The most common fault occurring in the power system is a Single line to ground fault. Almost 70 per cent of faults occurring is Single line to ground faults.
Fault | Probability of occurrence. |
Single line to ground fault | 0.70 |
Line to line fault | 0.15 |
Double line to ground fault | 0.10 |
Line to line to line fault (Three phases are short-circuited) | 0.02-0.03 |
Three line to ground fault | 0.02-0.03 |