In this question two three phase in parallel are connected and the total line current is calculated.
Correction: In this question, two values of the line to line voltage were given by mistake, i.e. 4.16kV (in the drawing) and 4.6kV (in the question text) so at 6:35 the current value can be:
I = 649.6kVA/(SQRT(3)*4.16kV) = 90.16A or
I = 649.6kVA/(SQRT(3)*4.6kV) = 81.35A
