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Transactions of the American Institute of Electrical Engineers

Issue 1 • March 1931

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Displaying Results 1 - 25 of 72
  • Table of contents

    Publication Year: 1931, Page(s):nil1 - nil2
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  • Preface

    Publication Year: 1931, Page(s): nil2
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  • Critique of Ground Wire Theory

    Publication Year: 1931, Page(s):1 - 18
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3488 KB)

    The paper consists of three parts, I??Induced Potentials, II??Direct Hits, and III??Other Effects. The work of previous investigators is briefly reviewed, and the limitations of their premises pointed out. Under Part I a generalized theory of ideal ground wires is offered, which takes into account the law of cloud discharge, the distribution of bound charge, and the formation of traveling waves. I... View full abstract»

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  • Discussion

    Publication Year: 1931, Page(s):18 - 22
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  • The Influence of Polarity on High-Voltage Discharges

    Publication Year: 1931, Page(s):23 - 33
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6487 KB)

    An experimental investigation of the influence of polarity on high-voltage discharges is reported in this paper. Particular attention is given to those discharges used in high-voltage measurements. A theory of the formation of Lichtenberg figures is given together with experimental evidence upon which it is based. A polarity indicator utilizing visual Lichtenberg figures is described. Results of 6... View full abstract»

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  • Disussion

    Publication Year: 1931, Page(s):33 - 35
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  • Corona Loss Measurements on a 220-Kv. 60-Cycle Three-Phase Experimental Line

    Publication Year: 1931, Page(s):36 - 43
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1633 KB)

    Corona loss measurements were made on seven different conductor specimens. The losses were measured directly, on a three-phase line 700 ft. long, by means of three single-phase high-voltage wattmeters. The object of the test was to obtain data for the choice of conductor to be used on a 220-kv. 60-cycle line. The results show the effect of weathering of conductors, the comparison of conductors of ... View full abstract»

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  • Discussion

    Publication Year: 1931, Page(s):43 - 46
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  • Development of the Porcelain Insulator

    Publication Year: 1931, Page(s):47 - 51
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1742 KB)

    Porcelain insulators have been manufactured and used for the transmission of high-tension electric power for forty years. The first designs were of the single-piece and multipart cemented pin type. Necessity for higher safety factors against flash-over and increase in operating voltages demanded a rapid increase in the size of the insulators. This reached an economic limit at the operating voltage... View full abstract»

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  • Discussion

    Publication Year: 1931, Page(s):52 - 54
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  • Steam Power Development of the Pacific Gas & Electric Company

    Publication Year: 1931, Page(s):55 - 60
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1303 KB)

    Improvements in steam power generation and economic changes in the fuel supply have caused increasing interest in steam power on the Pacific Coast. After a brief history of the development of steam power on the system of the Pacific Gas & Electric Company, the author discusses some of the fundamental factors entering into the problem of providing additional steam plant capacity for this compan... View full abstract»

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  • Grounding Banks of Transformers with Neutral Impedances and the Resultant Transient Conditions in the Windings

    Publication Year: 1931, Page(s):61 - 66
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4332 KB)

    The question of grounding transformer bank neutrals through different impedances has recently arisen due to the desire to limit system single-phase and two-phase short-circuit currents. This limitation has been required to ease the duty on circuit breakers and assist in maintaining system stability. The use of resistance, inductance, and various combinations has been studied as to the effect on th... View full abstract»

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  • Discussion

    Publication Year: 1931, Page(s):67 - 72
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  • New Trends in Mercury Arc Rectifier Developments

    Publication Year: 1931, Page(s):73 - 79
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3188 KB)

    Research investigations conducted by engineers as well as physicists during the last few years have resulted in notable improvements in the mercury arc rectifier, in particular with reference to backfire protection and voltage regulation as well as improved manufacturing methods. These improvements made it possible to build rectifiers of very large current capacities as well as for very high volta... View full abstract»

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  • Discussion

    Publication Year: 1931, Page(s): 79
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  • Development of a Relay Protective System On the Lines of the Southern California Edison Company, Ltd.

    Publication Year: 1931, Page(s):80 - 88
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2135 KB)

    A record of the application of protective relays on the system of the Southern California Edison Company, Ltd., is presented. The history of this development of the protective relays in the 220-kv. transmission line, together with the results of the application of protective relays is recorded. In view of the limited application of carrier current protection, considerable discussion is presented c... View full abstract»

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  • The Communication System of The Southern California Edison Company, Ltd.

    Publication Year: 1931, Page(s):89 - 99
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    This paper gives a general description of the Southern California Edison Company's communication system which not only meets the requirements of load dispatching but also serves to bring about close cooperation between the outlying district forces and their directing heads at division headquarters and in the general office. Decentralized dispatching which makes possible the restoration of service ... View full abstract»

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  • Discussion

    Publication Year: 1931, Page(s):99 - 100
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  • The Pennsylvania Railroad Electrification

    Publication Year: 1931, Page(s):101 - 105
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3862 KB)

    This paper covers the electrification program of the Pennsylvania Railroad and consists of a brief explanation of the reasons for the decision to embark on this electrification program, a review of the operating experiences leading up to the present designs used on the railroad, of catenary and transmission circuits, substation layout and types of equipment, as well as a description of the progres... View full abstract»

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  • Discussion

    Publication Year: 1931, Page(s): 105
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  • Electricity's Part in Open Cut Copper Mining

    Publication Year: 1931, Page(s):106 - 112
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7716 KB)

    This paper is intended to describe the electrification of the world's largest open cut copper mine, and also covers briefly main line transportation and miscellaneous uses of electrical energy at the concentrating plants, that are located approximately 18 miles from the mine. This electrification project was an economical and progressive step in copper mining and developed some very interesting en... View full abstract»

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  • Discussion

    Publication Year: 1931, Page(s):112 - 113
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  • Hydraulic and Electrical Possibilities of High-Speed, Low-Head Developments

    Publication Year: 1931, Page(s):114 - 119
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    The paper deals with the change brought about in hydroelectric practise by the introduction of the high-speed low-head propeller type of turbine. For a given head, up to about 70 ft., it is possible to run the units at a much higher speed, thus reducing materially the cost of the generator. The maximum efficiency of the unit is maintained and the part load efficiency greatly improved by the use of... View full abstract»

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  • Discussion

    Publication Year: 1931, Page(s):119 - 120
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  • Trend in Design and Capacity of Large Hydroelectric Generators

    Publication Year: 1931, Page(s):121 - 128
    Cited by:  Papers (2)
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    This paper describes the recent trend in design of large water-wheel driven generators. New features of mechanical construction made possible by fabricated designs are particularly emphasized, and illustrations of some recent machines are given. The 77,500-kv-a. generators for the Dnieprostroy project in Russia, which will be the world's largest hydroelectric generators, are described. In conclusi... View full abstract»

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