KSEB transformers catch fire under summer overload in Kerala
2024Published 28 Sept 2026Responsible editor: Chief Editor
- Where
- Thiruvananthapuram district, Kerala, India
- Operator
- Kerala State Electricity Board
- What
- Transformers caught fire or lost fuse from overload
- Cause
- Local demand exceeded rated capacity
- Outcome
- Six transformers lost in one district
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Companies named in the reporting of this entry (being named is not a finding of fault): Kerala State Electricity Board, KSEB
What happened
The New Indian Express reported that Kerala State Electricity Board (KSEB) distribution transformers were catching fire because they could not bear rising summer load. A senior KSEB officer said six transformers had been lost in Thiruvananthapuram district alone, and that the strain was severe in Malappuram, Kannur and Kasaragod, where capacity upgrades had been delayed by protests against new lines. The report appeared as the state recorded daily consumption of 110.10 million units and a peak of 5,506 MW.
The officer linked the pressure to air-conditioner growth and said fuses could melt or transformers catch fire once a local transformer was overloaded. Electric-vehicle charging in peak hours, and night-time grid draw by some rooftop solar customers, were also described as adding to peak demand. It is not reported which of the lost transformers caught fire, when each failure occurred, or whether anyone was injured.
Contributing factors
The officer attributed the failures to air-conditioner installations that can exceed local transformer capacity, delayed reinforcement where new lines had been opposed, and consumers not notifying KSEB when adding high-load equipment. Peak demand was also said to be extended by air-conditioner use, electric-vehicle charging and night-time draw after daytime rooftop solar export.
Lessons learned
- Distribution operators should track local load growth from air conditioning and other new appliances and reinforce transformers before ratings are breached.
- Daytime rooftop solar does not by itself relieve evening peaks if customers still draw heavily from the grid at night.
- Clear rules for notifying the network operator before adding high-load equipment, and peak-hour demand advice, can reduce overload failures.
More lessons on maintenance, inspection and ageing assets, outages, backup supply and restoration, emergency response and public communication, from every incident on the register.
Not yet known
- Transformer models and ages
- Total cost of damage and lost supply
- Duration of supply interruptions
This entry is updated when these are reported. Get an alert for the next one like it.
Source
Published 2026-09-28. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.
