Transformer sizing — watch the system respond
Place a transformer, connect loads downstream, and watch: kVA requirement from the loads, voltage at downstream buses from the impedance, and fault current contribution throughout the system.
What you get
Transformer kVA requirement calculated from the loads you connect downstream.
Transformer impedance affects fault currents and voltage drop — see both in the model.
Secondary bus voltage calculated including transformer impedance and loading.
Change transformer impedance and watch fault currents change at every downstream bus.
See the relationship between transformer kVA rating and percent loading.
Change loads, change the transformer, observe the system-wide impact in real time.
Understand transformer impact by experimenting
A transformer affects everything downstream — voltage, fault current, loading. ekx lets you see all of these impacts in one model, updated live.
- Place a transformer and connect loads — kVA requirement calculates
- Change transformer impedance — see fault currents change downstream
- Increase loads — see transformer loading percentage increase
- Check secondary voltage under different loading conditions
Start free. Upgrade when you need more.
Free tier includes 1 project with up to 2 buses. Paid plans start at $27/month for consultants and $149/month for unlimited access.
View All PlansFrequently asked questions
A utility source, one transformer (e.g., 13.8kV to 480V), and a few loads. You'll see kVA loading, secondary voltage, and fault currents immediately.
Higher transformer impedance reduces downstream fault current but increases voltage drop under load. ekx shows both effects in the model.
Yes. Change the transformer kVA and impedance and see how it affects loading, voltage, and fault current throughout the system.
Yes. A source, transformer, and load is a 2-bus system, which fits within the free tier.
See how transformer selection affects your system.
kVA, impedance, voltage, fault current — all visible in one model.
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