This technical report describes the relationship between gas-insulated enclosure switchgear with a rated voltage of 72.5 kV or more meeting the requirements of IEC 60517 and power transformers meeting the requirements of KS C IEC 60076 and mounted on fully submerged bushings meeting the requirements of KS C IEC 60137. Applicable to single phase connection assembly. At this time, one end of the bushing is immersed in transformer oil, and the other end is immersed in the insulating gas of the switchgear. The purpose of this technical report is to establish electrical and mechanical intercompatibility in the interface devices of these connection assemblies and to determine the limits of supply.Necessary In this case, the relevant IEC standards are established or revised. For the purpose of this technical report, the term “gas-insulated metal enclosure switchgear” will be used as “switchgear”.?
KS C IEC 61639:2014 history
2019KS C IEC 61639-2019 Direct connection between power transformers and gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above
2014KS C IEC 61639:2014 Direct connection between power transformers and gas-insulated metal-enclosed switchgear for rated voltages of 72.5 kV and above