The Jakarta Post
State electricity firm PLN released a statement on Sunday announcing that the Java-Bali power system was expected to return to normal by about 9:27 p.m. that day, or five hours after the firm had started to repair a problem that caused major blackouts in the Greater Jakarta area and parts of West and Central Java.
The Java-Bali power system provides electricity to West Java, Jakarta, East Java and Central Java.
PLN's acting president director Sripeni Inten Cahyani said in a press conference that the Jakarta region would be powered up by 7:27 p.m.
“Hopefully things will return to normal before midnight,” she said.
As of 6 p.m., PLN estimated that almost 50 percent of the affected areas in West Java and Jakarta had been gradually powered up, according to a PLN strategic procurement director, Djoko Abumanan.
PLN officials said that there was “a problem in the transmission that stretches from east and west”.
“Due to the problem in the transmission, the West Region, which has a higher base load than the East Region, got blacked out because the West Region has less power capacity than the East,” Djoko of PLN said.
A full investigation into the details of the incident would require about three months, said Sripeni.
The last major blackout in West Java and Jakarta occurred 22 years ago in 1997. In 2018, a partial blackout also hit the areas, according to PLN.