Thermal behaviour of different fuse enclosure packages in 24 kV.SF 6 main units

The thermal behaviour of several fuse enclosure packages (FEP) used in SF₆ ring main units has been studied. For such a study, the most common FEP arrangements have been modelled using the finite elements analysis technique. Model validation has been carried out by means of laboratory tests. Results of this study are shown and analysed. The obtained calculation model has been successfully applied to the study of several important aspects regarding both switchgear design and operation