2005 Java–Bali blackout
The 2005 Java–Bali Blackout was a power outage across Java and Bali on 18 August 2005, affecting some 100 million people.
Impact
Power went off at around 10:23 am on 18 August 2005 across most areas of the two islands. Jakarta lost power completely, along with Banten and Special Region of Yogyakarta; there were blackouts in parts of Central Java, along with parts of both West Java and East Java. Power resumed in most areas of Jakarta at about 5:00 pm on the same day.Cause
Prior to the blackout, the Jakarta area was importing about 21% of its power needs.A transmission line between Cilegon and Saguling, both in West Java, failed at 10:23 am local time. The devices protecting the system misoperated, sending incorrect signals to Suralaya Power Station. This led to a cascading failure that shut down two units of the Paiton Power Station in East Java and six units at Suralaya in West Java.
PT. PLN, the state-owned electricity company, confirmed that the electricity grid failed at several points throughout Java and the neighbouring island of Bali, causing a supply shortfall of 2,700 MW, roughly half of the original supply.