Abstract
DR. WHITEHEAD, of Johns Hopkins University, communicates an interesting paper to the Journal of the Franklin Institute of September on the limitations of high voltage. Fifty years ago, it was thought that electrical transmission distances in America would never go much beyond 150 miles and that the economical voltage would not rise much above 110 kilo volts. The grounds for this opinion seem to have been that the distances between available sources of power, whether hydraulic or steam, were never greater than about 300 miles. At the present time, there are not many transmission systems for distances greater than 150 miles, but there are several working at 220 kilovolts. A conspicuous example is the Boulder Dam—Los Angeles transmission line over a distance of 300 miles at 287 kilovolts.
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Limitations of High-Voltage Insulation. Nature 141, 86 (1938). https://doi.org/10.1038/141086a0
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DOI: https://doi.org/10.1038/141086a0