Cable short circuit trips offline Nipomo battery storage facility in California

What happened

A cable short-circuited at the Caballero battery energy storage system (BESS) facility in Nipomo, California, shortly after 11 a.m. on a Monday morning, triggering an automatic safety shutdown that took the facility offline. Firefighters, including CAL FIRE, responded in full to the site off Joshua Street. On arrival, crews confirmed there was no fire and no emergency, and cleared the scene shortly afterwards. A spokesperson for the facility said the automatic trip was a safety feature built into the design that shuts off power when a fault is detected, and that employees determined the short circuit did not pose a safety risk to the facility's operations or to the public.

Contributing factors

A cable short circuit was identified as the trigger for the automatic protective shutdown. No further technical detail on the cause of the short circuit was reported.

Lessons learned

1. A cable short circuit at a BESS site triggers automatic protective shutdown, so operators should verify that fault detection systems isolate power before faults spread.
2. Fire services attend full responses to BESS electrical faults even when no fire occurs, so sites should brief responders on automatic trip functions in advance.
3. Clear statements from operators after an automatic trip help confirm no public risk, so communication plans should cover fault events.

More lessons on detection and monitoring, fire suppression and firefighting, emergency response and public communication, from every incident on the register.

Not yet known

• Cause of the cable short circuit
• BESS equipment model and age
• Duration of the facility outage
• Cost of repairs

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

Source

ksby.com