Transformer health indices calculation considering hot-spot temperature and load index
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AuthorOrtiz Fernández, Félix; Ortiz Fernández, Alfredo; Delgado San Román, Fernando; Fernández Diego, Inmaculada; Santisteban Díaz, Agustín; Cavallini, Andrea
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IEEE Electrical Insulation Magazine, 2017, 33(2), 35-43
Institute of Electrical and Electronics Engineers Inc.
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Hot spot temperature
The state of a transformer depends on many parameters, which should be taken into account to determine its actual condition. In recent years what is known as health indices of transformers has been defined, which is a practical tool to assess the overall status of these electrical devices. Data from field inspection, laboratory tests, and observations during operation of the transformer are combined. All of these result in an index that provides fairly objective and quantitative information as to the condition of the transformer .
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