Power was cut to some corporations in the Daedeok Industrial Complex in Daejeon, causing damage to tenant corporations including the Hankook Tire Daejeon plant. A voltage drop occurred during electrical work at the intake station under the jurisdiction of Korea Water Resources Corporation (K-water), reportedly affecting some facilities using the same line.
According to the energy industry on the 8th, power supply was cut to parts of the Daedeok Industrial Complex in Daedeok-gu, Daejeon, at about 2:30 p.m. At the Hankook Tire Daejeon plant, the outage continued for more than two hours as of 4:30 p.m. As a result, on-site plant equipment operations were temporarily suspended.
Hankook Tire is reportedly supplying power to the main building by operating an emergency generator. Although an emergency generator supplies temporary power to office buildings or essential equipment during an outage, it has limits in fully operating all plant production facilities at normal levels.
At other corporations such as the Hansol Paper Daejeon plant and Hanon Systems nearby, power was also cut or went out and was then restored. Daedeok-gu, Daejeon, believes the outage did not occur across the entire Daedeok Industrial Complex and is proceeding with restoration measures.
The outage is reportedly related to electrical work underway at the Hyeondo Intake Station in Cheongju, North Chungcheong. The Hyeondo Intake Station is a facility that draws and supplies water, and during work that day, a problem occurred in the Korea Electric Power Corporation customer's equipment, triggering a circuit breaker. A circuit breaker cuts current when an electrical equipment fault occurs, preventing equipment damage or further accidents.
Korea Electric Power Corporation is investigating the cause of the incident, viewing it as a power cut caused by a voltage drop after transmission and substation facilities stopped. A voltage drop is a phenomenon in which the power system voltage falls below normal levels, which can cause equipment to stop or protective devices to activate.