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Transactions of the American Institute of Electrical Engineers

Volume 53: 1934

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Displaying Results 1 - 25 of 35
  • Industrial Notes

    Publication Year: 1934, Page(s): 1036
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    Freely Available from IEEE
  • Engineering Literature

    Publication Year: 1934, Page(s): 1035
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    Freely Available from IEEE
  • Membership

    Publication Year: 1934, Page(s):1034 - 1035
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    Freely Available from IEEE
  • Letters to the Editor

    Publication Year: 1934, Page(s):1031 - 1034
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    Freely Available from IEEE
  • News of Institute and related activities

    Publication Year: 1934, Page(s):1022 - 1031
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    Freely Available from IEEE
  • Insulation Resistance of Armature Windings

    Publication Year: 1934, Page(s):1010 - 1021
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1868 KB)

    Insulation resistance of the windings of an electric machine may be used as a barometer for indicating the condition of the windings. On the basis of tests on many machines of different types it is recommended that all insulation resistance readings be taken after the application of 500 volts (d-c) for one minute. The slope of the resistance-time curve at that point gives a combined indication of ... View full abstract»

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  • Cross Current of a 5-Arm Network

    Publication Year: 1934, Page(s):1004 - 1009
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    This paper treats the loci of cross currents in 5-arm networks with constant coefficients at constant applied voltage. It is shown that at constant frequency of applied voltage, the locus of the cross current is a circle when any one of the network arms is varied at constant phase angle or along one of its components. When the network arms are fixed and the frequency is varied the locus of the cro... View full abstract»

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  • A 7,000-Ampere Station Bus

    Publication Year: 1934, Page(s):994 - 1004
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5554 KB)

    Inductive heating and space limitations complicated the problem of redesigning a 4,000-amp bus to carry 7,000 amp, without structural changes in existing cells and runways. A general discussion of the unusual problems involved is given in this paper, together with the methods of solution and supporting test results. View full abstract»

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  • A Survey of Hydroelectric Developments

    Publication Year: 1934, Page(s):988 - 993
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1488 KB)

    A general outline of the status of modern hydroelectric developments is presented in this report by an A.I.E.E. subcommittee.* Major topics discussed are: developed water power of the world, present trends in utilization of water power, and hydraulic and hydrodynamic research. It is hoped that this report not only will present a retrospective picture of results achieved, but also will serve as a s... View full abstract»

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  • Voltage Control of Vapor Rectifiers

    Publication Year: 1934, Page(s):976 - 988
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3498 KB)

    Some of the changes to be introduced into the mathematical treatment of rectifier circuits when the fring of the anodes of a rectifier is advanced or retarded by control of the arc are described. The points considered and illustrated by theoretical curves include commutation between anodes, regulation, and wave shape of the output voltage for the more usual transformer connections, and resulting v... View full abstract»

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  • A Telemeter With Pilot Coil Transmitter

    Publication Year: 1934, Page(s):974 - 976
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1549 KB)

    The feature of the current-type telemeter described in this paper is the pilot coil which acts as a detector of load changes. View full abstract»

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  • High Voltage Insulators

    Publication Year: 1934, Page(s):969 - 973
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6397 KB)

    In this description of the manufacturing processes for suspension insulators, from design and research to finished product, is given a comprehensive list of the laboratory equipment required for adequate testing. Methods of testing for defects and the manner of assembly are sketched, and the need for further standardization is mentioned. View full abstract»

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  • A Compensated Automatic Synchronizer

    Publication Year: 1934, Page(s):960 - 968
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3453 KB)

    A relay for automatically synchronizing rotating machines has been developed which uses vacuum tubes to reduce mechanical adjustments, and which gives the closing indication at a constant time in advance of synchronism. This latter quality is shown to be required for rapid synchronizing with acceptable accuracy, in the absence of extremely accurate speed control. The theoretical requirements of su... View full abstract»

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  • Selsyn Instruments for Position Systems

    Publication Year: 1934, Page(s):953 - 960
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1535 KB)

    Selsyn instruments are miniature salient pole synchronous machines excited by alternating current. They are used to transmit electrically, to one or several of the instruments acting as the receivers, the rotation given to another of the instruments acting as a transmitter. This paper presents a study of the behavior and accuracy of these instruments at standstill and under synchronous rotation gi... View full abstract»

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  • Some New Developments in Supervisory Control

