I have a Siemens switchgear with the nominal values of 15kV, 3000A and 750 MVA short circuit capacity at old STD C37.06-1987.
There is cell available with only 500 MVA short circuit capacity (K factor 1.3)with the same nominal voltages and currents.
Problem: The expected 3phase sc current is...
I have a 3winding-50MVA wye,wye,delta power transformer.
Ho is grounded through a surge arrester, Xo is grounded through a ground resistor and one point of the delta is solid grounded. The delta winding is only for grounding.
I would like to solid ground Ho
How can I model this...