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Electrical Engineering

Issue 6 • Date June 1933

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Displaying Results 1 - 25 of 63
  • [Front cover]

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

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

    Page(s): 363 - 364
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    Freely Available from IEEE
  • Professional advancement — A reappraisal of the value of Institute membership

    Page(s): 365
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    DURING this period of serious industrial depression some members of the Institute, and of other professional societies as well, have found it necessary or considered it expedient to resign their membership. This has been a misfortune for the Institute and an even greater misfortune, I believe for the individuals concerned. Indications now are that we are passing through the final stages of this depression and that it shortly will be followed by a period of prosperity during which engineers and recent graduates of engineering colleges again will find ready employment in industry. View full abstract»

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  • Air conditioning of private homes

    Page(s): 366 - 371
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    Air conditioning, having already proved its worth in theaters and auditoriums, now is being developed for the home. In this article are discussed equipment and energy requirements for both complete and partial air conditioning of typical homes in various climates. The electrical load that would accrue from a widespread use of this type of equipment also is discussed from the standpoint of the electrical utilities. View full abstract»

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  • Accelerated aging tests on high voltage cable

    Page(s): 371 - 377
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    ASSUMING that satisfactory 66-kv cable could be obtained, the Commonwealth Edison Company, Chicago, Ill., in 1926 adopted a new system plan1 which included 66-kv underground lines of 60,000-kva carrying capacity that practically constituted a bus extending across the city and sectionalized at the generating stations. The record of failures on this cable, which began shortly after it was placed in operation late in 1926, gave unmistakable evidence (Fig. 1) that this assumption was not entirely warranted; and, further, that there were some marked differences in the quality of the insulation furnished by the different manufacturers. There resulted a great impetus to the investigations2,3 on cable for lower operating voltages that had been in progress in Chicago for several years. View full abstract»

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  • Beauharnois development of the St. Lawrence River

    Page(s): 377 - 384
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    Development of the power resources of that portion of the St. Lawrence River which forms part of the boundary between the United States and Canada, for many years has been studied by engineers and talked by politicians; and neither the end of the discussion nor the start of construction is yet in sight. Equal in magnitude of power output, but not of expenditure, is the Beauharnois development of the Soulanges section of this same river, a wholly Canadian enterprise the initial installation of which is now in operation. The power canal of this development will form an integral part of the proposed St. Lawrence waterway. This article describes the project as a whole in a general way and presents in more detail the principal features of the electrical installation. View full abstract»

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  • General power applications in 1932

    Page(s): 385 - 386
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    Several recent developments in the application of electricity in industry are mentioned in the report of the Institute's committee on general power applications presented herewith. View full abstract»

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  • Precise timing of sporting events

    Page(s): 386 - 391
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    Lack of precise time measuring apparatus for athletic and other sporting events has led to the development of an electric timing system which is accurate to within 0.005 sec for short races and within 0.01 sec for a mile race. This system utilizes a synchronous electric clock and a high speed motion picture camera to photograph simultaneously the runner and the clock dials at the finish of the race. It was put to a practical test in the 1932 Olympics held in Los Angeles, Calif. View full abstract»

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  • Electrical machinery developments in 1932

    Page(s): 391 - 394
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  • Present practice in installation and performance of high voltage lightning arresters: A joint subcommittee report

    Page(s): 394 - 400
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    In an effort to determine present operating practice relative to the installation and performance of high voltage lightning arresters on electric power systems, the A.I.E.E. subcommittee on lightning arresters and the N.E.L.A. subject committee on lightning arresters circulated a joint questionnaire on that subject to 22 companies in various parts of the United States. Data obtained in the replies to the questionnaire are summarized in this report. While it is believed somewhat premature to draw definite conclusions, nevertheless certain definite trends may be observed. View full abstract»

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  • Electricity in iron and steel production — 1932

    Page(s): 400 - 401
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    In spite of the fact that there has been little new construction, numerous developments of electricity in the production of iron and steel were made during the past year. These are outlined in the following report of the Institute's committee on applications to iron and steel production. View full abstract»

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  • Relaying of high voltage interconnections

    Page(s): 402 - 409
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    A resume of relaying of high voltage transmission lines is presented in this article, with particular reference to the factors which must be considered on interconnections. The various types of relays in use are summarized from an operating engineer's point of view and conclusions are drawn. It is shown that the most satisfactory schemes are very expensive and the cheaper schemes are not entirely effective. A theoretical solution is proposed. View full abstract»

