Chinchwad 220 kV Substation Fire: 3.1 Lakh Consumers, Pune Metro and 1,500 Industries Lose Power After CT and Breaker Explosion

The Chinchwad facility is an Extra High Voltage (EHV) substation that MSETCL (Mahapareshan in Marathi) operates at 220 kV (kilovolts). It is one of the main points where the state transmission network hands the supply over to the Maharashtra State Electricity Distribution Company Limited (MSEDCL, or Mahavitaran) for Pimpri-Chinchwad. Several 22 kV feeders that MSEDCL distributes in the city leave from it, and the 132 kV lines to Rahatani and Ganeshkhind are connected to it, according to the reports in The Free Press Journal and The Indian Express.

At around 12.25 pm, a 22 kV current transformer and breaker at the substation exploded, and a fire followed. People in Chinchwad heard a loud blast, and thick yellow and black smoke rose over the area, which caused panic in the crowded neighbourhood around the substation, as Mid-Day and Pune Mirror reported. Fire tenders reached the site, and the flames were under control soon after. Loksatta reported that the fire caused major damage to the equipment in the affected section.

A current transformer measures the current flowing through a line and passes a scaled-down reading to the meters and the protection relays. The breaker is the switch that the relays trip when a fault appears on that line. Both sit on every feeder that leaves a substation. Officials have described the cause only as a technical fault so far. The exact cause of the explosion and the extent of the damage are yet to be determined.

MSETCL isolated the damaged section and worked to bring the unaffected sections of the substation back into service. MSEDCL, in turn, used alternative supply routes to bring power back to its consumers in phases.

The fault cut the 22 kV feeders supplying MSEDCL, and its impact then spread through the 132 kV network. Below are the areas that the reports name, with the consumer numbers that MSEDCL officials gave:

• Pimpri-Chinchwad and Bhosari (around 2.6 lakh consumers): Pradhikaran, Ravet, Kalewadi, Wakad, Pimple Gurav, Pimple Nilakh, Sangvi, Punawale and Tathawade, among other areas.
• Pune city (around 50,000 consumers): Shivajinagar, Aundh, Ganeshkhind, Senapati Bapat Road, Shivajinagar Gaothan, Model Colony and Balgandharva, through the Rahatani and Ganeshkhind 132 kV lines.
• Chakan and Talegaon: The 132 kV substations at Ambethan in Chakan and at Talegaon, with about 1,500 industrial units at Ambethan.
• Pune Metro: The Pimpri-Chinchwad Municipal Corporation (PCMC) to Swargate line, which gets its supply from the Ganeshkhind substation.

Please note that the reports do not break the 2.6 lakh figure down between homes, shops and factories. Bhosari and Chinchwad both have large industrial areas, so the figure includes industrial consumers as well.

The fire was controlled quickly. The outage lasted longer, because the damaged section had to be isolated first and the load then moved to other routes. Early reports on Sunday afternoon said that the supply had been cut off until further notice; by 3 pm, most areas had it back. Below is the restoration timeline as reported on Sunday:

• 12.25 pm: The explosion and fire at the Chinchwad substation. Supply to the 22 kV feeders and the connected 132 kV lines was interrupted.
• Within 25 minutes: The Pune Metro got an alternate supply, and the services on the PCMC to Swargate line resumed, as The Indian Express reported.
• 1.50 pm: Supply to Shivajinagar, Aundh, Ganeshkhind and the nearby areas of Pune city was restored, after about an hour and a half.
• Around 3 pm: Most of the affected areas in Pimpri-Chinchwad got their supply back through alternative routes.
• 4.20 pm: The Ambethan substation was restored, ending a four-hour outage for the Chakan industrial belt.
• Talegaon: Domestic consumers got their supply through an alternative line from Khopoli. Industrial consumers faced restrictions for some time due to technical limitations. The Free Press Journal later reported that supply had been fully restored to all consumers dependent on the Talegaon substation.
• Sunday night: Around 1.25 lakh consumers in Nigdi, Yamunanagar, Bijlinagar, Ravet, Mamurdi, Dehu Road, Chinchwad, Tathawade and Wakad were still waiting for restoration, as per The Free Press Journal and The Indian Express. Repair work at the Chinchwad substation was continuing.

