General types of load tap changer (LTC) mechanisms, breathing configurations, and electrical designs, described for reference for determining methods of testing and evaluating dissolved gases in mineral-based transformer oils in LTCs, are discussed and recommended in this guide. Measurements of dissolved gas concentrations in the LTC oil are required to implement this guide. This guide is not manufacturer specific, rather category specific. ** Downloads file posted at http://standards.ieee.org/downloads/C57/C57.139-2015/
- Sponsor Committee
- PE/TR - Transformers
Learn More - Status
- Active Standard
- PAR Approval
- 2011-06-16
- Superseding
- C57.139-2010
- Board Approval
- 2015-12-05
- History
-
- ANSI Approved:
- 2017-06-12
- Published:
- 2016-04-29
Additional Resources
- Downloads
- C57.139-2015_downloads.zip
Working Group Details
- Society
- IEEE Power and Energy Society
Learn More - Sponsor Committee
- PE/TR - Transformers
Learn More - Working Group
-
InsFluid-WG57.139 - Insulating Fluids - DGA in LTCs Working Group
Learn More - IEEE Program Manager
- Malia Zaman
Contact - Working Group Chair
- Rainer Frotscher
PC57.139
Guide for the Interpretation of Gases generated in Liquid-Type Load Tap Changers
This guide describes methods of evaluating dissolved gases in insulating liquids used with load tap changers (LTCs). General types of LTC mechanisms, breathing configurations, and electrical design are included for evaluation criteria in determining when mechanical damage, deterioration or failure might have occurred.
No Active Standards
C57.139-2010
IEEE Guide for Dissolved Gas Analysis in Transformer Load Tap Changers
Methods of testing and evaluating dissolved gases in mineral based transformer oils found in Load Tap Changers (LTCs) are discussed and recommended in this guide. General types of LTC mechanisms, breathing configurations and electrical design are included as evaluation criteria for determining when mechanical damage or failure has occurred. Dissolved Gas of the LTC is required. This guide is not manufacturer specific, rather category specific. Additional files for download can be found at http://standards.ieee.org/downloads/C57/C57.139-2010/
No Inactive-Withdrawn Standards
No Inactive-Reserved Standards