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  • Electrical testing of rubber covered wire

    Page(s): 409 - 412
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    An improved method for providing electrical breakdown tests of rubber covered wire has been developed which for telephone wire presents many advantages. The previously used water test has been replaced by a dry test, and one machine combines the testing and coiling operations. Details of the method are presented in this article. View full abstract»

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  • Abstracts of papers to be presented at the Summer convention

    Page(s): 412
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    INTERPRETIVE abstracts of all papers definitely scheduled for presentation at the A.I.E.E. summer convention (June 26–30, 1933) are published herewith, excepting only those papers published in this issue of ELECTRICAL ENGINEERING. View full abstract»

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  • Testing of high speed distance relays

    Page(s): 412
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    HIGH speed distance relays are rapidly establishing a new conception of system protection and are bringing to the front a different technique in relay testing. The inherent speed of distance relays makes it difficult to test them by watching indicating meters and relay motions during operation. Recent improvements in portable oscillographs have increased the utility of such equipment for tests of distance relays and to a lesser extent for tests on the older types of relays. View full abstract»

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  • Arc extinction phenomena in high voltage circuit breakers studied with a cathode ray oscillograp

    Page(s): 412 - 413
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    A MEDIUM-speed cathode-ray oscillograph with a rotating film has been built for the study of circuit breaker transients. The film is wrapped around a drum and rotated in the vacuum at high speed. Each film shows in a continuous trace, a complete story of the formation of arc, subsequent reignitions and final extinction. More than 15 complete cycles may be recorded without excessive blurring. Each film is self-calibrated. View full abstract»

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  • Interrupting capacity tests on circuit breakers

    Page(s): 413
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    IMPROVEMENTS in circuit breakers have been accelerated by the availability of short-circuit testing laboratories. Some of these laboratories are of sufficient capacity to test circuit breakers of reasonably high interrupting ratings at their full rated current and voltage. No laboratory, however, has sufficient capacity to make such tests on the largest circuit breakers now used. It has therefore been necessary to study the fundamentals of circuit interruption within the limits of laboratory equipment. Also, much study has been given to the determination of the differences between field service and testing conditions. View full abstract»

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  • A compression type low voltage air circuit breaker

    Page(s): 413
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    THE totally enclosed fuses employed to protect lowvoltage low-current distribution circuits perform their work so effectively and quietly that an analysis has been made to determine their principle of operation in order that this principle might be applied to a small circuit breaker. View full abstract»

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  • Compensating metering in theory and practice

    Page(s): 413
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    OUTSTANDING economies can be effected by metering high voltage loads on the low voltage side of the power transformers. A compensating meter in combination with a watthour meter, both connected to instrument transformers on the low voltage side, provides accuracy equal to, and in some cases better than, metering on the high voltage side. The method permits the use of low voltage current transformers of relatively greater thermal and mechanical limits and of improved accuracy, in comparison with high voltage current transformers of relatively smaller current ratings. View full abstract»

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  • A portable oscillograph with unique features

    Page(s): 414
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    A SIMPLIFIED portable oscillograph having a number of new optical and electrical features is described in this paper. The optical system, which consists of a combination of cylindrical lenses with axes at right angles, is designed to permit simultaneous viewing and photographing. A continuous time axis for both the viewing screen and film is secured by means of a small, variable speed, revolving mirror. View full abstract»

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  • Classification of bridge methods of measuring impedance

    Page(s): 414
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    AN ANALYSIS of the requirements for satisfactory operation of the simple 4-arm bridge when used for impedance measurements is given in this paper. The various forms of bridge are classified into 2 major types called the ratio-arm type and the product-arm type, based on the location of the fixed impedance arms in the bridge. These 2 types are subdivided further, based upon the phase relation which exists between the fixed arm impedances. Eight practical forms of bridges are given, 3 of them being duplicate forms from the standpoint of the method of measuring impedance. These bridges together allow the measurement of any type of impedance in terms of practically any type of adjustable standard. The use of partial substitution methods and of resonance methods with these bridges is discussed and several methods of operation are described which show their flexibility in the measurement of impedance. View full abstract»

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  • Better instrument springs

    Page(s): 414
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    ELECTRICAL measuring instruments play an important part in the generation, distribution, and sale of electrical power, and in the development and testing of electrical machinery. The accuracy of electrical measuring instruments depends as much upon the quality of the control springs as on the design of the torque producing elements. 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