SJ M
| SJ M / SJ Mg | |
|---|---|
 M 620 in Gävle
|
|
| Numbering: | 604-620 |
| Number: | 17th |
| Manufacturer: | mech .: Vagn- & Maskinfabriksaktiebolaget Falun and Nydqvist och Holm , el .: Allmänna Svenska Elektriska Aktiebolaget , Sweden 
|
| Year of construction (s): | 1944: 604-617, 619, 620 1945: 618 |
| Axis formula : | Co'Co ' |
| Gauge : | 1435 mm ( standard gauge ) |
| Length over buffers: | 16,800 mm |
| Trunnion Distance: | 8,800 mm |
| Bogie axle base: | 2,200 + 2,000 mm |
| Total wheelbase: | 12,000 mm |
| Service mass: | 102 t |
| Wheel set mass : | 17 t |
| Top speed: | 80 km / h |
| Continuous output : | 2,640 kW |
| Driving wheel diameter: | 1,000 mm |
| Power system : | 15 kV 16 2/3 Hz AC |
| Power transmission: | Overhead line |
| Number of traction motors: | 6 × ASEA KJ 88 with 440 kW each |
| Bogie wheelbase: 2.2 + 2.0 m | |
The SJ M series were electric locomotives built by Allmänna Svenska Elektriska Aktiebolaget (ASEA) for the Swedish State Railways Statens Järnvägar (SJ) . The mechanical part was supplied by Vagn- & Maskinfabriksaktiebolaget Falun and Nydqvist och Holm in Trollhättan .
The locomotives delivered in 1944 and 1945 were among the first Swedish bogie locomotives.
history
After the Norrland lines were electrified in the early 1940s, SJ needed a powerful electric locomotive to haul the heavy freight trains, especially on the Långsele - Boden route .
The D series was too weak for long distances in the north and the Of series locomotives were too long for good cornering. The demand for greater tractive power also meant the move away from the low-voltage control used in the D series towards the high-voltage control, which was already in use in the F series built in 1942 . Since the locomotive was heavy due to its motorization, it was given the Co'Co ' wheel arrangement.
The SJ were initially very skeptical about the construction of bogie locomotives. However, they were a very good alternative to the rod locomotives. During construction, it was possible to fall back on experience with the Ha , Hb and Hc series that were already in use .
Technical design
The locomotives received locomotive bodies made of steel using welding technology. However, there were problems with cracking. Traditional riveting techniques were therefore used for repairs.
The machinery was not constructed symmetrically, with the result that the locomotive had an asymmetrical appearance. This was made visible through side windows, as the corridor through the engine room was laid out on the side.
As early as July 1945, all units were in operation every day of that month.
SJ Mg
In 1956 the series was given the new name Mg .
commitment
Mg 606 was the first locomotive to be retired and scrapped in Notviken in 1959. The first shutdowns within the series began in 1975. The last two locomotives in service were the Mg 608 and Mg 620 , which were shut down in 1981.
Preserved locomotive
The Mg 620 was sold to Stockholms Kultursällskap för Ånga och Järnväg (SKÅJ) in Stockholm in 1981 and restored to working order as the M 620 between 1985 and 1994 .
Web links
- Description of the locomotive series. järnväg.net, accessed August 25, 2017 (Swedish).
- SJ M / Mg. In: svenska-lok.se. Retrieved August 25, 2017 (Swedish).
Individual evidence
- ^ Tore Nordin, Lennart Wretman, Ove Grundstedt: Svenska Ellok . In: Svenska Järnvägsklubbens skrift series . No. 67 , 1998, ISBN 91-85098-84-1 .
- ^ Electric locomotive SJ M 620. Stockholms Kultursällskap för Ånga och Järnväg, accessed on August 25, 2017 (Swedish).
- ↑ SKÅJ: s electric locomotive SJ M 620. Stockholms Kultursällskap för Ånga och Järnväg, accessed on August 25, 2017 (Swedish).