scope:

The intent of this guide is to assist the working groups within the IEEE Transformers Committee; thus, specific examples were taken from the transformer-related standards. It should be recognized that identification of general principles and procedures could have broader application.

Purpose

The purpose of this guide is to assist Transformer Working Groups in the interpretation of IEEE/ ASTM SI 10^TM-2002¹ and other appropriate standards as they convert their documents to the use of SI units. This guide is concerned only with the conversion of existing standards, where a manufacturer's product that meets the existing standard's limits in U.S. Customary units will always meet the new standard's limits in SI units. With the exception of a few very specific examples in A.3, there has been no attempt to make the metric values more rounded or more convenient. Making such changes to a standard may affect the qualification of existing designs and should come only from a consensus of the interested parties in the appropriate working groups.

¹Information on references can be found in Clause 2.