UNSYMMETRICAL FAULT CALCULATIONS – PART – 26 – DOUBLE LINE-TO-GROUND FAULT - PROBLEM

A 25 MVA, 11 kV, 50 Hz and three-phase generator has Z1 = j0.25 p,u., Z2 = j0.35 p,u., Z0 = j0.1 p.u. and Zn = 0.3 ohms. If a double line to ground fault occurs on Y and B phases. Calculate the line current, fault current, line to neutral voltages and line to line voltages during the occurrence of fault conditions.