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The Regulation of Transformers on Three-Phase Systems with Load on One Phase Only
Get PDFIn considering the selection of a thesis subject my attention was directed by the chapter in "Alternating Current Phenomena" by Dr. Charles P. Stinmetz headed "Transformation of Polyphase Systems." Many of the conditions obtained in unbalanced polyphase systems, while generally taken for granted, are not so backed up by published data as to give to the young engineering student any records upon which the statements given are based.
This, together with the fact that the regular College Course as given must of necessity deal only with fundamentals, with but few digressions into the detail of any specific class of phenomena, caused me to selected for my thesis the investigation of; first, polyphase currents in general and second, a few specific instances of loading one phase only of a three phase system.</p
Report of the Pasadena Municipal Lighting Works
Get PDFA proposal was made by Mr. Thum to President Scherer that certain of the students of Throop Polytechnic Institute be given the task of making a report on the Municipal Lighting Works of Pasadena. For expenditures in connection with such a report Mr. Thum very kindly offered to deposit a certain sum with the Institute. This offer was taken under consideration by the Faculty, and upon investigation of the time at the disposal of the various students, the problem was placed before the Senior Class as an elective subject for a thesis.
This offer the Senior Class was very glad to accept, and work was commenced at the beginning of the second semester of the year 1910-1911. A rough outline of the various items to be taken up in such a report was furnished by Prof. Sorensen and later suggestions were made by Dean Damon. As actually accomplished, the work covers a detailed description of the plant and distribution system with drawings and maps, an appraisement of the property, a summary of segregated costs, capacities, etc., a statement of the general methods employed in financing public utilities, various suggestions as to possible improvements, and a partial description of the accounting system in use by the Municipal Lighting Works.
The figures found in the summary may be considered as accurate to within five per cent. of the cost of the plant altho sufficient time was not available for a detailed study of this phase of the problem. The idea has been rather to obtain data from which rough estimates of similar equipment could be made.</p