IEEE IEEESTANDARDSASSOCIATION IEEE Recommended Practice for Seismic Design of Substations IEEE Power and Energy Society Sponsored by the Substation Design Criteria Committee IEEE 3 Park Avenue IEEE Std 693TM-2018 New York, NY 10016-5997 (Revision of IEEE Std 693-2005) USA IEEEStd693TM-2018 (Revision of IEEEStd693-2005) IEEE Recommended Practice for Seismic Design of Substations Sponsor Substation Design Criteria Committee of the IEEEPowerand EnergySociety Approved 23 October 2018 IEEE-SA Standards Board Abstract: Seismic design recommendations for substations, including qualification of different equipment types arediscussed.Design recommendations consist of seismic criteria,qualification installationmethods,anddocumentation. Keywords: anchorage, conductor, electrical equipment, damping, dynamic analysis, IEEE 693 TM, loads, projected performance, required response spectrum, seismic protective devices, seismic qualification, shake table, static coefficient analysis, support structure, suspended equipment, time history The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Copyright 2019 by The Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 10 April 2019. Printed in the United States of America. IEEE is a registered trademark in the U.S. Patent & Trademark Office, owned by The Institute of Electrical and Electronics Engineers, Incorporated. PDF: ISBN 978-1-5044-5486-5 STD23514 Print: ISBN 978-1-5044-5487-2 STDPD23514 IEEE prohibits discrimination, harassment, and bullying Formore information, visit http://www.ieee.org/web/aboutus/whatis/policies/p9-26.html. 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. Important Notices and Disclaimers Concerning IEEE Standards Documents IEEE documents are made available for use subject to important notices and legal disclaimers. These notices and disclaimers, or a reference to this page, appear in all standards and may be found under the heading “Important Notice" or “Important Notices and Disclaimers Concerning IEEE Standards Documents." Notice and Disclaimer of Liability Concerning the Use of IEEE Standards Documents IEEE Standards documents (standards, recommended practices, and guides), both full-use and trial-use, are developed within IEEE Societies and the Standards Coordinating Committees of the IEEE Standards Association （"IEEE-SA)StandardsBoard.IEEE （"theInstitute")develops its standards through a consensus development process, approved by the American National Standards Institute ("ANSI"), which brings together volunteers representing varied viewpoints and interests to achieve the final product. Volunteers are not necessarily members of the Institute and participate without compensation from IEEE. While IEEE administers the process and establishes rules to promote fairness in the consensus development process, IEEE does not independently evaluate, test, or verify the accuracy of any of the information or the soundness of any judgments contained in its standards. IEEE does not warrant or represent the accuracy or content of the material contained in its standards, and expressly disclaims all waranties (express, implied and statutory) not included in this or any other document relating to the standard, including,but not limited to, thewarranties of:merchantability; fitness for a particular purpose; non-infringement; and quality, accuracy, effectiveness, currency, or completeness of material. In addition, IEEE disclaims any and all conditions relating to: results; and workmanlike effort. IEEE standards documents are supplied “AS IS" and “WITH ALL FAULTS." Use of an IEEE standard is wholly voluntary. The existence of an IEEE standard does not imply that there are no other ways to produce, test, measure, purchase, market, or provide other goods and services related to the scope of the I