L-G fault current calculations (IEC 60909-0) and TR 60909-4 2021

[Anonymous user]

How does IEC 60909-0 and IEC TR 60909-4 calculated L-G fault values? I do not see the value of 3 Zn. I can only see Z1+Z2+Z0. Where is 3Zn? If I have a separate PE conductor with my phase conductors, how is the L-G fault current calculated in IEC 60909? In Scope Sec 1 of IEC 60909, it says that "A single line to earth fault is beyond the scope of this part of IEC 60909."

[S-W]

@Anonymous user , pardon for the delayed response. Thank you for your message and patience, we'll come back to you!