While the crowbar function is engaged, the Type III DFG generator effectively becomes an induction generator, but with practical differences introduced by the substantially different pre-fault conditions possible. Unlike a Type I or II generator, which operate with a relatively small slip, a Type III generator can operate with a large slip (typically up to +/- 30%). Following application of the crowbar, the potentially large slip can create significant rotor-current-induced frequency components in the stator windings, producing sinusoidal fault current contributions that are not at the fundamental frequency. This condition can be observed in the first few cycles of fault current in Figure 6.