What will the zero-sequence current when line to ground fault occurs and the current in faulted phase is 300 A?

ZERO sequence CURRENT in LG faultFor LG fault, all the sequence currents are equal.\({I_{R0}} = \FRAC{{{I_f}}}{3} = \frac{{300}}{3} = 100\;A\)WhereIR0 is the zero-sequence currentif is the fault currentType of faultPercentage of occurrenceZero sequence currentL-G70 – 80%Ia0 ≠ 0L-L15 – 20%Ia0 = 0L-L-G 10%Ia0 ≠ 0L-L-L<1%Ia0 = 0L-L-L-G2 – 3%Ia0 ≠ 0 The type of fault that includes ground has zero-sequence current.Like L-G, L-L-G, L-L-L-GImportance of Zero sequence current: In case of Ground faults like LG, LLG the fault current pass through the ground to the neutral and providing a relay between the neutral and ground, the zero sequence currents are passing through this relay for protection of electrical equipment like generator, transformer etc and the relay is called earth fault relay or ground fault relay.