We will simulate a sequence of events, starting with a single-line-to-ground fault at REUSENS 132kV. The program will simulate subsequent tripping and reclosing events until the fault is cleared or when no further tripping or reclosing events are forthcoming.
Normally a bus fault is cleared by differential relays. In this case, we assume the differential relays failed to trip, and the faulted bus has to be isolated by relays in the vicinity.
1. Click the right mouse button on the bus REUSENS 132kV. When the floating menu appears, select the Stepped Event Analysis | Single User-Defined Event command.
A dialog box will appear asking you to specify the initiating fault at t=0.
Mark the ‘1LG’ radio button.
Press OK.
2. Viewing the events.
A modeless dialog box displaying the events will appear. The relay operating time for the initiating event is shown on the one-line diagram.
Press the forward button 
on the toolbar to view
the next event.
When you reach the last event (event no. 5), the one-line diagram will look like this.
