Comtrade Viewer
COMTRADE analog trace viewer.
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Free
About
COMTRADE Viewer is an easy-to-use tool for viewing and analyzing power system event records. Display waveforms directly on your device.
Supported file formats include:
• COMTRADE (ASCII and Binary)
• SEL .cev, .eve, and .evzip event records
• SEL Motor Start Reports (.msr and .cmsr)
• Beckwith M-3425A, M-3430, and M-3311A .osc records
• S&C IntelliRupter Fault Interrupter records (.wfc)
• ATP/EMTP .pl4 files
Open files directly from Mail, Files, AirDrop, and other supported apps, or explore the included sample records to get started.
Built for power system engineers and technicians who need quick access to event records while in the field, at the office, or on the go.
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What's New in Comtrade Viewer
2.2.3
June 20, 2026
Added ability to open a zip file containing multiple records of any supported type. User then may select one of the records to view. This makes it convenient to group all related records in one compressed file that can be opened from mail or from the device storage.
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