Experimental Validation of Electrical Model Residual Voltage Test Circuit in Surge ArrestersM

This work proposes the adoption of an electric model for residual voltage tests in zinc oxide (ZnO) arresters for standardized and non-standardized waveforms, Lightning current waveform models already consolidated in the literature were used. The proposed model was validated by tests performed at the UFPA High and Extra High Voltage Laboratory (LEAT), n the tests, it was measured residual voltage and discharge current in the arrester. It was applied a discharge current of l0kA in the arrester with nominal voltage of 30kVrms. Additionally, simulations were performed in the ATP Draw software to evaluate the accuracy of the model for waveform 8/20µs. The resultant model was compared to the measurement results. The model proved to be satisfactory for all impulsive waveforms. The parameters of the model are easy to determine, and all necessary information for the lightning arrester and pulse generator is contained in manufacturers’ manuals and catalogs.