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Journal of the American Institute of Electrical Engineers

Includes the top 50 most frequently accessed documents for this publication according to the usage statistics for the month of

  • Skin effect and proximity effect in tubular conductors

    Publication Year: 1922, Page(s):203 - 209
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1540 KB)

    The effective a-c. resistance of tubular conductors is required to be predetermined by designers, for radio installations, for large underground cables with non-magnetic cores, and for electric furnace circuits. (See Examples I to IV). For the above purpose, sets of curves are given in this paper. The skin effect ratio for isolated tubes is shown in Fig. 1. For stranded conductors, the resistance ... View full abstract»

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  • Transmission line relay protection — II

    Publication Year: 1922, Page(s):839 - 852
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3320 KB)

    This paper is divided into three parts, the first part consisting of a list of relay nomenclature according to function and application, the second part being a general discussion on relay protection with special reference to an investigation of the Protective Devices Committee to obtain information on transmission line protective scheme and the third part, an illustrated description of the result... View full abstract»

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  • Polyphase reaction synchronous motors

    Publication Year: 1923, Page(s):1162 - 1168
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1247 KB)

    THE reaction synchronous motor in its present form (salient-pole rotor without field coils) is one of the oldest types of electric motors, antedating the induction motor by many years. At first it was used only in connection with instruments, such as the oscillograph etc.; later its simplicity and exactness in keeping in step made it the standard driving motor for rectifying devices such as are us... View full abstract»

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  • A precise method of calculation of skin effect in isolated tubes

    Publication Year: 1923, Page(s):827 - 831
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1059 KB)

    A precise method of calculation is describ d for determining the skin effect in isolated tubular conductors. This may be used where more accurate results are desired than are given by the curves and approximate methods of calculation previously published by the writer. The present calculation requires the use of certain numerical values of Bessel functions, a table for which is given. Asymptotic s... View full abstract»

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  • The story of the induction motor

    Publication Year: 1921, Page(s):203 - 223
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5906 KB)

    This paper covers the history of the technical side of the development of the induction motor, principally as the author saw it. It indicates the various stages of development from the early Tesla motor, with polar field construction, to the distributed field construction, and from the early wound-rotor type to the later almost universal cage type. Reference is made to the development of the cage ... View full abstract»

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  • The cooling of electric machines

    Publication Year: 1923, Page(s):1278 - 1288
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2127 KB)

    THE disposal of the heat resulting from the electrical and mechanical losses in any electric machine is always an important item to the designer as well as to the operator of the machine. These losses appearing all in the form of heat must be transferred from their source with a temperature gradient not to exceed the maximum safe operating temperatures. These maximum temperatures are limited by th... View full abstract»

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  • Ajax-Wyatt electric furnace

    Publication Year: 1920, Page(s):1042 - 1043
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (830 KB)

    The Ajax-Wyatt electric furnace is an induction furnace of the vertical ring type. An induction furnace is in reality merely a transformer with a single-turn secondary. View full abstract»

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  • Radio telegraphy

    Publication Year: 1922, Page(s):561 - 570
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5869 KB)

    The lecture first deals briefly with the early history of long distance radio communication. The work carried out by the engineers and experts of the Marconi Company in England with electron tubes or triode valves shows that, according to their experience, greater efficiency can be obtained at present by a number of bulbs used in parallel than by the employment of large single unit tubes. Informat... View full abstract»

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  • The two-stage current transformer

    Publication Year: 1922, Page(s):389 - 398
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2858 KB)

    This paper presents a brief discussion of the current transformer as used with measuring and controlling apparatus with special reference to the degree of accuracy which can be attained in the ratio and phase angle. A new type of current transformer is then described, in which it is possible to secure much higher accuracy with a given amount of iron and copper in the transformer. In this new devic... View full abstract»

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  • A new equation for the static characteristic of the normal electric arc

    Publication Year: 1923, Page(s):12 - 19
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1410 KB)

    COMMERCIALLY the electric arc is now extensively used, and yet after more than a hundred years of study, there has been little crystallization of opinion as to certain phases of its fundamental theory. Absolute contradictions are frequently found in the literature, and premature generalizations have given rise to more disagreement among the investigators of the equation of the static characteristi... View full abstract»

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  • Submarine detection in an alternating magnetic field

    Publication Year: 1920, Page(s):223 - 234
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2816 KB)

