The power cut occurred at around 10pm on Sunday evening due to faulty circuit breaker at Vattenfall’s transformer station in Danderyd in northern Stockholm. A simultaneous fault occurred at Vattenfall’s facility in Överby in Sollentuna.
Shortly after a fire broke out at a further transformer station in Ensta in Täby as the problems quickly spread through Vattenfall’s grid. A fire also broke out at the Danderyd facility were the first problems occurred.
While most customers regained access to electricity at around 2am on Monday morning the underlying cause of the problems remained unclear.
“The underlying problem and the nature of the connection between the faults is still to be examined.” explained Maria Lidzell at Vattanfall.
The problems caused widespread power cuts in northern Stockholm with up to 100,000 customers of Vattenfall, Eon and Fortum losing power.
Furthermore around 20 trains on the route between Stockholm and Uppsala were cancelled on Sunday evening. Commuter and metro services were also affected by the power cut during the night.
Services are expected to return to normal by Monday morning, according to Henrik Berger at the Swedish Rail Administration (Banverket).
Maria Lidzell confirms that customers have the right to seek compensation if the power cut lasted for longer than 12 hours.