IEEE PC57.12.91

IEEE PC57.12.91 IEEE Draft Standard Test Code for Dry-Type Distribution and Power Transformers

This standard describes methods for performing tests specified in IEEE Std C.57.12.01 and other referenced standards applicable to dry-type distribution and power transformers, with a voltage of 601V or higher in the highest voltage winding. It is intended for use as a basis for performance, and the proper testing of dry-type distribution and power transformers.This standard applies to all dry-type transformers including those with solid cast and/or resin encapsulated windings except as follows:a) Instrument transformers b) Step-voltage and induction voltage regulators c) Arc furnace transformers d) Rectifier transformers e) Specialty transformers f) Mine transformers g) Testing Transformers h) Welding Transformers