    The paper describes a series of tests of the disturbance caused in a uniform alternating magnetic field by an incoming magnetic mass looking to the development of a device for the detection of enemy submarines. Detection tests in the laboratory with submarine models 10 ft. long are in agreement with underlying theory and may be used as a basis for the design of larger equipment. Detection tests on... View full abstract»

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  • Synchronous motors for ship propulsion

    Publication Year: 1921, Page(s):369 - 373
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2360 KB)

    SINCE the inception and development of the idea of electric ship propulsion, the question of the possibility of using synchronous motors for such service has often been raised. Such a motor could be designed for unity power factor with a resulting saving in cost, weight, and efficiency, of both motor and generator. So far as mechanical design was concerned, the answer was, of course, that the same... View full abstract»

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  • The effect of transient voltages on dielectrics — III (An investigation with very high lightning voltages)

    Publication Year: 1923, Page(s):623 - 630
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3736 KB)

    During a thunder storm lightning voltages that reach the transmission line appear across insulators, transformers and other apparatus at the extremely rapid rate of millions of volts per second. With this rapid rate of application the voltage may reach a very high value in a microsecond (millionth of a second). Hence, since there is always a delay or lag in the breakdown of insulation, quite pecul... View full abstract»

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  • Transmission line transients

    Publication Year: 1923, Page(s):1155 - 1158
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3224 KB)

    THE purpose of this paper is to present briefly the results of an investigation on transmission line transients recently performed in the Department of Electrical Engineering, Mass. Inst. of Tech., by Messrs. S. M. Jones, J. A. Scott, B. Van Ness, and D. C. Jackson, Jr., graduate students in the department. The object of the research was to check experimentally part of the theory of transients on ... View full abstract»

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  • Skin effect and proximity effect in tubular conductors

    Publication Year: 1922, Page(s):671 - 674
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1166 KB)

    E. W. Davis: Many learned and excellent papers have been presented before this society and other physical or technical societies, on the subject of skin effect in conductors carrying alternating currents. These papers have not, however, been interpreted for the average engineer to understand. View full abstract»

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  • The technical story of the synchronous converter

    Publication Year: 1920, Page(s):21 - 26
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1529 KB)

    This is intended to be a semi-historical treatment of the engineering development of the synchronous converter as the author saw it. This development occurred over a long period of years and much of this was done inside of the electrical manufacturing companies, rather than in the operating field. In consequence, the many stages which eventually led to the great success of this type of electrical ... View full abstract»

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  • Physical interpretation of complex angles and their functions

    Publication Year: 1923, Page(s):155 - 164
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2129 KB)

    A child's idea of an angle is a corner or edge; the sharper the corner or edge, the smaller is the angle, and hence expressions like “acute (sharp) angle,” “obtu e (blunt) angle,” etc. With a little schooling his idea of an angle is broadened into that of turning or rotation and finds a geometrical expression in a circle. The amount of turning is represented by the area... View full abstract»

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  • Free and forced convection of heat in gases and liquids

    Publication Year: 1923, Page(s):1288 - 1293
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1439 KB)

    THE general problem of heat transfer requires a knowledge of the laws of conduction, radiation and convection. In 1822, Fourier gave us the first thoroughly scientific definition of conductivity and reduced the problem of heat conduction to an exact science, with a power and completeness which left little room for extension or improvement even to the present day. The law of radiation was first sug... View full abstract»

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  • Voltage regulation and insulation for large power, long distance transmission systems

    Publication Year: 1921, Page(s):643 - 665
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (14265 KB)

    Heretofore the distance to which power could be transmitted has been limited. This limitation is now removed by a simple method of loading the line with synchronous condensers, so that the current and voltage may be kept practically in phase. High power factor and hence high efficiency result, and the voltage rises of the system are very much reduced, thus reducing insulation strains. A standard f... View full abstract»

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  • Submarine detection in an alternating magnetic field

    Publication Year: 1920, Page(s):381 - 395
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3235 KB)

    It has been mentioned that when using a detecting instrument of quite high sensitivity it is necessary to go to very large sizes of the magnet and detecting coil, in order to reach even moderate distances of detection, if no other means are used for increasing the sensitivity. View full abstract»

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  • Mechanical computation of root mean square values

    Publication Year: 1923, Page(s):1093 - 1095
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (638 KB)

