IEEE C57.12.91-1979
IEEE Standard Test Code for Dry-Type Distribution and Power Transformers
standard by IEEE, 12/14/1979
Full Description
New IEEE Standard - Superseded.Methods for performing tests specified in IEEE Std C57.12.01-1989 and other referenced standards applicable to dry-type distribution and power transformers are described. This standard is intended for use as a basis for performance, safety, and the proper testing of dry-type distribution and power transformers. This standard applies to all dry-type transformers except instrument transformers, step-voltage and induction voltage regulators, arc furnace transformers, rectifier transformers, specialty transformers, and mine transformers.