IEEE PC57.12.01

Revision Standard - Active - Draft.
Electrical, mechanical, and safety requirements of ventilated, non-ventilated, and sealed dry-type distribution and power transformers or autotransformers (single and polyphase, with a voltage of 601 V or higher in the highest voltage winding) are described in this standard.

This standard defines the electrical and mechanical requirements of single and polyphase ventilated, nonventilated, and sealed dry-type distribution and power transformers or autotransformers, with a voltage of 601V or higher in the highest voltage winding. 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 and induction-voltage regulators c) Arc-furnace transformers d) Rectifier transformers e) Specialty and general-purpose transformers f) Mine transformers g) Testing transformers h) Welding transformers i) Drive transformers j) Inverter transformers
The purpose of this standard is to provide a basis for the establishment of the requirements for the performance and interchangeability of dry-type distribution and power transformers, and to assist engineers in the proper selection of the equipment described.