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Furnace Transformer DGA Tool

IEEE C57.104 dissolved-gas screening with key-gas fault pattern for a furnace-duty transformer.

Arc-furnace duty stresses oil like nothing else โ€” gas generation rates run far above utility norms, so trends and rate-of-change matter more than absolute Condition tables. Screen here, but baseline against this unit's own history.

Condition 1 โ€” normal
Screening verdict
No dominant fault signature
Key-gas pattern
Hโ‚‚ (hydrogen)50 ppm (C1 limit 100)
CHโ‚„ (methane)40 ppm (C1 limit 120)
Cโ‚‚Hโ‚† (ethane)30 ppm (C1 limit 65)
Cโ‚‚Hโ‚„ (ethylene)40 ppm (C1 limit 50)
Cโ‚‚Hโ‚‚ (acetylene)1 ppm (C1 limit 1)
CO (carbon monoxide)300 ppm (C1 limit 350)

IEEE C57.104 Condition-1 screening with key-gas pattern matching for this furnace-duty transformer. Any acetylene above ~1 ppm deserves attention โ€” it only forms in arcs. Trends beat absolutes: resample in 30 days; doubling gas is an active fault regardless of level.

Sources: IEEE C57.104 โ€” DGA interpretation; key-gas & Rogers methods; Duval triangle (lab confirmation recommended)

Planning estimate only โ€” interconnection, protection settings and compliance must be reviewed and signed off by a licensed electrical engineer and your utility before energisation.

Use the free Furnace Transformer DGA Tool online โ€” IEEE C57.104 dissolved-gas screening with key-gas fault pattern for a furnace-duty transformer. Runs instantly in your browser: no signup, no upload, mobile-friendly.

About Furnace Transformer DGA Tool

Arc-furnace duty stresses oil like nothing else โ€” gas generation rates run far above utility norms, so trends and rate-of-change matter more than absolute Condition tables. Screen here, but baseline against this unit's own history.

How to use Furnace Transformer DGA Tool

  1. 1Paste the six gas concentrations from the DGA lab report.
  2. 2Read the condition verdict and the key-gas fault pattern.
  3. 3Resample per the guidance โ€” doubling gas is an active fault.

Why use Furnace Transformer DGA Tool?

  • โœ“IEEE C57.104 Condition-1 limits with automatic verdicts
  • โœ“Key-gas pattern matching names the likely fault type
  • โœ“Acetylene alarm logic โ€” the gas that only means trouble
  • โœ“Trend guidance: rate-of-change beats absolute levels

Frequently asked questions

What does dissolved gas analysis tell you about a transformer?+

Oil dissolves the gases faults generate, each fault type with a signature: hydrogen from partial discharge, ethylene from hot metal, acetylene only from arcing, CO from cooking paper. A โ‚น5,000 oil test reads the transformer's internal health without opening it โ€” the cheapest diagnostics in the substation.

Which DGA result demands immediate action?+

Acetylene above ~1โ€“2 ppm, or any gas doubling between samples. Acetylene forms only above ~700ยฐC โ€” essentially arcing โ€” and an active arc escalates on its own schedule, not yours. The screening verdict here flags it red; respond with resampling, loading review and expert analysis.

How often should transformer oil be tested?+

Annually for distribution and healthy power transformers; quarterly to monthly once any gas trends upward; immediately after through-faults, alarms or relay operations. The trend is the diagnosis โ€” single samples only screen, which is exactly what this tool does.

Can this screening replace lab Duval-triangle analysis?+

No โ€” it's the first read, applying C57.104 limits and key-gas heuristics to flag what deserves expert attention. Duval triangles, ratio methods and gassing-rate analysis on accredited lab data make the formal diagnosis. Screen here, escalate with confidence.

Embed Furnace Transformer DGA Tool on your website

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