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IEEE C57.12.90 1999 Edition, June 26, 1999
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Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers
Additional Comments: ONLY AVAILABLE IN ELECTRONIC FORMAT
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This standard describes methods for performing tests specified in IEEE Std C57.12.00-1993 1 and other standards applicable to liquid-immersed distribution, power, and regulating transformers. It is intended for use as a basis for performance, safety, and the proper testing of such transformers.

This standard applies to all liquid-immersed transformers except instrument transformers, step-voltage and induction voltage regulators, arc furnace transformers, rectifier transformers, specialty transformers, grounding transformers, and mine transformers.

Transformer requirements and specific test criteria are not a part of this standard, but are contained in appropriate standards, such as IEEE Std C57.12.00-1993, ANSI C57.12.10-1988, IEEE Std C57.12.20-1996, ANSI C57.12.40-1994, or in user specifications.