    Publication Year: 1934, Page(s):949 - 952
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    New developments in the direct selection system of supervisory control are described in this paper which also touches upon the systems and use of codes and gives examples of the use and operation of equipment. View full abstract»

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  • Calibration of the Sphere Gap

    Publication Year: 1934, Page(s):942 - 948
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1411 KB)

    A series of sparkover voltage calibration tests on sphere gaps using spheres of various sizes up to 200 cm in diameter are reported in this paper. Tests were made with gap spacings ordinarily used in pratice, and with 60-cycle and both positive and negative impulse voltages. Since these tests as well as those of other investigators show that some of the A.I.E.E. standard sphere gap calibration cur... View full abstract»

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  • Selection and Performance of Suspension Insulators

    Publication Year: 1934, Page(s):936 - 942
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    Some of the methods used in selecting and checking suspension insulators during the past 15 years on a large electric power transmission system comprising some 3,000 miles of steel tower lines, most of which operate at 132,000 volts, are outlined in this paper. The results obtained through various tests, the use of these results as a guide for insulator selection, and actual performance and expect... View full abstract»

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  • Grid Controlled Rectifiers and Inverters

    Publication Year: 1934, Page(s):926 - 935
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2091 KB)

    The rectifier and inverter characteristics of the grid controlled mercury arc rectifier o the 6-phase and 12-phase types are considered in this paper. The analysis of rectifier circuits has been extended to cover the effect of grid control on the output voltage, power factor, eficiency, wave forms, and other characteristics; and the characteristics of the grid controlled rectifier operating as an ... View full abstract»

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  • A New Porcelain Post Insulator

    Publication Year: 1934, Page(s):922 - 925
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1603 KB)

    A new porcelain post insulator for transmission lines, which is free from radio effect at its operating voltage, is described in this paper. Capacitance measurements are utilized to determine and rate the radio characteristics. Other points of design are described, such as improved leakage path to resist arcing in contaminated atmosphere, greater height to avoid grounding by birds, and increased r... View full abstract»

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  • Split Winding Transformers

    Publication Year: 1934, Page(s):914 - 922
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2922 KB)

    A discussion of the application of and advantages derived from the use of split winding transformers for separating bus sections and For avoiding undue concentration of power from high voltage lines. An explanation is given of the characteristics of these units with respect to the reactances and the effect of load unbalance on the windings. View full abstract»

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  • Encouraging Initiative in the Engineering Student

    Publication Year: 1934, Page(s):910 - 914
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1321 KB)

    Engineering education today is being examined from within as well as from without, with the object of adapting it to meet more adequately the changing demands of a profession broad and diverse although relatively young. With no precedent or past experience to serve as a guide, engineering education necessarily has developed by its own efforts through trial and experiment. This describes the educat... View full abstract»

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  • Voltage Regulation and Load Control

    Publication Year: 1934, Page(s):903 - 909
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2487 KB)

    Some of the problems involved in supplying electric power to the business sections of large metropolitan areas are dealt with in this article which describes the development and operation of new methods of voltage regulation and load control by means of which improved conditions are being obtained on the distribution system in New York City. View full abstract»

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  • Radio Influence Insulator Characteristics

    Publication Year: 1934, Page(s):899 - 903
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2747 KB)

    Insulators on high voltage lines may cause radio interference by the arcing of the insulator charging current. A copper oxide glaze for new insulators has been developed to prevent this arcing; treatment of old insulators with special compounds to exclude air is reported as helpful. Suspension insulators are found to require no treatment. View full abstract»

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  • The Suspension Insulator

    Publication Year: 1934, Page(s):895 - 898
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1672 KB)

    Improvements and strengths of suspension insulators which have been attained since the publication in 1931 of a paper by the present author are outlined in this paper. Details of the improvements which have been made since that time are discussed herein, and considerable data on the strength of suspension insulators of different types are given. View full abstract»

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  • Iron Armored Aerial Communication Cable

    Publication Year: 1934, Page(s):890 - 895
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1410 KB)

    This paper describes a study of the application of an iron armored aerial communication cable as an inductive co??rdination measure permitting a high voltage transmission line to occupy jointly for a distance of about 20 miles the same railroad right-of-way with telegraph and telephone circuits. Calculations are given indicating the induction to be expected on open wire communication circuits, and... View full abstract»

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