Download Electrical Energy its Generation Transmission and by Ernst Julius Berg PDF

By Ernst Julius Berg

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Extra info for Electrical Energy its Generation Transmission and Utilization

Example text

6. Ir and Ix are as above respectively in phase and 90 degrees ahead of the current 01. f. line. FIG. f. at the generating than in the previous case. larger Graphical solution for e , current lagging 30. , as might be the case, part of the load consisted of condensers or over-excited syn- If, is if chronous apparatus, the conditions would be as represented in Fig. 7. 's consumed by the line are respectively in "FiG. 7. of the current, resistance and the react- phase and 90 degrees ahead Graphical solution for e , current leading 30.

From this follows that when mission lines the inductive drop the charging current doubled. 5; thus the drop which is proportional to the current is one half. ) Where, therefore, the inductive drop is important, as in ELECTRICAL ENERGY 16 low potential transmissions and distributions, it is well to have as many circuits in parallel as possible where, on the contrary, the charging current is large, it is well to use as few lines ; as possible. FREQUENCY. amount of electrical power used in the generated at 25 or 60 cycles.

5; thus the drop which is proportional to the current is one half. ) Where, therefore, the inductive drop is important, as in ELECTRICAL ENERGY 16 low potential transmissions and distributions, it is well to have as many circuits in parallel as possible where, on the contrary, the charging current is large, it is well to use as few lines ; as possible. FREQUENCY. amount of electrical power used in the generated at 25 or 60 cycles. 5 or 15 cycles. By far the largest United States is be said, however, that 60 cycles is the standard and 25 the standard " power" frequency.

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