Authorities have launched an investigation into a widespread power outage that impacted large portions of Sumatra, including Jambi, West Sumatra, Riau, North Sumatra, and Aceh. The blackout, which began on Friday, May 22, 2026, prompted a multi-agency response to determine the technical cause of the system failure.
The Directorate of Certain Crimes (Dittipidter) of the National Police, Bareskrim Polri, has deployed a team to the site of a broken Sutet 175-176 transmission connection in Tempino Village, Mestong, Muara Jambi. Investigators, working alongside the National Police’s Forensic Laboratory Center (Puslabfor) and PLN, have collected evidence from the scene for further analysis.
According to PT PLN Persero, the disruption originated from a transmission failure in the Jambi region. PLN President Director Darmawan Prasodjo stated that the incident was initially triggered by severe weather affecting the 275 KV transmission line between Muara Bungo and Sungai Rumbai. This initial fault caused the transmission line to disconnect from the broader Sumatran electrical grid.
The loss of load led to a cascading effect across the power system. Some areas experienced a sudden oversupply of electricity, causing a spike in frequency and voltage that forced power plants to automatically shut down. Conversely, other regions suffered from a power deficit, which caused frequency and voltage drops, further destabilizing the network and resulting in widespread outages.
Brigadier General Mohammad Irhamni of the Bareskrim Polri noted that, as of Sunday, May 24, 2026, there is no evidence to suggest that the damage to the conductor was caused by human intervention or intentional sabotage. The investigation is expected to continue as authorities process the collected evidence.
Frequently Asked Questions
What caused the power outage in Sumatra?
According to PLN, the blackout was triggered by weather conditions that damaged a 275 KV transmission line between Muara Bungo and Sungai Rumbai in Jambi, leading to a system-wide failure.
Is there any evidence of sabotage?
No. The Bareskrim Polri has stated that, based on preliminary findings, there is no indication of intentional human action behind the broken conductor.
Which regions were affected by the blackout?
The blackout impacted parts of Jambi, West Sumatra, Riau, North Sumatra, and Aceh beginning on the afternoon of Friday, May 22, 2026.
How might the findings from the forensic investigation impact the future maintenance protocols for regional transmission lines?