    Varying values of electric current with time are practically the ever-present condition in applications of electricity. There are two main divisions: First, varying loads, producing such data as are given, for example, by the current record of a curve-drawing ammeter; the time is recorded in hours, minutes or seconds. Second, the condition of varying currents in the alternating-current waves thems... View full abstract»

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  • Polyphase power representation by means of symmetrical coordinates

    Publication Year: 1920, Page(s):543 - 544
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (458 KB)

    THIS paper is a more complete presentation of the subject of power representation by means of symmetrical coordinates, which was briefly outlined in the author's paper on Symmetrical Co-ordinates presented at the 30th Annual Convention, 1918. View full abstract»

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  • Cable geometry and the calculation of current-carrying capacity

    Publication Year: 1923, Page(s):525 - 539
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3144 KB)

    The main purpose of this article is to express the calculation of current-carrying capacity in simple formulas. The allowable current for underground cables is usually limited by the maximum permissible temperature of the insulation. The temperature rise is of course a function of the ability of the cable system to dissipate the heat generated. The chief difficulty in the calculation of current-ca... View full abstract»

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  • Queenston-Chippewa development of the Hydro-Electric Power Commission of Ontario

    Publication Year: 1922, Page(s):508 - 526
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (17649 KB)

    This paper covers a general description of the entire Queenston-Chippewa development of the Hydro-Electric Power Commission of Ontario, on the Canadian side of the Niagara River, which will have an ultimate capacity approximating 650,000 h. p. The general scheme of the development comprises an intake structure in the Niagara River at Chippewa; the utilization, by deepening and widening, of the Wel... View full abstract»

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  • Radiation from transmission lines

    Publication Year: 1923, Page(s):95 - 105
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2150 KB)

    The aim of this investigation was to contribute something to our knowledge of traveling electromagnetic waves. Among the transient phenomena that occur along transmission lines, these are still little known, especially as far as their “attenuation” and “distortion,” or change in shape near the “wave front” are concerned. It is first seen that the “c... View full abstract»

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  • The Petersen earth coil

    Publication Year: 1922, Page(s):140 - 148
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6336 KB)

    Accidental arcing grounds on transmission lines constitute the foremost problem to be solved in the transmission of electrical energy over great distances. There has come into use to a limited extent, arcing ground suppressors. This device consists in principle, of a switch in the station which is automatically closed in parallel with the accidental arc at any point out on the system. The parallel... View full abstract»

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  • 220-Kv. Transmission: Southern California Edison company system, and some 220-Kv. researches

    Publication Year: 1922, Page(s):471 - 488
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (10872 KB)

    The rapid growth in the demand for electric power and the increasing distances to which transmission is desirable, have constantly forced the use of higher transmission voltages. The Southern California Edison Company, having two single-circuit tower lines 241 miles long from its Big Creek hydroelectric plants to near Los Angeles, had the alternative of either duplicating these lines or of raising... View full abstract»

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  • Upper Falls development of the Washington Water Power Company in Spokane, Wash.

    Publication Year: 1923, Page(s):1134 - 1140
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2374 KB)

    This describes a late hydroelectric development in the center of a city having a single vertical shaft generator and delivering its output to the busses of an existing distribution substation 350 ft. distant, the excitation and load control of the new generator being from the substation. The principal features of the development are the auxiliary devices to assure reliable operation of a remotely ... View full abstract»

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  • Electric propulsion of ships

    Publication Year: 1921, Page(s):823 - 824
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2467 KB)

    THIS paper deals primarily with the electric propulsion of ships, except wherein a comparison of some particular feature or characteristic warrants a reference to some other type of drive. In dealing with electric propulsion, it is necessary to consider all classes of ships, and this leads to two broad, general classifications, such as merchant ships and war vessels. View full abstract»

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  • Magnetic and electrical properties of iron-nickel alloys

    Publication Year: 1920, Page(s):396 - 405
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3170 KB)

    Part 1. This investigation was undertaken to determine whether any iron-nickel alloys could be found having a higher saturation value than pure iron. Alloys were prepared containing 0–100 per cent Ni. Pure Fe-Ni alloys do not forge readily, and to make them forgeable it is necessary to add alloying elements like Mn or Ti. The results show that the saturation value decreases slowly with incr... View full abstract»

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  • Performance of auto transformers with tertiaries under short-circuit conditions

    Publication Year: 1923, Page(s):1243 - 1247
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1960 KB)

