files, excel-files or comtrade-files for further investigations by the customer and/or thetransformer manufacturer.The study does not include the calculation of overvoltages and oscillations within thetransformer windings. The outcome of the study might be that some switching actions areprohibited due to excessive VFT overvoltages.The simulation model of the GIS includes the coupling of the traveling waves to the systemenclosure-ground at the SF6-to-air bushings. The calculation of the amplitudes of thetransient enclosure voltages (TEV) is not part of this study.