Consider a simple circuit configuration shown in Figure 9.24 to calculate the fault currents \(I_{1}, I_{2}\), and \(I\) with the switch closed.

(a) Compute \(E_{1}\) and \(E_{2}\) prior to the fault based on the prefault voltage \(V=1 \angle 0^{\circ}\) and then, with the switch closed, determine \(I_{1}, I_{2}\), and \(I\).

(b) Start by ignoring prefault currents, with \(E_{1}=E_{2}=1 \angle 0^{\circ}\). Then superimpose the load currents, which are the prefault currents, \(I_{1}=-I_{2}=1 \angle 0^{\circ}\). Compare the results with those of part (a).

Figure 9.24

Transcribed Image Text:

E + T m j0.1 V=1/0 1 j0.15 + E