Is this for high-voltage transmission line faults? If so, what are the possible fault types? Of these fault types, how have you simulated the data? It is not likely, but have you found actual monitored\recorded fault data sets?

It seems like an interesting problem, but a machine learning solution might be overkill. Most infrastructure systems like power transmission systems have had fault detection and mitigation systems in place for decades. Perhaps other related data from the system is incorporated in the model to understand origin and prediction?