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Electrical Engineering

Issue 11 • Date Nov. 1931

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Displaying Results 1 - 25 of 48
  • [Front cover]

    Publication Year: 1931, Page(s): c1
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    Freely Available from IEEE
  • [Front inside cover]

    Publication Year: 1931, Page(s): c2
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    Freely Available from IEEE
  • Contents

    Publication Year: 1931, Page(s):1 - 2
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    Freely Available from IEEE
  • Field studies of arcing faults on power lines

    Publication Year: 1931, Page(s):857 - 860
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    Experimental studies of arcing faults on a 75-kv. transmission system indicate that a lightning flashover is most likely to develop into a power arc when power current is flowing past the flashover point, when normal-frequency voltage is increased, or when line insulation is decreased. View full abstract»

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  • Why apply science?

    Publication Year: 1931, Page(s): 861
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    Most of the material things which man wishes to do can be done with certainty and repeated with assurance only through the application of scientific information. This is the fourth article of The Engineering Foundation's symposium “Has Man Benefited by Engineering Progress?” View full abstract»

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  • Electric analogs for difficult problems

    Publication Year: 1931, Page(s):862 - 865
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    When the mathematical solution of a problem is so difficult as to be impracticable it sometimes is possible to obtain the desired answer from the behavior of an analogous electric circuit. This article presents an analog of “coulomb friction,” and demonstrates the application of this analog to the previously unsolved problem of the torsional-vibration damper. View full abstract»

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  • Power equipment at KDKA's new station

    Publication Year: 1931, Page(s):865 - 868
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    Power for the two new high-power radio transmitters housed in KDKA's new quarters is obtained from a special 1,500-kva. outdoor substation. Included in the power equipment is a twelve-phase, 900-kw., 30-kv., mercury-cathode tube rectifier, the largest of its type yet built for radio. View full abstract»

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  • Reactance of lines with ground return

    Publication Year: 1931, Page(s):868 - 871
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (493 KB)

    Charts have been prepared which make possible the fairly accurate determination of the resistance and reactance of the earth return circuit. These values, together with the usual line and ground wire self-inductances, may be inserted in a simple formula to determine the positive or zero-phase-sequence impedance of the complete circuit. View full abstract»

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  • Circle diagrams for short lines

    Publication Year: 1931, Page(s):871 - 873
    Cited by:  Papers (1)
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    When once constructed, circle diagrams furnish the means by which many phases of transmission-line performance can be checked quite readily. A method is given here by which the center loci are determined for a large number of short-lines where capacitance may be neglected. View full abstract»

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  • Simplicity and economy of oil filled cable

    Publication Year: 1931, Page(s): 874
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    Oil filled cable has been developed for successful use at the highest operating voltages. Attention now is being focused on the economies of oil filled cable systems and on means of simplifying their installation, with a resulting freedom from failure due to mechanical causes. The three articles which follow the short introduction below, discuss these factors. View full abstract»

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  • Economics of high voltage cable

    Publication Year: 1931, Page(s):874 - 878
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    Careful studies have been made of the economics of the various types of cables for application in the Chicago district. The conclusions resulting from these studies are surprisingly definite, and indicate the trends in high voltage cable practise, especially as relating to the oil filled type. View full abstract»

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  • Layout of oil filled cable systems

    Publication Year: 1931, Page(s):878 - 880
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    Problems concerned with the supply of oil largely govern the layout of oil filled cable installations. Consideration must be given not only to the characteristics of the oil itself, but also to certain properties of the cable and duct structure governing the volume and pressure of oil required. View full abstract»

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  • Accessories for oil filled cable

    Publication Year: 1931, Page(s):880 - 882
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The development of more satisfactory cable joints, terminals, and reservoirs has greatly simplified the installation of oil filled cable and increased the reliability against mechanical failures. View full abstract»

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  • The transfer of skill to Russia

    Publication Year: 1931, Page(s):883 - 885
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    A native of Russia, speaking the language and familiar with the customs and habits of its people, the author has come to the conclusion that Russia's principal problem in her industrial development is one of management. On the basis of 25 years of professional engineering experience in the U.S.A. and a recent 18-month professional engagement in Russia, this conclusion has been reached. View full abstract»

