Tools
Everything here runs on a real fault record in the browser. Bring a file and start reading it.
COMTRADE Viewer
Open a .cfg/.dat or .cff record in the browser and read the waveforms. No install, no desktop licence.
Phasor Diagram
Turn a fault record into voltage and current phasors, with sequence components, at any cursor position.
Impedance Trajectory & R-X Diagram
Plot the measured impedance through the fault against distance zones to see what the relay saw.
Fault Location Calculator
Takagi, Modified Takagi, and Novosel estimates computed from the record rather than from a settings sheet.
Or open the full workspace
Waveforms, phasors, harmonics, distance, differential, and overcurrent in one place, on the record you just uploaded.
Open the viewer