Which is the most common fault ouring in the power system?




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


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