    The problem of operating many of the present day transformers designed and built to function in sizes and under conditions unheard of only a few years ago, is now of prime importance to many of the larger power companies. A statement of one type of the operating troubles encountered in the larger sizes is discussed in this paper and data taken as far as practicable under operating conditions is gi... View full abstract»

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  • On electrostatic transformers and coupling coefficients

    Publication Year: 1921, Page(s):23 - 29
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1425 KB)

    Starting from the experimentally determined fact that the capacity of an air condenser is independent of the frequency of electrical oscillation, it is shown by means of Lord Rayleigh's equations for the mutual reaction between two circuits each having inductance, resistance, and capacity, that for high-frequency conditions when the resistance is negligible compared to the reactance, the capacity ... View full abstract»

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  • The automatic-start polyphase induction motor

    Publication Year: 1922, Page(s):772 - 794
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (12650 KB)

    A paper presented by the author at the 314th meeting of the American Institute of Electrical Engineers, held in St. Louis, on Oct. 19, 1915, covers the characteristics, electrical and mechanical design of the repulsion-start, single-phase induction motor. The present paper similarly deals with the automatic-start, polyphase induction motor which has very similar characteristics. This automatic-sta... View full abstract»

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  • The audion oscillator

    Publication Year: 1920, Page(s):471 - 484
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2426 KB)

    18. Operating Point on the Characteristic Curve By operating point on the characteristic curve is meant the point on the Ec — Ib curve of the audion about which the grid potential and space current vary. Ec is the potential of the grid with respect to the filament. If a continuous negative potential such as Q Fig. 36 is applied, the point about which the var... View full abstract»

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  • Proximity effect in wires and thin tubes

    Publication Year: 1923, Page(s):961 - 970
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1473 KB)

    Formulas are given, with examples, for the following new problems in proximity effect resistance ratio: Thin Tube and Infinitesimal Wire; Two Thin Tubes in Return Circuit; Two Thin Tubes in Parallel; Insulated Cable Sheaths in Single-Phase Circuit; Cable Sheaths in Three-Phase Circuit, Flat Spacing; Finite Wire and Infinitesimal Wire; Two Wires in Parallel; Three-Phase Circuit, Triangular Spacing,... View full abstract»

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  • Professional ethics

    Publication Year: 1922, Page(s): 74
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (321 KB)

    The A. I. E. E.'s permanent Committee on Code of Principles of Professional Conduct reported to the Board of Directors of the Institute, at a recent meeting, recommending that “to serve as a guide for the membership and for future decisions, the findings of the committee upon cases brought before it be published in the Institute Journal.” This recommendation has been approved; and in... View full abstract»

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  • A new electrical precipitation treater

    Publication Year: 1920, Page(s):890 - 903
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4483 KB)

    This article gives the description and theory of a new electrical precipitation treater, with results of experimental work in laboratories. The paper contains: 1. General Description of the New Precipitation Treater; with Glass-Covered Electrodes. 2. Experiments at the Electrotechnical Laboratory, Tokyo, Japan. 3. Experiments at the Copper Refining Factory at Nikko. 4. Field of Practical Applicati... View full abstract»

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  • Skin effect in large stranded conductors at low frequencies

    Publication Year: 1921, Page(s):757 - 763
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1272 KB)

    The resistance of metallic conductors is higher for alternating currents than for direct currents, due to the so-called “skin-effect”. With alternating currents, the distribution is not uniform throughout the cross-section, there being a tendency for the current to concentrate towards the outside of the conductor, thus causing an increase of resistance and consequent increase of powe... View full abstract»

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  • On the equivalence of the two theories of the single phase induction motor

    Publication Year: 1921, Page(s):640 - 641
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    It is shown that the two equivalent diagrams of a single-phase induction motor, viz., the one deduced from the revolving-field theory and that from the cross-flux theory, can be converted into each other. In other words, the two theories lead to the same performance of a motor with given design constants. It is also shown that many other equivalent diagrams are possible and that one of these conta... View full abstract»

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  • The effects of moisture on the thermal conductivity of soils: With a bibliography on the heating of cables

    Publication Year: 1922, Page(s):92 - 98
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2258 KB)

    It has been appreciated for many years that the presence of moisture in the soil surrounding underground cable was of assistance in dissipating the heat generated within the cable. But little was definitely known, however, of the exact changes in the thermal conductivity of soils caused by the presence of moisture. The following article shows that moisture plays a predominant part. The relative th... View full abstract»

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  • Color temperature and its relation to the quality of light

