The SJ Class Rm is an

electric locomotive An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or on-board energy storage such as a battery or a supercapacitor. Locomotives with on-board fuelled prime movers, such as diesel engines or gas ...

operated by

Swedish State Railways The Swedish State Railways ( sv, Statens Järnvägar) or SJ, originally the Royal Railway Board ( sv, Kungl. Järnvägsstyrelsen), was the former government agency responsible for operating the state-owned railways in Sweden. It was created i ...

( sv, Statens Järnvägar, SJ) and later

Green Cargo Green Cargo AB is a Swedish state-owned logistics company transporting various types of goods by train. It was created on 1 January 2001 out of the logistics division of Swedish State Railways (SJ) and became a government-owned limited co ...

. The six locomotives are variants of the

Rc locomotive The Rc class is the most used electric locomotive in Sweden. Rc is a universal locomotive used both in freight and passenger trains. The largest operator is Green Cargo, although SJ, Tågab, Hector Rail and the Swedish Transport Administration ...

and built by

ASEA ''Allmänna Svenska Elektriska Aktiebolaget'' (English translation: General Swedish Electrical Limited Company; Swedish abbreviation: ASEA) was a Swedish industrial company. History ASEA was founded in 1883 by Ludvig Fredholm in Västerås as ...

in 1977. The difference is smaller wheels giving higher pulling force, but lower maximum speed. They were used in triple-unit configuration on

Malmbanan The Iron Ore Line ( sv, Malmbanan) is a long railway line between Riksgränsen and Boden in Norrbotten County, Sweden, owned by Trafikverket (the Swedish Transport Administration). The line also contains two branches, from Kiruna to Svappavaara ...

as supplements to Dm3-units, but later moved to other parts of the Swedish rail network after the transport needs on Malmbanan were reduced. When originally used to haul iron ore they were ballasted, fitted with SA3 couplings and additional set of brakes, but all these modifications were removed when the locomotives were put in ordinary freight operation. In the 1990s they were repainted from orange to blue. When SJ was split up, they were transferred to Green Cargo, stationed in Malmö. In 2013–2014 they were used again for iron ore traffic on Malmbanan. They went between Svappavaara and Narvik for

Northland Resources Northland Resources S.A. also known as Northland is a publicly traded exploration and development mining company. It currently focuses on iron ore bearing properties located in the northern regions of Sweden and Finland. The company currently had ...

, using SA3 couplings. After the Northland bankruptcy they were parked but returned to service in 2016 (with standard couplings).The locomotives are now used by Green cargo and hauling various freight trains all around Sweden

External links

Järnväg.net on Rm
{{Swedish railway stock Electric locomotives of Sweden Rm Green Cargo locomotives ASEA locomotives Bo′Bo′ locomotives 15 kV AC locomotives Standard gauge locomotives of Sweden