DGA evidence
IEEE C57.104
Institute of Electrical and Electronics Engineers
Guidance for interpreting dissolved gases in mineral-oil-immersed transformers.
DGA evidence
IEEE C57.104 for DGA Evidence in Transformer APM
How transformer teams can treat IEEE C57.104 as a dissolved gas analysis reference when preparing traceable, human-reviewed GridAPM pilot evidence.
Context, not certification
GridAPM cites IEEE Standards Association - IEEE C57.104 for public context. This page does not reproduce copyrighted standard text and does not claim certification, conformance, or endorsement.
What it covers
Use standards context to improve evidence quality.
Dissolved gas analysis is one of the most common evidence streams used to review power transformer condition. A pilot workbench should preserve gas values, units, sampling dates, lab context, trend movement, and reviewer notes instead of flattening DGA into a single unexplained score.
- DGA and oil quality records with source files, dates, units, and laboratory context.
- Trend views that separate measured values, calculated ratios, and reviewer interpretation.
- Evidence gaps such as missing sampling intervals, inconsistent units, or unclear asset identity.
- Human-reviewed rationale that links draft recommendations back to approved source material.
How GridAPM references it
Where this reference fits in the workbench.
GridAPM can help a utility pilot organize DGA evidence, surface missing context, draft review questions, and prepare evidence-pack language for engineer approval. The public site does not claim that GridAPM replaces the standard, diagnoses transformer condition, or issues final DGA conclusions.
- Intake
- Correlate & quality gate
- Agent reasoning
- Engineer sign-off
- Work package & report
Related evidence
What this evidence stream looks like.
- H2
- CH4
- C2H4
- C2H2
H2 watch level Gassing event
What it does not mean
Boundaries we keep in writing.
- No public claim of IEEE certification or formal standards conformance is made.
- DGA interpretation remains subject to qualified engineering review and the utility's procedures.
- GridAPM draft output should be treated as review material until approved by responsible personnel.
Next steps
Connect the reference to a pilot workflow.
Transformer evidence readiness checker
Check whether your DGA and oil-quality records are ready for CBM review.
DGA generation rate analysis
Why gas generation rates matter more than single readings in review.
Sample evidence pack
See how DGA trends, rationale, and sign-off appear in a real deliverable.
Pilot evaluation
The eight-week pilot structure: scope, evidence inputs, and deliverables.
FAQ
Standards language stays careful.
Does GridAPM implement IEEE C57.104 as a deterministic diagnostic engine?
The public website should not claim that. GridAPM can use DGA fields as pilot evidence and keep outputs reviewable by transformer engineers.
Can DGA evidence alone approve maintenance?
No. DGA should be reviewed with asset context, operating history, inspection findings, other tests, and qualified engineering judgment.
Test the workflow on your own fleet.
An eight-week pilot runs on your approved evidence, with your engineers keeping sign-off authority at every step.