SJ F

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Ma
Ma
F 621 at the Swedish Railway Museum
Power type Electric
Builder ASEA
Build date 1942-1949
Total production 17
UIC classification 1'Do1'
Gauge 1,435 mm (4 ft 8½ in)
Wheel diameter 1,000 mm
Length 15,230 mm
Height 4,500 mm
Locomotive weight 102.2 tonnes
Electric system(s) 15 kV 16⅔ Hz AC
Top speed 135 km/h
Power output 2,580 kW
Tractive effort 203 kN
Career Statens Järnvägar
Number 601-603, 621-632, 694-702

F is an electric locomotive used by Statens Järnvägar (SJ) of Sweden for hauling passenger trains. It was built in 24 copies by ASEA 1942-49 and was in service to 1983.

[edit] History

During the 1930 the standard on Västra Stambanan between Stockholm and Göteborg was improved so the top speed was increased to 120 km/h. At the time SJ did not have locomotives that could reach that speed, so an intensive work was initiated to construct a fast locomotive in cooperation with ASEA. The alternatives were traditional wheel construction or the newer bogie technology. SJ chose the latter with wheel arrangement 1'Do1', with four powered axles. Exterior wise the F-series was very similar to the D-series.

The three test engines delivered in 1942 had different configurations of power transmission. After the testing an addition 21 locomotives were delivered during the 1940s. They differ by only having two instead of three front windows, though the first three were later rebuilt.

The F-series was put into fast express trains on the lines between Malmö and Stockholm, between Malmö and Göteborg, between Stockholm and Göteborg, and between Stockholmn and Oslo, Norway. When the Rc-series came in the late 1960s and during the 1970s the majority of the F-series was moved to Ostkustbanan and the line between Göteborg and Kalmar. Most of the F-series were retired between 1978 and 1983. The last regular traffic with the series was in the Stockholm area. During this last period the top speed was reduced from 135 to 100 km/h. Three of the locomotives have been preserved.

[edit] External links