Transformer explosion and fire at Duke Energy substation in Maineville, Ohio
July 2024Published 1 May 2026Responsible editor: Chief Editor
- Where
- Duke Energy substation, 8600 block Butterworth Road, Maineville, Ohio
- Operator
- Duke Energy
- What
- Transformer explosion and fire
- Injuries
- None reported
- Cause
- Equipment failure
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Companies named in the reporting of this entry (being named is not a finding of fault): Duke Energy
What happened
In July 2024, an explosion and fire occurred at a Duke Energy transformer substation on the 8600 block of Butterworth Road in Maineville, Warren County, Ohio, United States. Multiple fire crews attended. The responding fire service reported that the substation stood several hundred feet from the nearest houses, that a piece of equipment had exploded, that the fire was still burning on arrival and that equipment within the site remained energised. Duke Energy publicly attributed the fire to an equipment failure and stated that no customers lost supply. No injuries were reported. The consequences were limited to loss of the affected asset and the fire service response.
Contributing factors
Duke Energy publicly attributed the event to equipment failure. No further cause was published in the source at the time of reporting, and no investigation findings were available. The source also noted, through the fire service, that the separation between the substation and the nearest housing limited the exposure of third parties, and that supply was maintained to customers, which is consistent with protection operating to isolate the affected plant. Nothing further about the failure mechanism can be stated from the available reporting.
Lessons learned
- Substation separation from housing limited third party exposure, so operators should record and maintain buffer distances in fire safety cases.
- Equipment remained energised on fire service arrival, so pre-agreed isolation points and standoff distances must be shared with responders.
- Protection isolated the fault and supply continued, so operators should log such events to guide redundancy investment.
More lessons on spacing, layout and fire spread, fire suppression and firefighting, electrical protection and isolation, from every incident on the register.
Not yet known
- Exact failure mechanism
- Transformer model and age
- Duration of fire service response
- Cost of asset loss
This entry is updated when these are reported. Get an alert for the next one like it.
Source
Other entries that name Duke
Published 2026-05-01. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.
