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Record Nr. |
UNINA9910135769903321 |
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Titolo |
ANSI/IEEE Std C57.12.56-1986 : IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers / / Institute of Electrical and Electronics Engineers |
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Pubbl/distr/stampa |
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New York, New York : , : IEEE, , 1986 |
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ISBN |
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Descrizione fisica |
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1 online resource (20 pages) |
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Disciplina |
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Soggetti |
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Electric switchgear - Standards |
Standards, Engineering |
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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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This IEEE Standards product is part of the C57 family on Power Distribution and Regulating Transformers. A test procedure for determining the temperature classification of ventilated dry-type power and distribution transformer insulation systems by test rather than by chemical composition is established. The intent is to provide a uniform method for providing data for selection of the temperature classification of the insulation system, for providing data that may be used as a basis for a loading guide, and for comparative evaluation of different insulation systems. Voltage-withstand endpoint criteria are related to the impulse voltage distribution within the coil or to the initial voltage-withstand of the coil. A relationship between impulse withstand of the insulation and short-term 60-Hz-withstand is identified so that 50/60--Hz testing of model coils is possible. |
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