scope:

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 601 V or higher in the highest voltage winding.² It is intended for use as a basis for performance and for 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 and General Purpose transformers

f) Mine transformers

g) Testing transformers

h) Welding transformers

NOTE-Where IEEE standards do not exist for the transformers mentioned above or for other special transformers, this standard may be applicable as a whole or in parts subject to agreement between the parties responsible for the application and for the design of the transformer.³

Purpose

The purpose of this standard is to provide information regarding the procedures for the testing of dry-type transformers. Transformer requirements and specific test criteria are not a part of this standard but are contained in appropriate standards such as IEEE Std C57.12.01 or in user specifications.

² Information on normative references can be found in Clause 2.

³ Notes in text, tables, and figures are given for information only and do not contain requirements needed to implement the standard.