Breaker explosion and fire at Mylapore substation in Chennai injures two engineers

What happened

A circuit breaker at Mylapore substation, a 230kV power substation operated by TNPDCL in Mylapore, Chennai, Tamil Nadu, India, exploded during evening operating hours, triggering a fire. Two utility engineers working at the site suffered minor burns and were taken to hospital for treatment. The explosion and resulting fire caused a power outage affecting several surrounding neighbourhoods, with supply to eight downstream substations interrupted. A customer helpline that was itself powered from the affected substation also went offline, preventing residents from reporting the outage.

Fire crews attended the site to extinguish the blaze while a separate rectification team worked to restore power. Utility officials stated that the situation was brought under control and that supply would be progressively restored to affected areas.

Contributing factors

Not reported in detail beyond the breaker explosion itself; no root cause for the equipment failure was disclosed.

Lessons learned

1. Backup or redundant power arrangements for customer service infrastructure such as complaint helplines should not depend on the same substation they are meant to report faults for.
2. Personal protective equipment and safe working distances around high-voltage switchgear are essential given the risk of sudden breaker failure.
3. Rapid coordination between fire services and utility rectification teams can help limit outage duration following equipment fires at substations.

More lessons on outages, backup supply and restoration, spacing, layout and fire spread, fire suppression and firefighting, from every incident on the register.

Source

msn.com