By Topic

# Transactions of the American Institute of Electrical Engineers

## Filter Results

Displaying Results 1 - 25 of 54
• ### [Breaker page]

Publication Year: 1914, Page(s): nil1
| PDF (424 KB)
• ### [Breaker page]

Publication Year: 1914, Page(s): nil2
| PDF (25 KB)
• ### [Breaker page]

Publication Year: 1914, Page(s): nil3
| PDF (14 KB)
• ### Officers and Board of Directors 1913-1914

Publication Year: 1914, Page(s): i
| PDF (83 KB)
• ### Standing Committees

Publication Year: 1914, Page(s):ii - vi
| PDF (593 KB)
• ### Contents

Publication Year: 1914, Page(s):vii - viii
| PDF (198 KB)
• ### Sources of Direct Current for Electrochemical Processes

Publication Year: 1914, Page(s):1 - 22
| | PDF (2535 KB)

The problem involved in producing direct current for electrochemical processes is outlined, and the difficulties are pointedout. Of the methods of power supply using steam turbines that are available, it is shown that: (a) Direct-connected d-c. turbo-generators are available only in relatively small units, and cannot be designed as conservatively from the commutation standpoint as is desirable. (d... View full abstract»

• ### Protective Reactance in Large Power Stations

Publication Year: 1914, Page(s):23 - 55
Cited by:  Papers (1)
| | PDF (3276 KB)

The concentration of a large generating capacity on the busbars of a single power station demands protection against an excessive flow of current into an accidental fault. Reactance coils can be used in various ways to limit the instantaneous current flow. Reactance coils in the generator leads, while limiting the flow of current from the different generators, are not efficient for limiting the cu... View full abstract»

• ### Outdoor vs. Indoor Substations

Publication Year: 1914, Page(s):57 - 63
| | PDF (687 KB)

The development of the outdoor substation vs. the indoor type is an interesting commentary on the adaptability of engineering progress to new fields and the subject is briefly recapitulated in this paper, in line with the developments and application of this branch of transmission work. The causes for development of this apparatus, together with a general description of the classes of apparatus in... View full abstract»

• ### Outdoor Substations in New England

Publication Year: 1914, Page(s):65 - 69
| | PDF (1601 KB)

The present development of outdoor switching apparatus and transformers for systems of 110,000 volts or less is such as to make their use entirely successful, and in most transformer substations, a considerable saving in first cost can be accomplished without increase in operating expenses, by making use of this type of equipment. This paper gives a brief description of two substations of 10,000 k... View full abstract»

• ### Indoor and Outdoor Substations in Pennsylvania

Publication Year: 1914, Page(s):71 - 87
| | PDF (4741 KB)

This paper covers some points in substation design for installations for the lower voltages, including choice of location, type of building and arrangement of electrical apparatus. The subject is treated in three divisions, namely: customers' substations fed from the distribution system, customers' substations fed from the transmission system and company's substations. Attention is called to some ... View full abstract»

• ### Outdoor Substations in the Middle West

Publication Year: 1914, Page(s):89 - 103
| | PDF (2654 KB)

Conditions in the Middle West, particularly in the agricultural districts, have often been such as to necessitate the construction of small 33,000-volt outdoor substations in order to make the supply of current commercially practicable. These stations have been constructed with very simple switching and protective equipment, and economy of design and protection to the main line have been the domin... View full abstract»

• ### Problems of High-Tension Transmission Lines

Publication Year: 1914, Page(s):105 - 129
| PDF (2720 KB)
• ### Practical Operation of Suspension Insulators

Publication Year: 1914, Page(s):131 - 154
| | PDF (2685 KB)

The paper describes some of the mechanical and electrical problems which have been experienced on high-voltage transmission lines equipped with suspension insulators and points out some of the principles involved and some practical methods for guarding against the troubles. Figures are given showing the deflections which will take place, for various sizes of aluminum and copper conductors, at the ... View full abstract»

• ### The Economical Capacity of a Combined Hydroelectric and Steam Power Plant

Publication Year: 1914, Page(s):155 - 192
| | PDF (3381 KB)

This paper develops a general method for determining the economical capacity of a combined steam and hydroelectric development. The method involves the use of two curves??one, the Percent-Deficiency,'' giving the stream regimen, the other, the Percent-Load,'' giving the characteristics of the load. The first curve gives the percent-deficiency of the water for any stream-flow, and hence fixes d... View full abstract»