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  • Compact industrial control

    Publication Year: 1931, Page(s): 885
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (215 KB)

    SOME of the trends in industrial electrical control as exemplified by recent steel mill installations are indicated in the accompanying illustrations. A seven-panel control desk built for use in connection with a 65-panel switchboard may be seen in the upper illustration. This board although only 98 in. long, and 30 in. high in front, accommodates full control for nine large d-c. motors and five d... View full abstract»

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  • Unity power factor for neon tube signs

    Publication Year: 1931, Page(s):886 - 888
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    Application of parallel capacitance will not correct the power factor of the usual commercial neon tube installation to a value greater than 90 per cent. A constant-current circuit for use with these signs is described in this article, which not only operates at unity power factor but possesses other advantages. View full abstract»

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  • Operating experiences with automatic and supervisory control

    Publication Year: 1931, Page(s): 888
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    Records have been kept by three different investigators on various types of automatic equipment for station control. These results are summarized in the following articles. View full abstract»

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  • Automatic control of substations

    Publication Year: 1931, Page(s):888 - 890
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    AUTOMATIC and semi-automatic stations of various types have been in operation during the past ten years on the system of the Columbia Gas and Electric Corporation. These stations include transformer substations for distribution at both 13,200 and 4,325 volts, street railway and Edison system synchronous converter stations, and synchronous condenser installations. View full abstract»

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  • Automatic and supervisory control of substations

    Publication Year: 1931, Page(s):890 - 892
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (423 KB)

    THE POLICY of the Toronto Hydro-Electric System is to locate moderate-sized distribution stations near the economical load centers and equip them for automatic or supervisory control. These automatic and supervisory equipments include all the more prominent types as well as equipment developed by the Toronto system for its own use. In addition there is at present a Gamewell signaling system which ... View full abstract»

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  • Supervisory automatic control of a generating station

    Publication Year: 1931, Page(s):892 - 894
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    EIGHT hydroelectric units, each having a capacity of 13,508 hp., are installed in the Ohio Falls hydroelectric station at Louisville, Ky. Each generating unit is complete in itself. Waterwheel, generator, exciter, governor, electrical control, oil and water supply, oil circuit breakers, etc., are individual to each unit and all related unit auxiliaries are fed entirely from that unit. View full abstract»

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  • Communication in the new Waldorf Astoria

    Publication Year: 1931, Page(s):895 - 897
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    Said to be the most completely equipped hotel ever built, this new edition of a famous old hostelry contains the largest array of electrical program distribution equipment ever installed in one building. Included also in its communication system are approximately 3,700 telephones and 66 teletypewriters; 125 trunk lines connect the hotel with the telephone central office. View full abstract»

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  • Corona versus conductor surface

    Publication Year: 1931, Page(s):898 - 899
    Cited by:  Papers (1)
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    Tests show that thin coatings of some materials reduce the corona losses from high voltage conductors, and that equal losses may be expected from weathered copper and aluminum wires of the same diameter. This investigation was suggested by previous tests (1930) made at the Ryan Laboratory, Stanford University; this earlier work indicated a temporary reduction in losses after the conductors had bee... View full abstract»

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  • Abstracts of papers presented at the Kansas city district meeting

    Publication Year: 1931, Page(s): 900
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  • Electric arc welding in building constuction

    Publication Year: 1931, Page(s): 900
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    Electrical Engineering for October 1931, p. 785–7, contained an article based upon this paper. (A.I.E.E. Paper No. 31M8) View full abstract»

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  • Effect of wave form on operation of induction relays

    Publication Year: 1931, Page(s): 900
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (178 KB)

    INDUCTION type relays will of course operate at their intended current values and time settings only when the shape of the current wave applied during a fault is similar to that of the test wave. The shape of the current wave in the relay during fault is dependent upon the wave form of the fault currents and voltages, and the characteristics of current transformers and secondary circuits. 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