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Dielectric Phenomena In High Voltage Engineering (Hardcover)
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Dielectric Phenomena In High Voltage Engineering (Hardcover)
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Originally published in 1915. PREFACE: It is the object of the
author to give in this book the properties of gaseous, liquid and
solid insulations, and methods of utilizing these properties to the
best advantage in the problems of highvoltage engineering. Such
problems require a knowledge, not only of the laws and mechanism of
breakdown of dielectrics as determined by experiment, but also a
simple working knowledge of the dielectric circuit. Methods that
have proved useful in designing apparatus, transmission lines,
insulators, bushings, etc., are discussed and illustrated by
practical application. In addition, such subjects as the manner of
making extensive engineering investigations and of reducing data,
the measurement of high voltages, the effects of impulse and
high-frequency voltages, methods of draw- ing dielectric fields,
outline of modern theory, various dielectric phenomena, etc., are
considered. In all cases where laws and discussions of dielectric
phenomena are given, it has been thought best to accompany these
with experimental data. Much original work is given, as well as
reference to other in- vestigations. The authors extensive research
was made possible by facilities afforded by the Consulting
Engineering Department of the General Electric Company, for which
acknowledgment is made. Thanks are due Mr. H. K. Humphrey, and
others, who have greatly assisted in the experiments and
calculations. SCHENECTADY, N. Y., April, 1915. Contents include:
PAGE PREFACE v DIELECTRIC UNITS xi TABLE OF SYMBOLS, xiii CHAPTER I
INTRODUCTION. ..... v ... v General discussion of energy transfer
Experimental plots of dielectric and magnetic fields Analogy
between magnetic and dielectric fieldsAnalogy with Hooke s Law.
CHAPTER II THE DIELECTRIC FIELD AND DIELECTRIC CIRCUIT 8
Mathematical Consideration General treatment of the dielectric
field and dielectric circuit with discussion of principles used
Parallel planes Field between per- mittance, etc. Concentric
cylinders Permittance or capacity flux density and gradient
Parallel wires Principles used in superposition of fields
determination of resultant fields equation of equipotential
surfaces, lines of force and flux density permittance gradient and
equigradient surfaces Concentric spheres Spheres Two small equal
spheres, field of, and permittance two large equal spheres,
gradient, permittance Conditions for spark-over and local breakdown
or corona Collected formulae for common electrodes Combinations of
dielectrics of different permittivities Dielectric flux refraction
Dielectric in series Dielectric in multiple Flux control Imperfect
electric elastivity or absorption in dielectrics dielectric
hysteresis. CHAPTER III VISUAL CORONA 38 General Summary and
Discussion Appearance Chemical action A. C. and D. C. spacing and
size of conductor Laws of visual corona formation Theory of corona
Electron theory Air films at small spacings Aii density Measuring
voltage by corona Conductor material, cables, oil and water on the
conductors, humidity. lonization Wave shape, current in wire.
Experimental Study and Method of Reducing Experimental Data Tests
showing the effects of size and spacing of conductors Air density
Temperature Barometric pressure Strength of air films Effect of
frequency Conductor material, oil, water, dirt, humidity lonization
Current in wire Stranded conductors Split conductors...
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