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200 10$aANSI/IEEE Std C57.12.56-1986 $eIEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers /$fInstitute of Electrical and Electronics Engineers
210  1$aNew York, New York :$cIEEE,$d1986.
215   $a1 online resource (20 pages)
330   $aThis 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.
517   $aANSI/IEEE Std C57.12.56-1986: IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers
606   $aElectric switchgear$xStandards
606   $aStandards, Engineering
615  0$aElectric switchgear$xStandards.
615  0$aStandards, Engineering.
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