East Thistle — O&M Monitoring

42Hz AI Insights

312 streams · 30-day cohort · OEM bulletins indexed · refreshed 2 min ago

Health forecast — T2

58 → 42

Expected health drop over next 14 days if no intervention

Failure-mode probability

OLTC arc · 64%

Top hypothesis from 412 historical cohort matches

Cost of inaction

$2.4M – $6.1M

Catastrophic failure replacement + 18-day MERIDIAN-04 SLA hit

Switching plan confidence

99.4%

Load shift T2 → T1+T3, both <70% capacity headroom

in chat

PREDICTIVE · 99.4% confidence

T2 — Internal high-energy arcing imminent within 6–18 hr without intervention

Duval Triangle has crossed D1 → D2. Acetylene rose 5.7× in 6h during a 14 MW load step on Feeder 52F23. Cohort match against 412 historical transformer events places T2 in the top 4% of pre-failure signatures.

WINDOW

6–18 h

MODE

OLTC arc

COST

$2.4–6.1M

↳ Trained on 412 cohort events · OEM service bulletins APG-2310 · last 30d telemetry

TREND · Thermal anomaly

T2 winding hot-spot running 4.1°C warmer than peer transformers at same load

Compared against the 30-day cohort of T1 + T3 at similar ambient and load, T2 is consistently warmer. Most likely contributor: degraded oil flow through radiator bank R-3.

Δ vs cohort

+4.1°C

RATE

+0.18°C/h

ZONE

Rad R-3

↳ Cohort: T1 + T3 last 30d · seasonal-adjusted

PROCUREMENT · Lead-time risk

72 kV bushing inventory at zero — order today to land before Q3 outage

ABG lead time is 30 weeks. Outage planning calls for one bushing replacement on T1 in early Q4. Ordering after May 2 risks slipping the planned outage window.

STOCK

0 / 1 min

LEAD

30 wks

ORDER BY

May 2

↳ ABB lead-time API · 2026 outage plan

OPTIMIZATION · Load balancing

Shifting 14 MW from 52F23 to 52F24 reduces T2 thermal stress 38%

Both T1 and T3 are running below 70% of nameplate. Reallocating MERIDIAN-04 demand across feeders rebalances thermal load and buys 6–8 hr of inspection window before any planned outage.

RELIEF

−38%

T1 HEADROOM

32→24%

T3 HEADROOM

31→25%

↳ Power-flow solver · MERIDIAN-04 SLA constraints

42Hz · About this insight

T2 — Internal high-energy arcing imminent within 6–18 hr without intervention

T2 OLTC arc · D2 zone · 6h acetylene rise. I have the 30-day cohort + OEM bulletins indexed. What do you want to dig into?

↳ scoped to active insight · 30d cohort · OEM bulletins indexed