Thank you once again for your input and help!

@Gary B

I have not seen that in ETAP there is and impedance symbol so I realized I can model capacitor using impedance editor. I have expected there is and two nodes capacitor symbol so that confused me at first. So I did it and I am getting 230 A near that FMT CT. Value is strangely low imho. I am not sure if I made somekind of a mistake or something?

@tony stewart

Current is calculated based on data of the battery, the whole calculation is in the project except SC calculation. I hope I did not make a mistake taking that current into account when I was calculating adjustment of that overcurrent relay? Your answer will be also really valuable!