IEEE Standards IEEE C57.104-2019 pdf free download – IEEE Guide for the Interpretation of Gases Generated in Mineral Oil-Immersed T ransformers IEEE C57.104-2019 pdf free download - IEEE Guide for the Interpretation of Gases Generated in Mineral Oil-Immersed T ransformers. This guide is not apicable to lond tap changers (LTC) and to ranstomers with main tank insulating liquid... 02-24 Download Now