# Transactions of the American Institute of Electrical Engineers

## Filter Results

Displaying Results 1 - 21 of 21
• ### System Anaysis for Petersen-Coil Application

Publication Year: 1938, Page(s):663 - 676
Cited by:  Papers (3)
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Careful analysis of the characteristics of a power system has been found to be necessary before applying Petersen coils to a system which has been operating either with the neutral isolated or grounded. In these two companion papers on Petersen coils, accent has been placed on the analysis of system characteristics in order to determine whether or not the application of Petersen coils will be sati... View full abstract»

• ### The fundamental principles of fluorescence

Publication Year: 1938, Page(s):677 - 681
Cited by:  Papers (2)
| | PDF (2073 KB)

Fluorescence is a property of many substances. It consists of an emission of light under excitation by radiation whose wave length falls within a critical absorption band. When the emission persists for an appreciable period after the existing radiation has been extinguished, it is known as phosphorescence. The fundamental principles of fluorescence are described in detail. View full abstract»

• ### A memory attachment for oscilloscopes

Publication Year: 1938, Page(s):682 - 685
Cited by:  Papers (6)
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The device described in this paper, called a "memnoscope," is a system for obtaining an oscillogram of random phenomena and events immediately preceding and following its occurrence. This system was developed and has been used to study arc-back phenomena m mercury-arc rectifiers. A description of the system is provided along with information on its construction and behavior. The memnoscope has pro... View full abstract»

• ### Remote Control of Network Protectors

Publication Year: 1938, Page(s):685 - 692
| | PDF (5002 KB)

Two low-voltage a-c networks have been installed in Tennessee, using a radically different protective scheme. The customary master relays, phasing relays, and associated current transformers have been omitted from the network protectors using in their place a remote-control system of pilot wires operated from relays at the supply substation which protect the high-voltage cable feeders. In contrast... View full abstract»

• ### Positive-Grid Characteristics of Triodes

Publication Year: 1938, Page(s):693 - 696
Cited by:  Papers (2)
| | PDF (920 KB)

The total emission current in a vacuum tube can be expressed by the familiar space-charge equaion. This paper shows theoretically that the ratio of plate current to total current should be a function only of the ratio of grid to plate voltage, and introduces experimental data to show that the function can be represented by a single exponential term. The exponential function is combined with the sp... View full abstract»

• ### Tests on and performance of a high-speed multibreak 138-kV oil circuit breaker

Publication Year: 1938, Page(s):696 - 705
Cited by:  Papers (5)
| | PDF (4855 KB)

This entire program of field tests in connection with the development of this new high-speed interrupter has again demonstrated that no matter how skilled the designers may be, and with the most exhaustive research testing that is possible in factory testing laboratories, it is still necessary to look to actual high-capacity field tests for ultimate confirmation of circuit breaker designs and to b... View full abstract»

• ### A New Multibreak Interrupter for Fast-Clearing Oil Circuit Breakers

Publication Year: 1938, Page(s):705 - 712
Cited by:  Papers (7)
| | PDF (5432 KB)

A description of a new multibreak interrupter for fast clearing of short circuits applicable to high-voltage conventional tank-type oil circuit breakers. Breakers equipped with such interrupters were subjected to interrupting tests on large 138-kv and 230-kv systems during which short circuits as high as 2,000,000 kva were interrupted in less than five cycles. The results of those interrupting tes... View full abstract»

• ### A symbolic analysis of relay and switching circuits

Publication Year: 1938, Page(s):713 - 723
Cited by:  Papers (224)  |  Patents (3)
| | PDF (2395 KB)

In the control and protective circuits of complex electrical systems it is frequently necessary to make intricate interconnections of relay contacts and switches. Examples of these circuits occur in automatic telephone exchanges, industrial motor-control equipment, and in almost any circuits designed to perform complex operations automatically. In this article a mathematical analysis of certain of... View full abstract»

• ### Low-Voltage Fluorescent Lamps

Publication Year: 1938, Page(s):723 - 726
Cited by:  Papers (3)
| | PDF (2497 KB)

First Page of the Article
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• ### Graphical Field-Plotting Methods in Engineering

Publication Year: 1938, Page(s):727 - 732
Cited by:  Papers (8)
| | PDF (1254 KB)

First Page of the Article
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• ### Stability Characteristics of Turbine Generators

Publication Year: 1938, Page(s):732 - 744
Cited by:  Papers (12)
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First Page of the Article
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• ### Transmission Theory of Spherical Waves

Publication Year: 1938, Page(s):744 - 750
Cited by:  Papers (9)
| | PDF (1603 KB)

This paper formulates the essential properties of spherical waves in terms of familiar engineering concepts. The physical picture resulting from this point of view facilitates the solution of certain physical problems, notably those having to do with reflection, refraction, shielding and power absorption. View full abstract»

• ### An Analysis of the Induction Machine

Publication Year: 1938, Page(s):751 - 757
Cited by:  Papers (76)
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First Page of the Article
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• ### High-Voltage Gaseous and Fluorescent Tubes for Advertising and Architectural Lighting Effects

Publication Year: 1938, Page(s):758 - 762
| | PDF (5855 KB)

Rapid strides have been made in the field of high-voltage electrical-discharge tubes. The most recent development has been the use of fluorescent phenomena. Fluorescent materials were first introduced as an integral part of the glass. The New York World's Fair has made a number of installations of Claude Zeon fluorescent tubes in which the fluorescent materials are placed as a coating on the insid... View full abstract»

• ### Reactance of Square Tubular Bus Bars

Publication Year: 1938, Page(s):762 - 766
Cited by:  Papers (12)
| | PDF (1782 KB)

First Page of the Article
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• ### Absolute power factor of air capacitors

Publication Year: 1938, Page(s):766 - 773
Cited by:  Papers (6)
| | PDF (3069 KB)

In this investigation seven air capacitors of different types of construction were studied. In the preliminary tests it was determined that the power factor was independent of the voltage stress and that it varied with the separation of the plates. The results of these studies led to the development of a method of determining the absolute power factor of an air capacitor. In addition, data are pre... View full abstract»

• ### Basic Equations for Electric and Sound Radiations

Publication Year: 1938, Page(s):774 - 776
| | PDF (604 KB)

First Page of the Article
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• ### Amplitudes of Magnetomotive Force Harmonics for Fractional Slot Windings-I

Publication Year: 1938, Page(s):777 - 785
Cited by:  Papers (1)
| | PDF (2034 KB)

Fractional slot windings have certain well-known attributes which cause them to be quite generally used in synchronous-machine design. However, it is recognized that occasionally a winding will be produced which will develop harmonics in the air gap magnetomotive force that will lead to excessive losses, vibration, and noise. The published methods for computing the amplitudes of these harmonics ar... View full abstract»

• ### The Economic status of the Engineer

Publication Year: 1938, Page(s):786 - 790
| | PDF (1406 KB)

This is not a committee report, though perhaps it could be made to serve as such, because its genesis was a request of the engineer that a paper be written around the author's remark, The economic status of the engineer is largely a matter determined by each individual engineer according to his particular personal qualifications and the relations these bear to the work he does and to the persona... View full abstract»

• ### Section and Design of the Electrification of the San Francisco-Oakland Bay Bridge Railway

Publication Year: 1938, Page(s):791 - 796
| | PDF (1275 KB)

First Page of the Article
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• ### Reference Index

Publication Year: 1938, Page(s):797 - 806
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