Transformer fire at AEP substation in St Joseph County, Indiana
Apr 2018Published 15 Sept 2026Responsible editor: Chief Editor
- Where
- AEP substation in Liberty Township, St Joseph County, Indiana
- Operator
- American Electric Power (AEP)
- What
- Transformer fire after it tripped
- Injuries
- None reported
- Outcome
- Transformer damaged, rest of substation unaffected, no customer outages
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Companies named in the reporting of this entry (being named is not a finding of fault): American Electric Power, Liberty
What happened
A fire broke out at an American Electric Power (AEP) substation in Liberty Township, St Joseph County, Indiana, after a transformer tripped. The fire started in the early afternoon but crews could not approach immediately due to safety concerns, so AEP allowed the isolated transformer to burn while it prepared to de-energise it. Once power to the transformer was cut, fire crews were able to enter the site that evening and bring the fire under control.
A section of the adjacent road was closed to traffic during the incident. Aside from the damaged transformer, the rest of the substation was unaffected. No injuries were reported, and Indiana Michigan Power stated that no customers lost power as a result of the fire.
Contributing factors
The fire was caused by a transformer that tripped; the isolated nature of the fault allowed the utility to let it burn safely before extinguishing it once de-energised.
Lessons learned
- Isolating a faulted transformer and allowing controlled burn-out can be safer than immediate firefighting when live electrical equipment is involved.
- Coordination between utility crews and fire services to de-energise equipment before intervention protects responders.
- Substation design that contains fire to a single unit can prevent wider equipment damage.
More lessons on fire suppression and firefighting, design, standards and commissioning, from every incident on the register.
Not yet known
- Exact cause of the transformer trip
- Transformer model and age
- Duration of the outage
- Cost of the damage
This entry is updated when these are reported. Get an alert for the next one like it.
Source
Published 2026-09-15. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.
