Protective Relays Their Theory and Practice
- PDF / 46,720,166 Bytes
- 498 Pages / 482 x 692 pts Page_size
- 110 Downloads / 165 Views
Protective Bela"s THEIR THEORY AND PRACTICE
VOLUME ONE
by
A. R. van C. WARRINGTON A.C.G.I., B.Sc.(Lond.), Fellow I.E.E.E., C.Eng., Fellow I.E.E. The English Electric Company Limited Stafford
1968
CHAPMAN & HALL LTD 11 NEW FETTER LANE EC4
First published 1962 Second edition 1968 ISBN-13: 978-1-4684-6461-0 e-ISBN-13: 978-1-4684-6459-7 DOl: 10.1007/978-1-4684-6459-7 by Fletcher & Son Ltd, Norwich
© 1962 and 1968 Albert Russell van Cortlandt Warrington Softcover reprint of the hardcover 2nd edition 1968
DEDICATION
To my wife, whose cheerful acceptance of eighteen months of 'grass-widowhood' enabled me to undertake this work.
Foremorll
HE rate of development in the field of protective relaying has been Texceptional in the last few years, but protection engineers and students have been somewhat handicapped by the lack of comprehensive and up-todate literature. The authors of Volumes I and II of this work have set out to rectify this situation. Mr. A. R. van C. Warrington, the author of Volume I, is a colleague of mine and has devoted the greater part of his professional career to protective relaying, both in the United States and in the United Kingdom. He has contributed on a substantial scale to the subject, in lectures and papers before professional institutions and it would be difficult to find anyone with greater experience on this subject. For this reason I have no hesitation in commending the present volume to the reader. H. M. MATHEWS, C.I.E., M.I.E.E., Director of Engineering for the English Electric Co. Ltd.
vii
Author's Prelaee
is an attempt to pass on to others the knowledge gained TbyHISthevolume author in 33 years of experience in the protective relay field, in the U.S.A. and Europe. It offers the student a new general theory of relay operation and brings the user up to date on modem design technique. It has been written primarily for protection engineers, but with an endeavour to make it easily understandable to students to whom this subject may be new. The second volume deals with static (solid-state) relays and provides additional information on c.t's., p.t's., fault incidence, transients and sources of relay error. A. R. van C. WARRINGTON.
ACKNOWLEDGEMENTS
WISH to thank the English Electric Company for their permission to I publish this book and for providing typing and drawing office facilities. I am greatly indebted, for editorial and technical advice, to Dr. Adamson and to my colleagues of the English Electric Company, and to those who coped with the heavy task of reproducing the manuscript and drawings. A. R. van C. W.
ix
Contents 1. PURPOSE OF PROTECTIVE RELAYS AND RELAYING
page 1
Causes of Faults. Definitions. Functions of Protective Relays. Application to a Power System. 2.
RELAY DESIGN AND CONSTRUCTION Characteristics. Choice of Measuring Units. Construction of Measuring Units. Construction of Timing Units. Details of Design. Cases. Panel Mounting. Operation Indicators. Finishes.
24
3.
THE MAIN CHARACTERISTICS OF PROTECTIVE RELAYS Phase and Amplitude Comparators. Rel
