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Record Nr. |
UNINA9910135768203321 |
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Titolo |
ANSI/IEEE Std C57.91-1981 : IEEE Guide for Loading Mineral-Oil-Immersed Overhead and Pad-Mounted Distribution Transformers Rated 500kVA and Less with 65 C or 55 C Average Winding Rise / / Institute of Electrical and Electronics Engineers |
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Pubbl/distr/stampa |
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New York, New York : , : IEEE, , 1981 |
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ISBN |
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Descrizione fisica |
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1 online resource (26 pages) |
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Disciplina |
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Soggetti |
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Electric transformers - Protection |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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General recommendations for loading 65 degrees Centigrade-rise mineral-oil-immersed overhead and pad-mounted distribution transformers are covered. Recommendations for 55 degrees Centigrade-rise transformers are included because a substantial percentage of these transformers are still in service. The recommendations are based on winding hottest-spot calculations only. Other factors that may limit the permissible load to lower values are listed. A method to establish winding temperature and loss of life by nomographs is given. |
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