A New Method to Determine Distribution Transformer's Loss-of-Life - Garrity, Kevin Michael
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In electric utility service areas with extreme ambient temperatures, strong solar irradiation, and high electric loads, hot-spot temperatures in transformer windings often exceed the recommended 110° Celsius limit. Exceeding this limit can considerably reduce the insulation life of distribution transformers. Specifically, every 8° Celsius increase in temperature beyond the limit yields a doubling of the rate at which the insulation deteriorates, or a halving of the transformer life expectancy. Therefore, it is critical to include all of the heat sources when calculating the transformer hot-spot temperature and the associated loss-of-life.…mehr

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Produktbeschreibung
In electric utility service areas with extreme ambient temperatures, strong solar irradiation, and high electric loads, hot-spot temperatures in transformer windings often exceed the recommended 110° Celsius limit. Exceeding this limit can considerably reduce the insulation life of distribution transformers. Specifically, every 8° Celsius increase in temperature beyond the limit yields a doubling of the rate at which the insulation deteriorates, or a halving of the transformer life expectancy. Therefore, it is critical to include all of the heat sources when calculating the transformer hot-spot temperature and the associated loss-of-life.
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Autorenporträt
Dr. Kevin M. Garrity received a B.S.E.E. from Loyola Marymount University in May, 1983, a M.B.A. from Pepperdine University in August, 1985, and a PhD E.E. from University of Southern California in May, 2015. He has worked over 30 years as an electrical engineer at Los Angeles Department of Water and Power in various engineering design groups.