Explosion and fire at Chinchwad Extra High Voltage Substation, Pune disrupts power
Sept 2026Published 8 Sept 2026Responsible editor: Chief Editor
- Where
- Chinchwad Extra High Voltage Substation, Pune, Maharashtra
- Operator
- Maharashtra State Electricity Transmission
- What
- Explosion and fire in medium voltage current transformer and breaker unit
- Injuries
- None reported
- Cause
- Technical fault not further detailed
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Companies named in the reporting of this entry (being named is not a finding of fault): Maharashtra State Electricity Transmission
What happened
A technical fault led to an explosion in a medium voltage current transformer and breaker unit at the Chinchwad Extra High Voltage Substation in Chinchwad, Pimpri-Chinchwad, Pune, Maharashtra, operated by Maharashtra State Electricity Transmission, triggering a fire around midday during normal operation. The fire was brought under control by firefighters shortly after ignition. The fault disrupted supply on multiple high voltage feeders connected to the site, cutting power to roughly 310,000 consumers across the metropolitan area.
Two connected 132 kV substations were also affected, and about 1,500 industrial consumers in one of those areas reportedly lost supply. A metro rail system briefly lost its supply from a nearby substation as a knock on effect. Grid operators isolated the damaged bay and restored most consumers within a few hours using alternative feeders and routes, although around 125,000 consumers faced longer delays because of load constraints on the remaining network. No injuries or casualties were reported.
Contributing factors
A technical fault in a current transformer and breaker unit at the Chinchwad Extra High Voltage Substation. The cause was not further detailed in available reporting.
Lessons learned
- A fault in a medium voltage current transformer and breaker unit at a substation can cut supply to 310,000 consumers, so operators should verify backup feeder capacity and load limits on alternative routes.
- Isolation of a single damaged bay after a current transformer failure allowed most supply to be restored within hours via alternative routes, so substations should maintain diverse interconnections.
- Industrial consumers may face longer delays after a substation fault because of load constraints on remaining network, so contingency plans must address this asymmetry.
More lessons on electrical protection and isolation, from every incident on the register.
Not yet known
- Exact cause of the technical fault
- Model and age of the current transformer
- Cost of damage and repairs
- Duration of full supply restoration
This entry is updated when these are reported. Get an alert for the next one like it.
Source
Published 2026-09-08. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.
