IEEE C57.144 : 2004

Name: IEEE C57.144 : 2004
Brand: IEEE

Withdrawn

GUIDE FOR METRIC CONVERSION OF TRANSFORMER STANDARDS

Withdrawn date

10-17-2023

Published date

10-22-2004

Publisher

Institute of Electrical & Electronics Engineers

1. Overview
   1.1 Scope
   1.2 Purpose
2. References
3. Guidelines
   3.1 Application of converted values
   3.2 "Hard" and "soft" conversion
   3.3 Use convenient numbers
   3.4 Convert fractions
   3.5 Determine tolerance
   3.6 Maintain original minimums and maximums
   3.7 Significant digits should be less than 10% of the
        overall tolerance
   3.8 Method for conversion of toleranced values
   3.9 Gauge and absolute pressure
   3.10 Maintain significant digits
   3.11 The precision of a value
   3.12 Trade sizes
   3.13 Standard for rounding
   3.14 Conversion math
   3.15 Writing unit symbols
   3.16 Capitalization
   3.17 Units of force and mass
   3.18 Specifying a quantity with a tolerance
   3.19 Dual dimensioning
   3.20 Temperature conversion
   3.21 Default tolerances
   3.22 Convenience and drawing clarity
   3.23 Separate + and - tolerances
   3.24 Safety issues
Annex A (normative) Conversion of quantities common to
                    transformer standards
Annex B (normative) Guideline background and development
Annex C (informative) Bibliography

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.

DocumentType	Standard
PublisherName	Institute of Electrical & Electronics Engineers
Status	Withdrawn

IEEE C57.12.39-2017

IEEE Standard for Requirements for Distribution Transformer Tank Pressure Coordination

CSA Z234.1 : 0	METRIC PRACTICE GUIDE
IEEE/ASTM SI_10-2010	American National Standard for Metric Practice
IEEE 268-1992	American National Standard for Metric Practice