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Electrical Engineering

Issue 2 • Date Feb. 1933

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Displaying Results 1 - 25 of 43
  • [Front cover]

    Page(s): c1
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    Freely Available from IEEE
  • [Front inside cover]

    Page(s): c2
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    Freely Available from IEEE
  • Contents

    Page(s): 73 - 74
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    Freely Available from IEEE
  • The battle of the alchemists

    Page(s): 75 - 80
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    Herewith is presented a review of Man's accomplishments in the transmutation of the elements of our physical world, from the time of ancient mythology when the alchemists sought to transform lesser substances into gold and silver, down to the time of our present-day alchemists, the modern physicists. The goal of today's battle is not precious metals, but energy. View full abstract»

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  • Direct selection supervisory control

    Page(s): 81 - 84
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    In this article is described a new development in supervisory control wherein the apparatus to be operated at a remote point is selected directly, without any intermediate connections to apparatus which is not to be operated. As many as 50 breakers may be controlled over 4 lines, while 25 can be operated over 2 lines. View full abstract»

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  • Air conditioning of passenger cars

    Page(s): 85 - 88
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    Many interesting design problems were encountered in the development of a suitable air conditioning equipment for railway passenger cars. In this article is presented a discussion of these problems together with a description of their solution, thus providing an account of a most interesting development as well as an outline of the requirements for this service. View full abstract»

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  • Flashover tests on 26-kv wood pole structures

    Page(s): 89 - 95
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    Results of a series of impulse and dynamic flashover tests on unit pole transmission construction now in standard use on a large 26-kv electric power transmission system are presented herewith. From the data obtained the net flashover voltages of wood and porcelain combinations of simple pole tops can be estimated. With the aid of data now available it is possible to design a wood pole line having almost any practical degree of lightning reliability. View full abstract»

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  • Auxiliaries electrified on Grace Line steamships

    Page(s): 95
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    ELECTRIFICATION of auxiliaries on 4 new sister ships of the Grace Line is stated to be “one of the most complete ever attempted in marine service. These ships are designed for the Panama mail fleet, the first ship, the S.S. “Santa Rosa,” having sailed on her maiden voyage November 26, 1932. These ships are of the twin screw, combination passenger-cargo type. View full abstract»

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  • Locomotive operation at the Cleveland terminal

    Page(s): 96 - 99
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    In 2 years of operation covering more than 1,000,000 miles the 22 3,000 — volt d-c passenger locomotives in use on the Cleveland Union Terminals electrification have experienced only 6 electrical failures. In this article the design and characteristics of the locomotives are reviewed briefly, and operating and maintenance data for the 2-yr period are summarized. View full abstract»

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  • A summary of year's insulation research

    Page(s): 99
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    INSULATING oil, capillary action of oil as related to paper, and properties of impregnated paper were discussed in considerable detail at the sessions of the committee on electrical insulation of the division of engineering and industrial research of the National Research Council, held in conjunction with the Institute's Middle Eastern District meeting, Baltimore, Md., October 10–13, 1932. A joint session under the auspices of the A.I.E.E. and the National Research Council was held, abstracts of these papers having been presented in ELECTRICAL ENGINEERING for September 1932, p. 659–60. View full abstract»

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  • Annual meeting of the committee on insulation

    Page(s): 99 - 100
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    Freely Available from IEEE
  • Cable developments discussed by committee

    Page(s): 100 - 101
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    CONTINUAL warfare is being carried on in numerous research laboratories against that arch enemy of high voltage cables, ionization. The cable in process contains air, so that the conditions on which this enemy would thrive are present and must be driven out in the beginning. From then on, there is no let-up in the fight to keep it out. View full abstract»

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  • Salient points from N.R.C. insulation papers

    Page(s): 101 - 106
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    AUTHORS' abstracts of papers presented at the sessions of the committee on electrical insulation of the National Research Council held in Baltimore, Md., October 11 and 12, 1932, follow. Requests for additional information should be addressed to National Research Council, 29 West 39th Street, New York, N. Y. View full abstract»

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  • Electronic devices for industrial control

    Page(s): 106 - 110
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    Following the intensive development of electronic tubes in recent years has come an increasing application of these tubes to industrial control operations. Several successful installations in different industries testify to the superiority of this type of control over the more conventional electromechanical type. In this article the relative advantages of electronic control are outlined, and 3 typical applications are described in detail. View full abstract»

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  • Power supply for the Pennsylvania railroad

    Page(s): 111 - 115
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    An energy consumption of 238,000,000 kwhr per year will be required to handle through passenger trains on the electrified portion of the Pennsylvania Railroad system between New York City and Philadelphia, Pa., on which through service recently was initiated. This article describes the system used to supply that energy to the moving trains. The arrangement of apparatus and circuits adopted has resulted in low first cost, low operating maintenance, and reliability and simplicity of operation. View full abstract»

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  • Impedance curves of a composite cable

    Page(s): 115 - 118
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    The balancing of a composite submarine telegraph cable, that is, one composed of both loaded and unloaded sections, requires a knowledge of its terminal impedance characteristics. In this article the impedance of such a cable is shown to be similar to that of an “equivalent” unloaded cable. Because of its limited frequency range, however, the type of network used with the unloaded cable at low speed signalling cannot furnish a satisfactory balance at the higher speeds of which the composite cable is capable; it is predicted that the mathematical theory developed here will aid in devising a means of extending that range. View full abstract»

