IEEE Std 450 450TM EEE Standards IEEE Standards

1 ieee Std 450 -2002(Revision of ieee Std 450-1995) ieee Standards450 TMIEEE Recommended Practice forMaintenance, testing , and Replacementof Vented Lead-Acid Batteries forStationary ApplicationsPublished by The Institute of Electrical and Electronics Engineers, Park Avenue, New York, NY 10016-5997, USA3 April 2003 ieee Power Engineering SocietySponsored by thePES Stationary Battery CommitteeIEEE StandardsPrint: SH95063 PDF: SS95063 The Institute of Electrical and Electronics Engineers, Park Avenue, New York, NY 10016-5997, USAC opyright 2003 by the Institute of Electrical and Electronics Engineers, rights reserved. Published 3 April 2003. Printed in the United States of is a registered trademark in the Patent & Trademark Office, owned by the Institute of Electrical and Electronics Engineers, Incorporated.

2 Print: ISBN 0-7381-3491-0 SH95063 PDF: ISBN 0-7381-3492-9 SS95063 No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. ieee Std 450 -2002 (Revision of ieee Std 450-1995) ieee Recommended Practice for Maintenance, testing , and Replacement of Vented Lead-Acid Batteries for Stationary Applications Sponsor PES Stationary Battery Committee of the ieee Power Engineering Society Approved 9 December 2002 ieee -SA Standards Board Abstract: Maintenance, test schedules, and testing procedures that can be used to optimize thelife and performance of permanently installed, vented lead-acid storage batteries used for standbypower applications are provided.

3 This recommended practice also provides guidance to determinewhen batteries should be replaced. This recommended practice is applicable to full-float stationaryapplications where a charger maintains the battery fully charged and supplies the dc loads. Keywords: acceptance test, battery capacity, battery installation, battery maintenance, batteryreplacement criteria, battery service test, battery terminal voltage, connection resistance measure-ments, electrolyte level, equalize charge, float voltage, modified performance test, performancetest, service test, specific gravity, standby power applications, state of charge, test-discharge rate,vented lead-acid battery ieee Standards documents are developed within the ieee Societies and the Standards Coordinating Committees of theIEEE Standards Association ( ieee -SA) Standards Board.

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9 Copyright 2003 ieee . All rights reserved. iii Introduction (This introduction is not part of ieee Std 450-2002, ieee Recommend Practice for Maintenance, testing , and Replace-ment of Vented Lead-Acid Batteries for Stationary Applications.) Stationary lead-acid batteries play an ever-increasing role in industry today by providing normal control andinstrumentation power and back-up energy for emergencies. This recommended practice fulfills the needwithin the industry to provide common or standard practices for battery maintenance, testing , and replace-ment. The installations considered herein are designed for full-float operation with a battery charger servingto maintain the battery in a charged condition as well as to supply power to the normal dc loads.

10 However,specific applications, such as emergency lighting units and semi-portable equipment, may have other appro-priate practices that are beyond the scope of this recommended recommended practice may be used separately, and, when combined with ieee Std 484 -1996, IEEER ecommended Practice for Installation Design and Installation of Large Lead Storage Batteries forGenerating Stations and Substations and ieee Std 485 -1997, ieee Recommended Practice for SizingVented Lead-Acid Storage Batteries for Stationary Applications, will provide the user with a general guideto sizing, designing, placing in service, maintaining, and testing a vented lead-acid storage battery installa-tion. ieee Std 535 -1986 provides a standard for qualification of Class 1E lead storage batteries for nuclearpower generating stations.