This part of IEC 60076 is applicable to oil-immersed transformers. It describes the effect of operation under various ambient temperatures and load conditions on transformer life.
NOTE For furnace transformers, the manufacturer should be consulted in view of the peculiar loading profile.
IEC 60079-28:2006 history
1970IEC 60079-28:2006/ISH2:2019 Interpretation Sheet 2 - Explosive atmospheres - Part 28: Protection of equipment and transmission systems using optical radiation
2019IEC 60079-28:2015/ISH1:2019 Interpretation Sheet 1 - Explosive atmospheres - Part 28: Protection of equipment and transmission systems using optical radiation
0000 IEC 60079-28:2015 RLV
1970IEC 60079-28:2006/ISH1:2014 Intrepretation Sheet 1 - Explosive atmospheres - Part 28: Protection of equipment and transmission systems using optical radiation
2010IEC 60079-28:2006/COR1:2010 Explosive atmospheres - Part 28: Protection of equipment and transmission systems using optical radiation; Corrigendum 1
2006IEC 60079-28:2006 Explosive atmospheres - Part 28: Protection of equipment and transmission systems using optical radiation