Power system studies shouldn't take all day
ekx is a web-based single line diagram tool with built-in load flow, short-circuit analysis, and automatic equipment sizing. Build the one-line, get results instantly, and stop paying for software that crashes. Built by a practicing engineer for engineers who'd rather design systems than fight their software.
You already know the problem
Desktop study tools were designed in the 90s and it shows. ekx is what they'd look like if someone started over today.
Open a browser. Start working. No license servers, no IT tickets, no waiting for a dongle to ship. Your laptop is enough.
Short circuit and load flow update live as you build the model. Change a motor HP and watch cable sizes adjust automatically per National Electrical Code.
We do three things: short circuit, load flow, and auto equipment sizing. That focus is why ekx is fast and the other tools aren't.
Built by a practicing engineer for engineers who'd rather design systems than fight their software.
Bus voltages, branch flows, and system losses
Voltage drop analysis across your entire system
What-if scenarios to compare loading across different configurations
Three-phase and line-to-ground fault duties
Momentary, interrupting, and symmetrical values at each bus
Automatic duty checks against device ratings
Cable, breaker, and transformer sizing per NEC — automatic
Sizes update live as you change the model
Override any auto-sized value when engineering judgment says so
How it works
Three steps. No installations. Results in minutes, not hours.
Build the one-line
Drag, drop, connect. Add device data from built-in libraries or paste from a spreadsheet. No training course required.
- Drag-and-drop diagram builder
- Built-in device libraries
- Excel/CSV import
Get results instantly
Short circuit and load flow run on every change. Equipment sizes update automatically per NEC. No waiting.
- Live short circuit and load flow
- Auto equipment sizing per NEC
- Compare scenarios side-by-side
Export and deliver
Review flagged issues, export one-line diagrams, and generate reports. One click.
- PDF one-line diagrams
- Professional study reports
- One-click export
You've been putting up with this
Start free. No credit card.
Build a project and run your first study in minutes. Upgrade when you need more.
Questions you probably have
For short circuit, load flow, and equipment sizing — yes. We don't do protection coordination, harmonic analysis, or transient stability. We do three things and we do them fast. If that's what you need, you don't need a $10K desktop license.
Short circuit uses IEC 60909-based calculations and automated regression tests against PandaPower expected-result fixtures for representative commercial and industrial systems. Load flow uses Newton-Raphson. Equipment sizing follows NEC 2023. Full method documentation is available in our docs.
No admin rights or installs needed — it runs entirely in the browser. The only thing that could stop you is a corporate firewall blocking the site. If your network allows general web access, you're good.
You do. Export your models, diagrams, and reports anytime. Your projects are private by default. All data is encrypted at rest and in transit.
No. The diagram is the model. When you place a transformer and connect it, ekx knows its impedance, ratings, and where it sits in the system. The one-line isn't a picture — it's a live electrical model.
Stop fighting your legacy software.
Build the one-line, get short circuit and load flow results, and auto-size your equipment. Takes minutes, not days.
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