scope:

This part of IEC 62271 is applicable to single- and three-phase direct connections between gas185 insulated metal-enclosed switchgear (GIS) for rated voltages above 52 kV and transformer 186 arrangements to establish electrical and mechanical interchange ability and to determine the 187 limits of supply for the transformer connection. 188 Direct connections are immersed on one end in the transformer oil or insulating gas and on the 189 other end in the insulating gas of the switchgear. 190 Transformer arrangements are single-phase transformers with single-phase enclosed 191 arrangement, three-phase transformers with three single-phase enclosed arrangements or 192 three-phase transformers with a three-phase enclosed arrangement with three transformer 193 bushings. 194 The connection satisfies the requirements of IEC 62271-203 for gas-insulated metal-enclosed 195 switchgear, IEC 60076 for power transformer and IEC 60137 for completely immersed 196 bushings. 197 For the purposes of this document the term "switchgear" is used for "gas-insulated metal198 enclosed switchgear".