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.
- Sponsor Committee
- PE/TR - Transformers
Learn More - Status
- Superseded Standard
- Board Approval
- 1981-12-17
- History
-
- ANSI Approved:
- 1994-01-04
- Published:
- 1986-10-03
- Reaffirmed:
- 1998-09-16
Working Group Details
- Society
- IEEE Power and Energy Society
Learn More - Sponsor Committee
- PE/TR - Transformers
Learn More - Working Group
-
DryType-WGC57.12.56 - Dry Type Transformers - Thermal Eval. For Vented Dry-Type Insulation Working Group
Learn More - IEEE Program Manager
- Malia Zaman
Contact - Working Group Chair
- Richard Provost
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