IEEE C57.139 PDF
IEEE C57.139 PDF
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IEEE C57.139 PDF

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IEEE Guide for Dissolved Gas Analysis in Transformer Load Tap Changers

Published byPublication DateNumber of Pages
IEEE04/29/201645
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IEEE C57.139 – IEEE Guide for Dissolved Gas Analysis in Transformer Load Tap Changers

Revision Standard – Active.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/

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