SJ D
Encyclopedia
D is a series of locomotive
s used by Statens Järnvägar
(SJ) of Sweden. 333 units were built by ASEA
between 1925-43. It was used for both passenger and freight trains until it was taken out of service in 1988.
, it was not suitable for use on the main lines, due to low speeds. To solve this problem SJ surveyed a large section of locomotives abroad, before concluding with a design and placed an order with ASEA for 50 units. While ASEA was responsible for the electrical components, ASJ, NOHAB
and Motala Verkstad were responsible for the mechanical parts. The first series consisted of two models, the Ds used for express trains and the Dg for freight trains. The former had 90 km/h as maximum speed while Dg only had 70 km/h. The first units were delivered in 1925 and tested on Malmbanan until Västra Stambanan
between Stockholm
and Göteborg was finished in 1926. Additional deliveries were made until 333 units had been delivered by 1943. Through the history of production the original wooden body was replaced with a steel construction.
all wooden-bodied examples were rebuilt to Dg. It was in use until 1976. Eventually many Dgs were rebuilt to Du. In total 186 units have had the Dg designation, though not at the same time.
-locos stated in 1953, the Dks were rebuilt to the same engine, and received the designation Du. The last use of Dk was in 1975. In total 117 have had the Dk designation, of which 73 were built as Dk.
. Many of the engines also lost their gangway connections. In this rebuilding the difference between passenger and freight locos disappeared, since they now were capable of 100 km/h. The Du became a universal locomotive, though in the end it was mainly used for freight trains. It disappeared from service in 1977, with the dismantle of the wooden locos, while the steel units were rebuilt to Du2. 244 of the D units have had the Du designation.
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) of Sweden. 333 units were built by ASEA
ASEA
Allmänna Svenska Elektriska Aktiebolaget was a Swedish industry company. It merged with the Swiss Brown, Boveri & Cie in 1988 to form Asea Brown Boveri...
between 1925-43. It was used for both passenger and freight trains until it was taken out of service in 1988.
History
Though SJs first electric locomotive was the Oa series used 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...
, it was not suitable for use on the main lines, due to low speeds. To solve this problem SJ surveyed a large section of locomotives abroad, before concluding with a design and placed an order with ASEA for 50 units. While ASEA was responsible for the electrical components, ASJ, NOHAB
NOHAB
NOHAB was a manufacturing company in the city of Trollhättan, Sweden.The company was founded by Antenor Nydqvist, Johan Magnus Lidström and Carl Olof Holm in 1847 as Trollhättans Mekaniska Verkstad as a manufacturer of turbines for hydraulic power plants...
and Motala Verkstad were responsible for the mechanical parts. The first series consisted of two models, the Ds used for express trains and the Dg for freight trains. The former had 90 km/h as maximum speed while Dg only had 70 km/h. The first units were delivered in 1925 and tested on Malmbanan until Västra Stambanan
Västra stambanan
The Western Main Line is the main railway line between Stockholm and Gothenburg in Sweden. The line is electrified and consists entirely of double track, except the four-track sections between Gothenburg Central Station and Olskroken , in Järna Station , and south of Stockholm, between...
between Stockholm
Stockholm
Stockholm is the capital and the largest city of Sweden and constitutes the most populated urban area in Scandinavia. Stockholm is the most populous city in Sweden, with a population of 851,155 in the municipality , 1.37 million in the urban area , and around 2.1 million in the metropolitan area...
and Göteborg was finished in 1926. Additional deliveries were made until 333 units had been delivered by 1943. Through the history of production the original wooden body was replaced with a steel construction.
Versions
The subdesignation of the D-locomotives follows the function and not the appearance of the locos. To begin with one separated between freight and passenger locomotives, but from the Du-locomotive this separation disappeared since it could haul a freight train at 100 km/h.Ds
Ds was the original D-locomotive made for passenger trains. A first they had maximum speed of 90 km/h, but after 1936 they were increased to 100 km/h. Production halted after a more powerful engine was introduced and new locomotives were designated Dk. The Ds locomotives were eventually transformed into Dk locomotives, and the designation Ds disappeared. 159 locos have once had been designated Ds.Dg
Dg was the other original D-locomotive, geared for maximum 70 km/h and optimized for freight trains. From 1936 the max speed was increased to 75 km/h. This type was also later given a more powerful engine, but not a new designation. Thus there have been two types of Dg-locos. During World War IIWorld War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...
all wooden-bodied examples were rebuilt to Dg. It was in use until 1976. Eventually many Dgs were rebuilt to Du. In total 186 units have had the Dg designation, though not at the same time.
Dk
When the passenger locomotives were given more powerful motors, they were designated Dk. They had a maximum speed of 100 km/h. This is the last series of locomotives that was built new, all later types have been rebuilt, except the one-off experimental subtype Dr. The last Dk loco was built in 1943 and concluded eighteen years of D production. When the production of DaSJ 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:...
-locos stated in 1953, the Dks were rebuilt to the same engine, and received the designation Du. The last use of Dk was in 1975. In total 117 have had the Dk designation, of which 73 were built as Dk.
Du
This locomotive came into existence during the 1950s when the Dk, Ds and Dg locos were upgraded to motors of the same type as in DaSJ 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:...
. Many of the engines also lost their gangway connections. In this rebuilding the difference between passenger and freight locos disappeared, since they now were capable of 100 km/h. The Du became a universal locomotive, though in the end it was mainly used for freight trains. It disappeared from service in 1977, with the dismantle of the wooden locos, while the steel units were rebuilt to Du2. 244 of the D units have had the Du designation.