Comtrade Viewer

Comtrade Viewer

Free power system event record viewer for iOS and Android devices.

iOS

Current iOS Release: 2.2.2 (June 2026)

Comtrade Viewer 2.2.2 added support for SEL event records (.cev, .eve, and .evzip), SEL Motor Start Reports (.msr and .cmsr), Beckwith M-3425A, M-3430, and M-3311A .osc records, S&C IntelliRupter fault records (.wfc), and ATP/EMTP .pl4 files.

Comtrade Viewer 2.1.0 added phasor diagram, symmetrical components calculations, and R-X impedance plane plotting of loop impedances.

Supports direct imports of COMTRADE, SEL event records, Beckwith OSC records, IntelliRupter records, and ATP/EMTP PL4 files.

Android

Current Android Release: 3.2.2 (June 2026)

Comtrade Viewer 3.2.2 added support for SEL event records (.cev, .eve, and .evzip), SEL Motor Start Reports (.msr and .cmsr), Beckwith M-3425A, M-3430, and M-3311A .osc records, S&C IntelliRupter fault records (.wfc), and ATP/EMTP .pl4 files.

Comtrade Viewer 3.2.0 added phasor diagram, symmetrical components calculations, and R-X impedance plane plotting of loop impedances.

Supports Android 7 and later, bundled sample records, and direct imports of COMTRADE, SEL event records, Beckwith OSC records, IntelliRupter records, and ATP/EMTP PL4 files.

Supported Formats COMTRADE (.cfg + .dat) COMTRADE CFF (.cff) SEL (.cev, .eve, .evzip) SEL Motor Start (.msr, .cmsr) Beckwith OSC (.osc) S&C IntelliRupter (.wfc) ATP / EMTP PL4 (.pl4)