Power Outage in Sumatra Affects Multiple Regions, INALUM Smelter Operations Unaffected

Published: May 25, 2026 09:55

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[SMM Aluminum Express News] A power disruption in Sumatra linked to a suspected weather-related fault on the 275 kV Muara Bungo–Sungai Rumbai transmission system triggered a cascading outage affecting multiple regions. Authorities have restored 3,431 MW of load and all 176 affected substations. It was confirmed that INALUM aluminum smelter operations in Sumatra were not impacted and continue to operate normally.

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