also take part in the work. ISO collaborates closely with the International Electrotechnical Commission(IEC)on all matters of electrotechnicalstandardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives,Part 1.In particular the different approval criteria needed for the different types of IsO documents should be noted.This document was drafted in accordance with the editorial rules of the ISO/IEC Directives,Part 2 (see www.iso.org/directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.IsO shall not be held resp