Tunç, EmreFidan, Murat2024-09-252024-09-252023979-835036049-3https://doi.org/10.1109/ELECO60389.2023.10415938https://hdl.handle.net/20.500.12491/1230614th International Conference on Electrical and Electronics Engineering, ELECO 2023 -- 30 November 2023 through 2 December 2023 -- Virtual, Bursa -- 197135Overvoltages can cause various malfunctions in electrical power systems and high voltage facilities. Metal oxide surge arresters (MOSAs) are used to prevent overvoltage-related malfunctions in electrical power systems and high voltage facilities. MOSAs protect the system from high amplitude currents by conducting overvoltage-induced discharge currents through themselves to ground in the network to which they are connected. Residual voltage tests of MOSAs are carried out with lightning impulse current in 8/20 ?s waveform according to IEC 60099-4 standards. In this study, residual voltage tests of a 4.5 kV metal oxide surge arrester (MOSA) were carried out by producing 2.5 kA, 5 kA and 10 kA impulse currents with an impulse current generator (ICG) with 24 kV and 2.9 kJ label values. As a result of the experiments carried out according to IEC 60099-4 standards, it was concluded that the residual voltage of the MOSA is within the limits guaranteed by the manufacturer. © 2023 IEEE.eninfo:eu-repo/semantics/closedAccess8/20 µsImpulse Current GeneratorResidual VoltageSurge ArresterConference Object10.1109/ELECO60389.2023.10415938152-s2.0-85185846585N/A