This is SJ Rc2 1068, heading a train south towards Stockholm at around 130 km/h. It's photographed just south of Upplands Väsby, near Stockholm, on the four track mainline. It's probably come far, as Sovvagn = Sleeper.
The photo is taken in the beginning of December 1997 with a 90 mm Tele-Elmarit-M at full aperture, f/2.8, and "too long" exposure (1/125 or 1/250 s), but that's what you need around noon if it's winter, overcast and you're using ISO 400 film. The weather is perfect if you want lots of sparks from the pantograph.
Urban Fredriksson
http://www.canit.se/%7Egriffon/