On Saturday, Nyköping's laser was hit by a power outage and the reserve power at the hospital did not start. According to Hans Nilsson, operations technician and unit manager for real estate services Västra, this is nothing strange.

"You often misunderstand this with reserve power and think it solves all problems, but you always have to fix the fault yourself," he says.

He is similar to the power cut in that there is an error in a refrigerator and a plug goes off.

- Just because the energy company has backup power does not mean that the refrigerator works, you have to fix the fault first. Then you can change the fuse and get the power back, he says.

Hans Nilsson believes that the reason the backup power did not start was because it is high voltage connected.

- Our high voltage plant was completely intact and then the reserve power should not start. We must not start a backup force against a fault.

A short circuit occurred

The incident should have occurred in connection with a planned maintenance work with the hospital's electrical system. According to his Nilsson, a damage to a circuit breaker occurred in the low voltage switchgear, which created a short circuit.

- The monitoring system, so-called "arc guards", sensed that an arc entered the switchgear and shut down the entire switchgear. Because of this, the injuries were very limited, says Hans Nilsson.

- There was a damage to the circuit breaker itself which caused it to take a while before we could dismantle it.

According to Hans Nilsson, the entire low voltage switchgear is as intact as it was before the power cut.