For a three-phase fault at the spark location in the figure below with all equipment three-phase and the generator of finite size, determine the symmetrical rms fault current: 

(1) In a 4.2-kV line coming from the transformer and 

(2) In an 11-kV line coming from the generator. Ignore the series resistances of the transformer and generator and assume all cables short with negligible R and X.

Transcribed Image Text:

Gen 100 MVA, 3-ph 11 kV, X = 18% 10 MVA, 3-ph, 11/4.2 -kV, Z = 7% moo ell lll 50 MVA, 11 kV propulsion loads Other loads