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admittances amperes ances base kva calculated capacitive impedances Chapter components of current components of voltage connected currents and voltages currents flowing determined equal equations equivalent circuit fault current fault point geometric mean given ground wires internal reactance line currents line-to-line voltage line-to-neutral voltage load mutual capacitive mutual coupling mutual impedances negative negative-sequence currents negative-sequence network neglected neutral conductor obtained ohms per mile Ohms/Mile one-line diagram open conductor parallel parallel transmission phase currents phase voltages polyphase system positive positive-sequence currents positive-sequence network potential coefficients Problem respectively self-impedance sequence impedances sequence networks series circuit short circuits shown in Fig single-phase symmetrical components terminals three-phase circuit three-phase system transformer bank transmission circuits transmission line two-phase ungrounded unsymmetrical circuit vector volt voltage drop voltages and currents voltages to ground Y-connected zero zero-potential bus zero-sequence currents zero-sequence impedances zero-sequence network zero-sequence voltage
Page 52 - a system of n vectors or quantities may be resolved, when n is prime, into n different symmetrical groups or systems, one of which consists of n equal vectors and the remaining (n - 1) systems consist of n equi-spaced vectors which with the first mentioned group of equal vectors forms an equal number of symmetrical n-phase systems...".
Page 10 - EMF) and the currents are constantly changing from maximum positive to maximum negative, but the specified or effective value is equal to the square root of the average value of the square of the instantaneous values, which, for a true sine wave, is equal to the maximum value divided by \/ 2.
Page 17 - The numerical per unit value of any quantity is its ratio to a chosen base quantity of the same dimension. Thus a per unit quantity is a normalized quantity with respect to the chosen base value.
Page 193 - ... therefore, we exchange the imaginary and real components, changing the sign of the latter in so doing. We then proceed as though the angle were hyperbolic. The model permits of the projection of cos (=*= 0i =*= t0j) between the limits of + <» and — oo in 0!, and the limits of +1.4 and — 1.4 in 02. 4 Chart Atlas of Complex Hyperbolic and Circular Functions, by AE Kennelly, Harvard University Press, 1914.
Page 193 - ... foot of the projection from the hyperbola. This effects a geometrical process which is easily apprehended and 1 " Two Elementary Constructions in Hyperbolic Trigonometry," by AE Kennelly, Am. Annals of Mathematics, Salem Press, 2d Series. Vol. V, No. 4, pp. 181-184, July, 1904, mainly reproduced in " Tables of Complex Hyperbolic and Circular Functions," by AE Kennelly, Harvard University Press, 1914, Figs. 19-22, pp. 165-168. 2 " Artificial Electric Lines," by AE Kennelly, McGraw-Hill Book Co.,...
Page 65 - Well, a dot product is defined in the geometrical sense as the product of the magnitude of two vectors multiplied by the cosine of the angle between them.
Page 169 - Five Place Table of Natural Trigonometric Functions to Hundredths of a Degree.