The industrial side of the outage was concentrated in Chakan and Talegaon. About 1,500 industries at Ambethan were without power from 12.25 pm to 4.20 pm. At Talegaon, the alternative line from Khopoli served the domestic load first, and the industrial supply followed later. In Pimpri-Chinchwad itself, Bhosari and Chinchwad were among the affected areas, and the alternative routes carried most of the load back by 3 pm.

It is worth noting that the incident took place on a Sunday, when many plants are on their weekly off. Plants that run through the weekend, such as continuous-process units, foundries and cold storages, do not get that relief. For them, a four-hour break followed by a sudden return of supply is a real event, and how the plant rides through it and restarts depends on arrangements made well before the fault.

A single 22 kV current transformer and breaker failure inside a 220 kV substation was enough to cut power to about 3.1 lakh consumers, the Pune Metro and about 1,500 industries on Sunday afternoon. Nobody was hurt, the fire was controlled quickly, and MSEDCL had most of the load back within three hours through alternative routes. The cause is still open. Officials have called it a technical fault, and what failed inside the CT and breaker is yet to be reported.

The substation itself is MSETCL's asset, and its inspection is the utility's job. Nothing inside a plant caused Sunday's outage, and nothing inside a plant could have prevented it. Please note that the same class of equipment sits inside every plant that takes supply at HT (high tension). The metering cubicle and the HT panel in such a plant, at 11 kV, 22 kV or 33 kV, carry their own current transformers, breakers and protection relays, only smaller. The difference is the scale. When a CT fails at a transmission substation, a region loses power for a few hours. When it fails inside a factory, the plant loses power, the panel room can catch fire, and the person standing at the panel can be injured.

In most cases, such a failure gives warning signs first. Below are the ones that usually come before it:

• A hot termination on the HT panel, visible on a thermal image under load
• A low insulation resistance reading on the cables or the panel
• A breaker whose last service record is years old
• A relay setting that nobody has checked since commissioning

None of these shows up from outside a closed panel. They show up when the panel is opened and the readings are taken, which is what an electrical safety audit does. At PowerTech, the audit team includes a Chartered Electrical Safety Engineer authorised by the Government of Maharashtra under Regulation 6 of the Central Electricity Authority (Measures relating to Safety and Electric Supply) Regulations, 2023. The audit we conduct at a plant inspects the HT panel, the breakers and the protection relays, measures the insulation resistance with calibrated instruments and scans the panels under load through a thermography audit. The fire safety audit we conduct reviews the plant's own substation room for fire risk as well, because Sunday showed where an electrical fault can end.

As such, the right question after Sunday is not about the substation but about the HT panel inside your own plant. When was it last opened, measured and tested? If nobody can answer that with a date, it is the right time to book the audit.

• Pune Mirror, 6 September 2026, 1.31 pm: https://punemirror.com/city/pune/pimpri-chinchwad/blast-at-pimpri-chinchwad-substation-sparks-major-fire-power-supply-cut-off-indefinitely/
• Mid-Day (Archana Dahiwal), 6 September 2026, 2.51 pm: https://www.mid-day.com/news/india-news/article/fire-breaks-out-at-msetcl-chinchwad-substation-power-supply-hit-across-pimpri-chinchwad-23648630
• Punekar News, 6 September 2026, 3.27 pm: https://www.punekarnews.in/pune-pimpri-chinchwad-power-outage-after-fire-at-chinchwad-220-kv-substation/
• The Indian Express (Sushant Kulkarni), 6 September 2026, published 4.58 pm, updated 10.05 pm: https://indianexpress.com/article/cities/pune/pimpri-chinchwad-power-cut-after-substation-blast-fire-brought-under-control-10865755/
• Loksatta (Marathi), 6 September 2026, 6.05 pm: https://www.loksatta.com/pune/chinchwad-substation-explosion-power-outage-pune-metro-service-disrupted-pune-print-news-rak-94-6121078/
• PTI via ThePrint, 6 September 2026, 6.48 pm: https://theprint.in/india/fire-at-msetcl-substation-disrupts-power-supply-in-pimpri-chinchwad/3035234/
• The Free Press Journal (Varad Bhatkhande), 6 September 2026, updated 8.59 pm: https://www.freepressjournal.in/pune/msetcl-substation-fire-disrupts-power-supply-to-31-lakh-consumers-in-pune-pimpri-chinchwad