This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...those already in service when the safe currentcarrying capacity of the latter has been reached. 121. The Thury System.1--The series system, in which serieswound generators, regulated to give constant current, are connected in series, has thus far found no application in the United States, save in those now obsolete ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...those already in service when the safe currentcarrying capacity of the latter has been reached. 121. The Thury System.1--The series system, in which serieswound generators, regulated to give constant current, are connected in series, has thus far found no application in the United States, save in those now obsolete plants in which constant-current motors were supplied from high voltage arc circuits. But in Europe this system has been developed to a high state of perfection through the work of M. Thury, who has installed a number of plants operating on this principle, most of them in Switzerland, Hungary and Russia.2 In the Thury system the series-wound generators are driven at constant speed and the current is kept constant by a regulating device which shifts the brushes (though it may be arranged to vary the speed). The regulating device is actuated by a solenoid through which the main line current flows. A sufficient number of generators are connected in series to develop the voltage required by the load. The load consists of series motors, also connected in series, which in turn drive generators (generally 1 See also Chap. VII. s Jour. Institution of Electrical Engineers, Vol. XXXVIII, p. 471. Electrical World, Vol. LXIII, No. 11, p. 583 (1914). To Additional Motort alternators) for the supply of current at the receiving or distributing end of the line. In other words, the system is generally used for the transmission of power over considerable distances, as distinguished from merely local distribution. The individual generators are grouped in pairs, each pair being driven by a water wheel (or other prime mover). In plants now operating, the maximum voltage per commutator is about 3600 volts, though it is possible to design machines of this type to give ...
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Add this copy of Principles of Direct-Current Machines to cart. $9.95, good condition, Sold by ThriftBooks-Atlanta rated 5.0 out of 5 stars, ships from Austell, GA, UNITED STATES, published by McGraw-Hill.
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Add this copy of Principles of Direct-Current Machines (Electrical to cart. $18.00, very good condition, Sold by Gils Book Loft rated 4.0 out of 5 stars, ships from Binghamton, NY, UNITED STATES, published 1915 by McGraw-Hill c1915, 1919.
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Very Good+ Book Indexed. Lightly warped. Name stamped several places, incl top &bottom edges. Tight, solid diagrams, drawings. very good+, no dj, gold-stamped deep green cloth 460 pgs.
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