SJ Dm3
Encyclopedia
Dm and Dm3 is a series of locomotive
s used by Statens Järnvägar
(SJ) and later Malmtafik i Kiruna
(MTAS) for pulling iron ore trains on Malmbanan
in Sweden and Ofotbanen in Norway. A total of 39 double-locomotives (Dm) were delivered between 1953 and 1971, built by ASEA. A further 19 center locomotives (Dm3) were later delivered. Norges Statsbaner of Norway also operated 12 similar locomotives, designated NSB El 12
. The Dm is a slower, freight-optimized version of the Da
-locomotive.
between Luleå
in Sweden and Narvik
in Norway had been using the Of for a long time, and Statens Järnvägar chose to order new locomotives for Malmbanan at the same time as they ordered the Da
-locomotives. At first 24 double locomotives were delivered in 1953, but in the 1960s SJ ordered additional 15 double sets. These were given more powerful engines, though the older five double sets were later rebuilt. These double locomotives could pull 3,400 tonne trains, but this was not sufficient during the end of the 1960s so SJ ordered 19 new center locomotives. These were mounted permanently between each of the Dm-locomotives, without its own drivers cabin, and designated Dm3. This allowed trains up to 5,400 tonnes. Instead of ordering Dm3s, NSB chose a different and more powerful locomotive, the NSB El 15
. From 1979 and a few years onward the cabins were modernised, with new instrumentation and less noise.
In the 1980s most of the double locomotive sets were moved other places on SJs network. In 1996 the operation of Malmbanan was transferred to MTAB, who also took over all the triple engines and some of the double engines. They were redesignated Dm2 (for double locomotives) and Dm3 for triple locomotives. From 2000 the new IORE
locomotives were delivered, and all the Dm2s and some of the Dm3s were taken out of service. In 2004 one set was donated to the heritage society Malmbanans Vänner, who also owns one El 12. MTAB has announced that they will take the Dm3 out of service by 2011 when enough IORE locomotives are available to relieve them.
Locomotive
A locomotive is a railway vehicle that provides the motive power for a train. The word originates from the Latin loco – "from a place", ablative of locus, "place" + Medieval Latin motivus, "causing motion", and is a shortened form of the term locomotive engine, first used in the early 19th...
s used by Statens Järnvägar
Statens Järnvägar
The Swedish State Railways or SJ, originally the Royal Railway Board , is a former government agency responsible for operating the state railways in Sweden....
(SJ) and later Malmtafik i Kiruna
Malmtrafik
Malmtrafik i Kiruna AB or MTAB is a Swedish railway company which operates the iron ore freight trains on the Ore Line and the Ofoten Line. MTAB is a wholly owned subsidiary of the mining company Luossavaara–Kiirunavaara . In Norway, operations are handled by the subsidiary Malmtrafikk AS...
(MTAS) for pulling iron ore trains on Malmbanan
Malmbanan
The Iron Ore Line is a long railway line between Riksgränsen and Boden in Norrbotten County, Sweden. The line contains two branches, from Kiruna to Svappavaara and from Gällivare to Koskullskulle. The term is often colloquially used to also include the Ofoten Line, from Riksgränsen to Narvik in...
in Sweden and Ofotbanen in Norway. A total of 39 double-locomotives (Dm) were delivered between 1953 and 1971, built by ASEA. A further 19 center locomotives (Dm3) were later delivered. Norges Statsbaner of Norway also operated 12 similar locomotives, designated NSB El 12
NSB El 12
NSB El 12 was an electric locomotive used by Norges Statsbaner to haul iron ore trains on Ofotbanen between 1957 and 1990. The locomotives were based on the Swedish Dm that was used with success on the connecting Malmbanan. The eight units were always operated in pairs or in triples and were...
. The Dm is a slower, freight-optimized version of the Da
SJ Da
Da is a series of locomotives used by Statens Järnvägar of Sweden. 93 units were built by ASEA between 1953-60. They remained in service until the 1990s.-History:...
-locomotive.
History
The iron ore trains on MalmbananMalmbanan
The Iron Ore Line is a long railway line between Riksgränsen and Boden in Norrbotten County, Sweden. The line contains two branches, from Kiruna to Svappavaara and from Gällivare to Koskullskulle. The term is often colloquially used to also include the Ofoten Line, from Riksgränsen to Narvik in...
between Luleå
Luleå
- Transportation :Local buses are run by .A passenger train service is available from Luleå Centralstation on Sweden's national SJ railway service northbound to Narvik on the Norwegian coast, or southbound to Stockholm. See Rail transport in Sweden....
in Sweden and Narvik
Narvik
is the third largest city and municipality in Nordland county, Norway by population. Narvik is located on the shores of the Narvik Fjord . The municipality is part of the Ofoten traditional region of North Norway, inside the arctic circle...
in Norway had been using the Of for a long time, and Statens Järnvägar chose to order new locomotives for Malmbanan at the same time as they ordered the Da
SJ Da
Da is a series of locomotives used by Statens Järnvägar of Sweden. 93 units were built by ASEA between 1953-60. They remained in service until the 1990s.-History:...
-locomotives. At first 24 double locomotives were delivered in 1953, but in the 1960s SJ ordered additional 15 double sets. These were given more powerful engines, though the older five double sets were later rebuilt. These double locomotives could pull 3,400 tonne trains, but this was not sufficient during the end of the 1960s so SJ ordered 19 new center locomotives. These were mounted permanently between each of the Dm-locomotives, without its own drivers cabin, and designated Dm3. This allowed trains up to 5,400 tonnes. Instead of ordering Dm3s, NSB chose a different and more powerful locomotive, the NSB El 15
NSB El 15
NSB El 15 is a class of electric locomotives which are now operated by the Swedish company Hector Rail as Class 161 locomotives. The locomotives were originally built for the Norwegian State Railways in 1967 to replace the NSB El 3 and NSB El 4 engines on Ofotbanen...
. From 1979 and a few years onward the cabins were modernised, with new instrumentation and less noise.
In the 1980s most of the double locomotive sets were moved other places on SJs network. In 1996 the operation of Malmbanan was transferred to MTAB, who also took over all the triple engines and some of the double engines. They were redesignated Dm2 (for double locomotives) and Dm3 for triple locomotives. From 2000 the new IORE
IORE
Iore, often stylized IORE, is a class of 26 electric locomotives built by Adtranz and its successor Bombardier Transportation for the Swedish mining company LKAB's railway division Malmtrafik. The class is a variation of Adtranz's Octeon modular product platform, thus related to Bombardier's later...
locomotives were delivered, and all the Dm2s and some of the Dm3s were taken out of service. In 2004 one set was donated to the heritage society Malmbanans Vänner, who also owns one El 12. MTAB has announced that they will take the Dm3 out of service by 2011 when enough IORE locomotives are available to relieve them.