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  • Mercury rectifiers for 250-volt supply

    Page(s): 119 - 121
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    The field of application of the multi-anode metal tank mercury cathode rectifier now available is outlined in this article with special attention to its adaptability to industrial load. Comparison of rectifiers with synchronous converters and motor generator sets is made, and loss and efficiency data are presented. View full abstract»

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  • Abstracts of papers presented at the Winter convention — January 23–27

    Page(s): 122
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    INTERPRETIVE abstracts of all papers presented at the technical sessions of the A.I.E.E. winter convention were published in the January 1933 issue of ELECTRICAL ENGINEERING, excepting only: (1) those papers upon which articles in that or preceding issues were based; and (2) those papers which at the time of going to press for that issue were not definitely scheduled for presentation. Abstracts of all remaining technical papers are presented herewith. View full abstract»

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  • Transients in arc welding generators

    Page(s): 122
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    THE TRANSIENT behavior of an arc welding generator, it is generally agreed, has considerable influence on the nature of the weld produced, both as to quality of weld and ease of manipulation. Several designs of generators have recently appeared which have been built to meet these requirements. This paper deals with the theory of armature and field current transients in such generators, giving the mathematical analysis and experimental results. From the tests were obtained oscillograms showing the effect of variation in the armature and field circuit inductance, and the mutual inductance between them. View full abstract»

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  • Performance and design of electric welders with controlled transients

    Page(s): 122
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    IN AN ATTEMPT to verify the theory previously given of electric welders with controlled transients, tests have been made on a neutralized welder and a standard type welder with and without a reactor transformer. Oscillograms show that while the standard machine has a large rise of current when short-circuited for 2 or 3 cycles of a 60 cycle wave, the machines with controlled transients have a very much reduced rise of current, and to this their improved performance partly is ascribed. A second important factor is the recovery of voltage after short circuit. It is shown that the function of the reactor transformer is to neutralize the mutual induction between the series and shunt fields of the welder, thereby rendering the field current more nearly independent of occurrences in the welding circuit. View full abstract»

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  • New studies of the arc discharge

    Page(s): 122 - 123
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    THE equation V = A + B/In which represents correctly all normal arc characteristics is used as the starting point for a general discussion of arc phenomena and industrial applications. Tests of this equation are applied to iron arcs in various gas atmospheres to obtain a series of values for A and B making possible certain deductions about arc voltage variations and significance of the characteristics. In limiting the current exponent n, the anode temperature must exert considerable influence upon the discharge as a whole. Suggestions are given why this may be so. A value of n is predicted from the arc stream geometry, and is compared with actual values of n for various arcs. View full abstract»

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  • Factors influencing the insulation coordination of transformers

    Page(s): 123
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    IN THE early days of the electrical industry, surges were relatively mysterious as to their origin, magnitude, and behavior. The ordinary factory tests now required by the A.I.E.E. rules were the reflection of experience and judgment rather than the analysis which has been made possible in the last few years. From experience, it was found on the one hand that it was necessary to increase the insulation of some parts of the transformers far above the requirements of the A.I.E.E. rules (i. e., turn and coil insulation bushings) and, on the other hand, to limit the voltages transmitted to the transformer from the line, by the specification of line insulation and protective gaps. In the meanwhile, progress has been made in the laboratory study of the surge characteristics of the insulators, gaps, and insulation structures commonly used in transformers. View full abstract»

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  • The measurement of high surge voltages

    Page(s): 123
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    WITH the application of surge tests to high voltage electrical apparatus, the question of the measurement of high surge voltages has become a subject of prime importance. In Part I of this paper is shown the practical work done in a commercial laboratory to calibrate the measuring devices, and in Part II are studied the more interesting relationships that affect the operation and accuracy of these measuring devices. View full abstract»

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  • Impulse voltage testing

    Page(s): 123
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    EQUIPMENT and methods used for the surge testing of distribution transformers at the engineering experiment station at Purdue University are described in this paper. The surge generator of 1,000 kv maximum and the cathode ray oscillograph used in these tests are described. Curves are presented to show the desirability of ultra-violet illumination of the sphere gaps, especially for the smaller gaps and shorter spacings. View full abstract»

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  • Coordination of insulation

    Page(s): 124
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    COORDINATION of system insulation is the selection of insulation in proportion to the anticipated overvoltages as limited by a coordination gap. A review of the development of coordination during the past few years is presented briefly in this paper, as a basis for discussing the means at present used for obtaining coordination of system insulation together with the advantages and disadvantages of various schemes. The 2 classes of overvoltage which may appear on a system, namely, switching surges and arcing ground voltages in the first class, and lightning voltages in the second class, are considered in respect to the selection of the coordination gap. It is pointed out that it is not logical to have steps or levels of insulation within a station, but that a uniform level of at least 10 per cent above the strength of the gap seems logical. View full abstract»

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Aims & Scope

This Periodical ceased publication in 1963. The current retitled publication is IEEE Spectrum.

Full Aims & Scope