Probability
of occurrence of all the three phase short circuited fault in transmission
system is
70%
20%
2 to 3%
50%
2 to 3%
Probability
of occurrence of all the three phase short circuited fault in transmission
system is approximately only 2 to 3%. Three phase fault is type of the
symmetrical fault.
L-G fault = 85%
L-L
fault = 10%
L-L-L
= 2-3%
Hence,
the correct option is (C).
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