SJ There

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SJ There
Since 937 in the Grängesberg Railway Museum
Since 937 in the Grängesberg Railway Museum
Numbering: 790-823, 883-941
Number: 93
Manufacturer: ASEA
Year of construction (s): 1952-1957
Axis formula : 1'C1 '
Length over buffers: 13000 mm
Empty mass: 75 t
Top speed: 100 km / h
Continuous output : 1840 kW
Power system : 15 kV 16.7 Hz ~
Number of traction motors: 2
Drive: Rod drive

The Swedish Da series is an electric locomotive for universal use that was built from 1953 for the Swedish state railways Statens Järnvägar .

history

The Swedish State Railways electrified many lines between 1940 and 1960. Due to the resulting demand for electric locomotives, 100 locomotives with three driving axles were ordered from ASEA. In 1957 the last of a total of 93 Da locomotives was completed. From 1990 the decommissioning and scrapping of the Da began .

As universal locomotives, the Da could be found all over Sweden. It was used in passenger and freight train services. Due to the multiple control, heavy trains could be run with the locomotives.

The two-part Dm and the three-part Dm3 for ore transport in northern Sweden were developed from the Da .

technology

The Da is based on the reliable and proven D series , which was developed for the SJ in the 1940s. Sweden had a long tradition of rod-driven electric locomotives and had doubts about the serviceability of the single-axle drive , so another rod-electric locomotive was ordered, although this concept was already considered obsolete by many railways at the time.

Compared to its older sisters in the D series, many changes were made so that the only thing the locomotive had in common with its predecessor series was the wheel arrangement. Driving wheel sets, bearings and traction motors were new designs. The cooling air inlet was moved from the side wall to the roof. The driver's cabs were given windows with rubber seals, which gives the locomotive a more modern look than the D-series. The locomotives were also equipped for multiple traction, so that up to three locomotives could be operated from one driver's cab.

The locomotives were initially delivered with spoked wheels. The locomotives had poor running behavior due to the imbalance of the rod drive, which was particularly noticeable in fast passenger traffic. The forces between the wheel and the rail were so high that wheel star fractures occurred again and again. The problem was scientifically investigated by technicians from the SJ, and for the first time a useful method for measuring the forces between wheel and rail was developed.

In the 1970s, all Da -looks were fitted with rubber-sprung wheels. This resulted in significantly better running properties. In tests, a locomotive even reached 160 km / h.

Despite the modification, the locomotive retained its good properties: With an operating weight of 75 tons and the rod drive, it is almost impossible to make the locomotive skid. This enabled heavy trains to be pulled even with the rather low output of 1840 kW.

Some of the locomotives were later given the "Nordlandführer's cabins" with particularly good thermal insulation.

drive

The Da is driven by two single-phase motors in series , which are supplied via a transformer with a step switch. The motors work via a gearbox on the jackshaft between the three driving axles . The drive axles are connected to the driven jackshaft via coupling rods . The first and last axles of the locomotive are running axles . They serve to reduce the axle load and improve track guidance. The encoder for the speedometer and the anti-skid protection is connected to a running axle.

Whereabouts

The following Da locomotives are in use or preserved in a museum:

  • Da 790 (the first locomotive in the series) was given to the Sveriges Järnvägsmuseum in 1989 . In 2011 Stockholm's Kultursällskap för Ånga och Järnväg (SKÅJ) bought the locomotive for 30,000 crowns for their museum in Krylbo.
  • Da 941 was sold to the Kalmar Järnvägars Museiföreningen in 1990. From there it went to the private company Shortline Väst in 1995 .

SLV There

The private company Shortline Väst (SLV) acquired several locomotives which were later resold:

  • Da 804 - 1997 from SJ - SLV Da 804 - 1998 to BK Tåg - BK Tåg Da 804
  • Da 887 - 1997 from SJ - SLV Da 887 - 1998 to BK Tåg - BK Tåg Da 887
  • Da 903 - 1995 from SJ - SLV Da 903 - 2001 to Falköpings Terminal AB - FT Da 903
  • Da 941 - 1995 from Kalmar Järnvägars Museiföreningen - SLV Da 941 - 1999 to TKAB - TKAB Da 15

BK Tåg Da

  • BK Tåg Da 804 - 1998 from Shortline Väst - 2001 to Falköpings Terminal AB - FT Da 804
  • BK Tåg Da 887 - 1998 from Shortline Väst - 2001 to Falköpings Terminal AB - FT Da 887

Svenska Tågkompaniet Da

  • TKAB Da 15 - 1999 from Kalmar Järnvägars Museiföreningen - 2007 to NetRail AB - NR Da 941

Falköpings Terminal AB Da

  • FT Da 804 - 2001 from BK Tåg - 2005 to Tågfrakt AB - TAB Da 804
  • FT Da 887 - 2001 from BK Tåg - 2005 to Tågfrakt AB - TAB Da 887
  • FT Da 903 - 2001 from SLV - 2005 to Tågfrakt AB - TAB Da 903

NetRail AB Da

  • NR Da 804 - 2011 by NetRail - scrapped in 2012
  • NR Since 887 - 2011 by NetRail - parked in Nässjö in 2012
  • NR Da 903 - 2011 from NetRail
  • NR Da 941 - 2007 from Svenska Tågkompaniet - 2015 to Nässjö Järnvägsmuseum

Tågfrakt AB Da

  • TAB Da 804 - 2005 from Falköpings Terminal AB - 2011 to NetRail - NR Da 804
  • TAB Da 887 - 2005 from Falköpings Terminal AB - 2011 to NetRail - NR Da 887
  • TAB Da 903 - 2005 from Falköpings Terminal AB - 2011 to NetRail - NR Da 903

Malmtrafik AB There

  • Since 889 - 1996 by SJ - is available at MTAB in Kiruna for use with the rescue train , EVN: 91 74 0000889-7.

literature

Web links

Individual evidence

  1. ^ Electric locomotive. Stockholms Kultursällskap för Ånga och Järnväg, accessed January 12, 2017 (Swedish).
  2. ↑ Da 941. svenska-lok.se, accessed on January 12, 2017 (Swedish).
  3. ^ Shortline Väst - SLV, Historia och lok översikt. svenska-lok.se, accessed January 12, 2017 (Swedish).
  4. ↑ SLV Since 941. svenska-lok.se, accessed on 12 January 2017 (Swedish).