Protection Of Industrial Power Systems, Second Edition

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The protection which is installed on an industrial power system is likely to be subjected to more difficult conditions than the protection on any other kind of power system. Starting with the many simple devices which are employed and covering the whole area of industrial power system protection, this book aims to help achieve a thorough understanding of the protection necessary. Vital aspects such as the modern cartridge fuse, types of relays, and the role of the current transformer are covered and the widely used inverse definite-minimum time overcurrent relay, the theory of the Merz-Price protection system and the development of the high-impedance relay system are critically examined. This new edition has come about in response to the dramatic change from the use of electro-magnetic relays to electronic and micro-processor relays which figure in practically all new installations. Therefore, although the theory and usage are the same, the application can be much improved owing to the increased range and accuracy and the added facilities provided with the modern relays. This book reflects the change and explains the technical advantages.

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Protection of Industrial Power Systems This Page Intentionally Left Blank Protection of Industrial Powe r System s Second edition T. D a v i e s c Eng, FlEE Newnes ELSEVIER AMSTERDAM PARIS 9SAN 9 BOSTON DIEGO 9 HEIDELBERG ~ SAN FRANCISCO 9 LONDON ~ SINGAPORE Newnes is an imprint of Elsevier 9 NEWYORK 9 SYDNEY 9OXFORD ~ TOKYO Newnes is an imprint of Elsevier Linacre House, Jordan Hill, Oxford OX2 8DP, UK 30 Corporate Drive, Suite 400, Burlington, MA 01803, USA First edition 1984 Second edition 1996 Reprinted 1997, 1998, 2000, 2001, 2002, 2003, 2005, 2006 (twice) Copyright 9 1996, T. Davies. Published by Elsevier Ltd. All rights reserved The right ofT. Davies to be identified as the author of this work has been asserted in accordance with the Copyright, Designs and Patents Act 1988 No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without the prior written permission of the publisher Permissions may be sought directly from Elsevier's Science & Technology Rights Department in Oxford, UK: phone (+44) (0) 1865 843830; fax (+44) (0) 1865 853333; email: [email protected] Alternatively you can submit your request online by visiting the Elsevier web site at http://elsevier.com/locate/permissions, and selecting Obtaining permission to use Elsevier material Notice No responsibility is assumed by the publisher for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of any methods, products, instructions or ideas contained in the material herein. Because of rapid advances in the medical sciences, in particular, independent verification of diagnoses and drug dosages should be made British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library Library of Congress Cataloging-in-Publication Data A catalog record for this book is available from the Library of Congress ISBN-13:978-0-7506-2662-0 ISBN-I 0: 0-7506-2662-3 For information on all Newnes publications visit our website at www.newnespress.com Printed and bound in Great Britain 06 07 08 09 10 10 Working together to grow libraries in developing countries www.elsevier.com www.bookaid.org www.sabre.org :LSEVIER - BOOK AID , ...... " .... ti ...... I Sabre" t - o