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CRITICALALM-2026-0412-001· 22m ago
C₂H₂ rise on T2 — possible arcing in oil
Acetylene climbed from 0.4 ppm → 2.3 ppm over last 14 days. Duval Triangle zone shifted D1 → D2 (high-energy arcing).
Pre-event context · 15 minT2.dga.c2h2
Source · INSIDEVIEW 6.0 · Duval Triangle
Runbook
Acetylene rise · suspected arcing
C₂H₂ is the single strongest indicator of arcing in oil. Treat any rise above LDL as a priority investigation.
- Verify Duval Triangle zone shift from D1 → D2 via INSIDEVIEW 6.0.
- Cross-check with CO / CO₂ ratio to rule out cellulose involvement.
- Pull a lab sample within 24 hrs (Myrkos 2 if portable unit is on-site).
- Escalate to lead PE and schedule offline electrical testing in next planned outage.
- Notify customer engineering (read-only dashboard) via APG monitoring center.
Escalate · Tim Sabat (APG) → Yonan G. (O&M) → Doble: Nicholas Chiccarelli
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