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Grid infrastructureGreeceEIR-0188

Transformer explosions and fire cut power to Arta villages, Greece

Aug 2026Published 7 Sept 2026Responsible editor: Chief Editor

SignificantElectrical
Estimated damageEstimated by the register's adjusterHow? Know the real figure?
Figure hidden: shown to subscribersMedium confidence
supply cut for about •• daysShown in the record →Full estimate
From the recordRoot cause hiddenFailed part hidden
Where
Grammenitsa Extra High Voltage Center, Arta region, western Greece
Operator
PPC
What
Successive explosions in a transformer triggered fires
Response
Fire crews worked around downed live power cables
Outcome
Power fully restored by mid-morning

What happened

Several villages in the Arta region of western Greece lost electricity for several hours after powerful successive explosions occurred in a transformer at the Grammenitsa Extra High Voltage Center, operated by power utility PPC. The explosions, which happened shortly before midnight, triggered two small fires within the substation. The fire then spread to nearby grassland and forested areas. Fire crews attending the scene had to work around downed live power cables, which created a risk of electrocution during firefighting operations.

Settlements in the mountainous part of the prefecture and in the Kambos area were affected by the outage. Power was fully restored to all affected villages by mid-morning, according to state broadcaster ERT.

Contributing factors

Transformer explosions at the extra-high-voltage substation caused fire to break out and spread to adjacent grassland and forest; downed live cables complicated the firefighting response. The underlying cause of the transformer explosions was not reported.

Lessons learned

  1. Transformer explosions at extra-high-voltage substations can ignite nearby vegetation, so operators should maintain firebreaks and clear vegetation around the site.
  2. Downed live cables at a substation fire create an electrocution risk for fire crews, so utilities must enable rapid de-energisation protocols.
  3. Network redundancy and clear restoration plans limit outage length for villages after a substation failure.

More lessons on maintenance, inspection and ageing assets, worker safety and safe systems of work, outages, backup supply and restoration, from every incident on the register.

Not yet known

  • Cause of the transformer explosions
  • Transformer model and age
  • Cost of damage and repairs

This entry is updated when these are reported. Get an alert for the next one like it.

Source

ekathimerini.com

Published 2026-09-07. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.

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Chart to reuse with this story: Grid infrastructure incidents by year, free with a credit (PNG).

Grid infrastructure incidents in Greece: 3 entries, with a free alert for the next one.

Substation and transformer fires: the counts, the latest entries and a free alert for the next one. Also: transformer explosions and power line and cable failures.

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