IEEE C57.134-2024 PDF
This guide describes methodologies for determination of the steady-state winding hottest-spot temperature in dry-type distribution and power transformers. This guide applies to all dry-type transformers, including those with ventilated, sealed, solid cast, and encapsulated windings except transformers described as exceptions in IEEE Std C57.12.01.
This guide provides a uniform methodology for determination of winding hottest-spot temperature. The methods provide consistency in testing and calculations for manufacturers' verification of the winding hottest-spot temperature to the user, and for validation and review of winding hottest-spot temperature limits.
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