    Publication Year: 1922, Page(s):279 - 280
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1493 KB)

    In a paper1 presented before the Illuminating Engineering Society in October 1921 at Rochester, the subject of color temperature and its relation to the quality of the emitted light for a number of different light sources was discussed. There it was shown that by the use of the color temperature of a light source a number is given which expresses the quality of the light of those source... View full abstract»

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  • Shaft currents in electric machines

    Publication Year: 1923, Page(s):1325 - 1334
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4031 KB)

    This paper describes the causes of, and remedies for, the existence of “shaft currents” or “bearing currents” which sometimes flow across the rubbing surfaces of the bearings of electric machinery, thereby gradually damaging the shaft and bearings. Up to the present time the only cause of shaft currents that has attracted any particular attention has been the use of sec... View full abstract»

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  • Artificial transmission lines with distributed constants

    Publication Year: 1923, Page(s):1293 - 1296
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2167 KB)

    THE theory of the transmission of electricity has been materially advanced through the use of artificial transmission lines in the laboratory. View full abstract»

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  • The two-stage current transformer

    Publication Year: 1922, Page(s):982 - 984
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    James R. Craighead: There are in addition to those outlined in this paper, several other methods of making phase angle correction in current transformers. The simplest is the use of a non-inductive shunt placed across the primary winding or across the secondary winding, which subtracts a certain amount of current either from the primary or the secondary side of the transformer. This current is in ... View full abstract»

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  • Turbine reduction gears versus electric propulsion for ships

    Publication Year: 1921, Page(s):724 - 729
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1604 KB)

    The question of whether electric or geared propulsion should be used depends entirely upon the type and operating conditions of the vessel. The Navy Department after years of comparative study, and having actual operating data on electrically propelled vessels available, has decided to equip all the larger Navy vessels with electric drive. In this type of ship, electric drive has a decided advanta... View full abstract»

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  • Torque components due to space harmonics in induction motors

    Publication Year: 1922, Page(s):928 - 932
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (932 KB)

    THE graphical method or circle diagram is undoubtedly the one most frequently employed in deriving speed-torque curves of induction motors from the design constants of the motor or from running and locked tests readings. In numerous papers and text books on induction motors are described quite a variety of circle diagrams, which have been developed for this purpose, each introducing more or less r... View full abstract»

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  • Discussion “on a new equation for the static characteristic of the normal electric arc”

    Publication Year: 1923, Page(s):847 - 848
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (557 KB)

    W. N. Eddy: As a supplement to his detailed analysis of the voltage-length-current characteristics of short arcs Mr. Nottingham might be interested in the results of some arc tests that were published in 1922.1 These tests were made with the idea of (1) trying out Dr. Steinmetz' equation at longer arc lengths than used by him in 1906 and (2) finding the effect on his equation of differe... View full abstract»

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  • High-voltage switches, bushings, lightning arresters: Experiences of the Southern California Edison Company on its 60,000, 150,000 and 220,000-volt system

    Publication Year: 1923, Page(s):1251 - 1254
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3137 KB)

    This paper describes the experiences of the Southern California Edison Company with oil switches on its 60-kv., 150-kv. and 220-kv. systems, with air break switches on its 220-kv. system, with bushings on its 60-kv., 150-kv. and 220-kv. systems, and with lightning arresters on all voltages from 11 kv. up. In some instances the experiences do not lead to unquestionable conclusions. This is particul... View full abstract»

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  • Current locus of single-phase induction motors

    Publication Year: 1922, Page(s):30 - 36
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1089 KB)

    The principal applications of the current locus of single-phase induction motors are the predetermination of the performance of a projected motor on the basis of its constants, and the determination of the performance and constants of an existing motor on the basis of a few simple tests. The first question is particularly attractive to a mathematically trained mind, because, with constants conside... View full abstract»

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  • The maximum safe operating temperature of low-voltage paper-insulated cables

    Publication Year: 1921, Page(s):131 - 134
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (879 KB)

    The Standards of the Institute state that for low-voltage cables the maximum safe operating temperature is 85 deg. cent. Experiments show that continuous operation at 100 deg. cent. for less than a month, seriously impairs the mechanical condition of impregnated paper. A standard of permissible mechanical condition should, therefore, be established, if such high temperatures are to be allowed. Ope... View full abstract»

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Aims & Scope

This Magazine ceased publication in 1923. The current retitled publication is IEEE Spectrum.

Full Aims & Scope