Figure 1: Faulting a Bus
There are three ways to fault a bus. The easiest way is to double-click on the desired bus. A fault will be placed on the bus using the options selected on the Short Circuit tab and in the Short Circuit Options dialog box.
Figure 1: Faulting a Bus
The results are immediately displayed on the one-line. In this example, the faulted bus current is 16.952 kA, which is shown diagonally on the right side of the bus. The contribution from the upstream branch is 14.616 kA, and the motor contribution is 1.201 kA.
If text results are also desired, select the appropriate result window in the Text Output tab of the Short Circuit Options dialog box.
Another way to initiate a fault is to first select a bus (the bus will highlight) and then click 
Fault Bus(es). You can select more than one bus to fault if desired.
To fault all the buses (batch fault), click Fault Bus(es) without selecting any buses.
The following currents can be calculated in EasyPower:
Momentary in the Short Circuit tab.You can view up to 3 types of fault current values by time interval.
Figure 2: Short Circuit Results at Various Time Intervals
You can also view fault currents in various forms, such as by phase current values (A, B, C) or their symmetrical component values (positive sequence, negative sequence, zero sequence or 3 times the zero sequence).
You can also display fault currents as symmetrical rms, asymmetrical rms or as peak. To change the display current type, on the Short Circuit tab, click 
SC Options, click the One-line Output tab, and then select the desired type in Fault Current, as shown in the figure below. The following choices are available:
The first three choices are applicable for any time interval, whereas the last choice is only applicable for the momentary (initial) currents.
Figure 3: Short Circuit Options for IEC
| IEC Short Circuit Reference | |
| Short Circuit Options (IEC) |
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