Coming from ANSI short circuit? Here is the method
ekx calculates three-phase fault current with PandaPower's IEC 60909 method. It does not apply ANSI C37 momentary or interrupting multiplying factors. Duty checks against device ratings run automatically.
What you get
Short circuit uses PandaPower's IEC 60909 calculation for three-phase faults at every bus.
Peak (ip) fault current from the IEC 60909 kappa factor, for close-and-latch and withstand evaluation.
Start every bus at a fixed percent of nominal (100% by default), the basis most North American studies use, or at the IEC voltage factor of 1.10.
Initial symmetrical (Ik'') fault current for breaker and fuse interrupting rating checks.
Device ratings compared against calculated fault duties automatically. No manual checks.
Run short circuit from the diagram header; results appear on the one-line.
What changes if you are used to ANSI
IEC 60909 and ANSI C37 treat decaying motor contribution and asymmetry differently. When you check ekx against another tool, compare results on the same method and pre-fault basis.
- Initial symmetrical and peak values at every bus
- Device duty checks run automatically on each short-circuit run
- Three-phase faults; line-to-ground is not available yet
- Choose a fixed or IEC pre-fault voltage per project
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View All PlansFrequently asked questions
No. ekx uses IEC 60909. It reports initial symmetrical (Ik'') and peak (ip) currents, not ANSI first-cycle and interrupting duties with C37 multiplying factors.
Yes, for the pre-fault basis. Choose a fixed percent of nominal in Diagram settings, Short Circuit tab. New projects start at 100%, the basis ETAP and most North American studies use.
The R/X ratio of the impedance at the fault sets the IEC 60909 kappa factor, which gives the peak current.
Yes. Paid plans export a short circuit study report with the fault current values and device duty evaluations.
Short circuit with a clearly stated method.
IEC 60909 initial and peak values. Automatic duty checks.