The cause has been linked to a damaged overhead wire along the railway in Töreboda, central Sweden, Swedish Radio News reports.
The disruptions hit traffic throughout the day as Sweden's national rail operator SJ diverted train traffic and replaced some with buses.
"We are out and working and trying to resolve the problem as quickly as possible. But nevertheless, the delays will continue," Mona Huovinen at the Swedish Transport Administration press office told Swedish Radio News.
Major disruptions and delays have hit along the entire western rail line, especially between the towns of Hallsberg and Falköping. Regional and intercity trains were replaced by buses on the routes from Hallsberg to Skövde and Skövde to Laxå.