Surge arresters models for fast transients

In this paper is presented the performance of metal-oxide surge arresters, during fast transients. The simulations were carried out with the EMTP-ATP program. The equivalent circuits were those proposed by the IEEE and Pinceti-Giannettoni. The residual voltages of various rated voltages lightning arresters and for lightning currents with different peak values and front times were estimated. The results also been compared with the manufacturer´s data.