Build the network once.
The AI runs every study with you.
Phasor is a power system analysis application with a built-in AI engineer. Power flow, short circuit, protection grading and harmonics all read one model. The in-app agent can build the model, run the studies and explain the results with citations. All calculations run on your computer: no upload, no queue, no per-study license.
v0.3.1 · 31.9 MB · all platforms and checksums
- Engine
- Solves on your computer
- AI agent
- Reads the model, runs studies
- Studies
- Five solvers, one model
- Platforms
- macOS · Windows
A real converged run on a real network: six violations found, the worst bus named, and each number traceable to the model. Click a capture on this page to see it at full size.
What it does
Eight capabilities, one network
Each study reads the model that you already built. Change a cable length, and the voltage, the fault level, the grading margin and the impedance profile all change with it. The AI agent can run these studies for you and explain what changed.
- Anthropic · OpenAI · MCP
AI Agent
An engineer-grade agent inside the application. It reads your model, builds and runs studies, and explains the results with the numbers and clauses that it used. Bring your own API key; nothing else leaves your computer.
AI Agent docsAI Agent - Newton–Raphson
Power Flow
Full Newton–Raphson solution of the steady-state network, with tap changers and generator limits applied. Reports bus voltages, angles, branch flows and losses.
Power Flow docsPower Flow - IEC 60909
Short Circuit
Balanced and unbalanced fault currents from sequence impedances, with the initial, peak and breaking values that a switchgear rating needs.
Short Circuit docsShort Circuit - IEC 60255 · IEEE C37.112
Protection & TCC Curves
Put relay, fuse and breaker curves on one log-log plot. Check the grading margins against the fault levels that you calculated.
Protection & TCC Curves docsProtection & TCC Curves - Positive sequence · IEEE 519 context
Harmonics
Driving-point frequency scan plus Norton-source penetration. Gives resonance candidates, and voltage THD when you supply the spectra.
Harmonics docsHarmonics - IEC 60617 symbols
SLD Editor
Draw the single-line diagram and the model at the same time. Each symbol is the element that the solvers read. The layout is yours; nothing moves on its own.
SLD Editor docsSLD Editor - WGS 84 · GeoJSON
GIS View
Put the same network on real geography, for route lengths, span checks and field context. Results color the map with the same scale as the diagram.
GIS View docsGIS View Screenshot pending - Topology
Graph Space
A force-directed view of the pure connectivity — no coordinates, no clutter. It finds topological islands, radial paths, and loops that you did not intend.
Graph Space docsGraph Space
AI agent
An AI engineer inside the application
This is not a chatbot added to a solver. The agent works on the same model that you do. Ask why bus 12 is at 0.93 pu: the agent examines the network, runs the study, and answers with the numbers and the clause that it used. Ask it to set up a protection study: it uses the same command gate as your own edits, so you can review and undo each change. It runs on your own Anthropic or OpenAI key. The key stays on your computer, and nothing else leaves it.
- Reads the model and the results, runs studies, and explains with citations
- Each model change goes through the command gate — you can review it and undo it
- Bring your own key: Anthropic or OpenAI, stored on your computer
- The same tools are available over MCP, so your scripts and agents can control Phasor too
Authoring
The diagram is the model
Drag a transformer onto the canvas and you create a transformer — not a picture of one. The impedances, the tap ranges and the vector groups are properties of the symbol that you placed. The solvers read the data directly from it. Your layout is your data: Phasor never rearranges a diagram that you positioned.
- Busbars extend to their connections — you do not draw them again
- Voltage-level colors and result heatmaps on the same canvas
- Each edit goes through one command gate, so undo always works
Topology
See the connectivity, not the drawing
Graph Space removes the geography and the layout. It shows the network as what it is electrically: nodes and edges. Islands move apart on the screen. Radial feeders become trees. A parallel path that you did not intend is visible long before a solver stops on it.
- Finds and labels topological islands while you edit
- Trace the path from any bus back to its source
- Find the loop that changed a radial feeder into a mesh
Learning center
Learn the concepts behind the studies
Short pages that each explain one power system concept in plain English, with an interactive diagram you can play with. Free to read — no download needed.
Fundamentals
8 pagesThe quantities that every study uses: phasors, three-phase power, impedance and per-unit values.
Power flow
8 pagesHow a solver finds the voltage at each bus, and how to read the result.
Faults & protection
13 pagesShort-circuit currents, symmetrical components, and the relay settings that clear a fault.
Power quality
8 pagesHarmonics, unbalance, resonance, and the voltage sag that a large motor causes.
Network topology
2 pagesIslands, radial feeders, rings and meshes — the shape of the network.
Install it and open your own network
The download is one application. There is no server to set up and no per-seat license. Your models stay in files that you can put under version control. Add your Anthropic or OpenAI key, and the AI agent is ready too.