UNSYMMETRICAL FAULT CALCULATIONS – PART – 24 – DOUBLE LINE-TO-GROUND FAULT – PROBLEM

PROBLEM

A 25 MVA, 11 kV, 50 Hz and three-phase generator has Z1 = j0.2 p,u., Z2 = j0.2 p,u. and Z0 = j0.05 p.u. If a double line to ground fault occurs on Y and B phases. Calculate the line current, fault current and line to neutral voltages during the occurrence of fault conditions