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PC57.12.01 - IEEE Draft Standard for General Requirements for Dry-Type Distribution and Power Transformers

This standard is intended to serve as a basis for the establishment of performance, interchangeability, and safety requirements of equipment described, and for assistance in the proper selection of such equipment.This standard describes electrical, mechanical, and safety requirements of single and polyphase ventilated, non-ventilated, and sealed dry-type distribution and power transformers or autotransformers, with a voltage of 601 V 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
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