Name: Covenant Systems
Address: US
Price range: $$

Question 1

Does my event file get uploaded anywhere?

Accepted Answer

No. Parsing, phasor extraction and fault classification all run in your browser using local JavaScript. The file never leaves your machine and there is no server call involved — which matters because fault records are frequently considered confidential in utility environments.

Question 2

Which file formats can I load?

Accepted Answer

This browser tool reads IEEE C37.111 COMTRADE records — the .cfg configuration file paired with its .dat data file, in ASCII, BINARY, BINARY32 or FLOAT32 form. Most SEL relays and AcSELerator can export COMTRADE. Native SEL .CEV and .EVE parsing lives in our desktop build; get in touch if you need it.

Question 3

How is the fault type determined?

Accepted Answer

From the samples themselves, not from metadata. The tool takes one-cycle Fourier phasors of each channel before and after the trigger, flags the phases whose current rises meaningfully above load, and checks the residual (3I0) to decide whether ground is involved. That combination gives the classification — for example two faulted phases with residual current is a double line-to-ground fault.

Question 4

How is the distance to fault calculated?

Accepted Answer

The tool selects the correct measuring loop for the fault type, the same way a distance element does: the ground loop V/(I + k0·3I0) for ground faults, or the phase loop (Va−Vb)/(Ia−Ib) for phase faults. The apparent impedance is projected onto the line angle and divided by the positive-sequence ohms per mile. Reference cases assume the modelled 24-mile, 69 kV line described in the settings panel.

Question 5

Are the reference waveforms real captures?

Accepted Answer

They are simulated, not field records — but they are not drawn by hand either. Each case is solved through the symmetrical component networks of the modelled line, so fault current, voltage depression, residual current and DC offset are all physically consistent. That is what makes them useful for training and for sanity-checking your own analysis.

Question 6

Can you build something like this for our team?

Accepted Answer

Yes — this tool came out of a client project and is the kind of purpose-built engineering software we do. If you have a workflow that off-the-shelf software handles badly, submit a service request and we will scope it.

SEL Event Analyzer

Single Line-to-Ground (A-G)

Why we built it

Fault type distribution

Questions