• ### The Cost of Electricity at the Source

Publication Year: 1914, Page(s):193 - 210
| | PDF (1803 KB)

The Stott-Gorsuch method is applied to the determination of the cost of manufacturing electricity in a 60-cycle station of 100,000 kilowatts installed capacity. The results correspond to the assumption that such a station is capable of delivering from 350,000,000 to 700,000,000 kelvins per annum for load factors ranging from 0.50 to 1.00. For unity load factor the cost of three-phase electricity a... View full abstract»

• ### Distribution of Electrical Energy

Publication Year: 1914, Page(s):211 - 282
| PDF (8123 KB)
• ### Recording Devices

Publication Year: 1914, Page(s):283 - 292
| | PDF (1100 KB)

The author calls attention to the importance of keeping records in electrical systems and points out that proper records can be secured only by automatic recording devices, largely because of the uncertainty of the pemonal element in times of accident or stress. The three types of recording devices in general use are those having a revolving disk, those using an endless tape or photo-film, and the... View full abstract»

• ### The Present Status of Aluminum-Cell Lightning Arresters

Publication Year: 1914, Page(s):293 - 308
Cited by:  Papers (1)
| | PDF (1883 KB)

This paper gives a brief survey of the conditions of operation of aluminum-cell arresters, without any description of the forms of the arresters. References are made to recent investigations of lightning phenomena and their possible effects on the design of protective apparatus used at present. The d-c. aluminum arrester is most economical and represents the highest possible grade of protection. I... View full abstract»

• ### Traffic Studies in Automatic-Switchboard Telephone Systems

Publication Year: 1914, Page(s):309 - 318
| | PDF (1184 KB)

The paper describes a telephone traffic recording machine by means of which not only the number of calls for a given period., but also the average duration of each call, is mechanically registered on a moving tape. The observations recorded here were taken on an automatic telephone system. The graphical record shows the exact duration of each connection, the number of connections made during a giv... View full abstract»

• ### A Comparison of the Telegraph with the Telephone as a Means of Communication in Steam Railroad Operation

Publication Year: 1914, Page(s):319 - 351
| | PDF (3942 KB)

Brief historical descriptions of the use of the telegraph and the telephone on railroads are given, the first train having been handled by telegraph in 1851 and the first handling of trains by telephone on long stretches of main line track having started as late as 1907. In comparison with the telegraph, the telephone circuits cost more to install and operate, but effect a saving in the operation ... View full abstract»

• ### Sixty-Cycle Synchronous Converters

Publication Year: 1914, Page(s):353 - 365
| | PDF (1174 KB)

The paper describes some 60-cycle, six-phase, 600-volt, synchronous converters used in railway substations in the suburbs of Cleveland. The advantages of the use of 60-cycle apparatus include standardization of frequency, low cost and high efficiency. The converters are of the commutating pole type and a number of special features of their design are described. The improvement of commutation due t... View full abstract»

• ### Mine Duty Controllers

Publication Year: 1914, Page(s):367 - 384
| | PDF (3280 KB)

The paper is devoted to discussion of the advisable types of control to be used for various mining equipment, particularly in bituminous coal mines. Complexity and theoretical details have been eliminated as far as practicable with the idea of impressing on the reader the need for certain definite features, without going into the theoretical details of these features. Electric controllers for equi... View full abstract»

• ### Self-Contained Portable Electric Mine Lamps

Publication Year: 1914, Page(s):385 - 401
| | PDF (2184 KB)

The considerable number of mine explosions caused by defects of the Davy safety lamps has encouraged the development of electric lamps. Satisfactory results, however, have been obtained only since the invention of the tungsten lamp, permitting the use of smaller storage batteries. The general requirements for electric lamps are: absolute safety, uninterrupted production of light for at least one s... View full abstract»

• ### The Development of the Electric Mine Locomotive

Publication Year: 1914, Page(s):403 - 429
| | PDF (7912 KB)

The paper traces, largely by means of pictures, the course that has been followed in developing the mine locomotive to its present condition. The paper is limited to locomotives for operation in coal mines. The two main factors which have directed the development are, first, the demand for increased entry capacity, and second, the exploitation of thin seams. The early machines were high, and of ir... View full abstract»