IEEE C57.12.10

Abstract

This voluntary consensus standard sets forth the requirements for power transformer application. This standard is intended to be used as a basis for performance, interchangeability, and safety of the equipment covered and to assist in the proper selection of such equipment. <br>This document is a product standard that covers certain electrical, dimensional, and mechanical characteristics of 50 Hz and 60 Hz, liquid-immersed power transformers and autotransformers. Such power transformers may be remotely or integrally associated with either primary switchgear or substations, or both, for step-down or step-up purposes and base rated as follows: 833 kVA and above single-phase, 750 kVA and above three-phase. <br>This standard applies to all liquid-immersed power transformers and autotransformers that do not belong to the following types of apparatus: <br>a) Instrument transformers <br>b) Step voltage and induction voltage regulators <br>c) Arc-furnace transformers <br>d) Rectifier transformers <br>e) Specialty transformers <br>f) Grounding transformers <br>g) Mobile transformers <br>h) Mine transformers <br><strong>Mandatory requirements</strong> <br>When this standard is used on a mandatory basis, the words <em>shall</em> and <em>must</em> indicate mandatory requirements, and the words <em>should</em> and <em>may</em> refer to matters that are recommended and permitted, respectively, but not mandatory. <br>NOTE&#8212;The introduction of this standard describes the circumstances under which the document may be used on a mandatory basis.¹ <br>¹ Notes in text, tables, and figures of a standard are given for information only and do not contain requirements needed to implement the standard.