X1 was a series of two-car electric multiple units (

twin unit A twin unit or twinset is a set of two railroad cars or locomotives which are permanently coupled and treated as if they were a single unit. A twinset of cars or coaches can also be called a twin car. In US passenger railroad parlance, twin u ...

s) operated by Greater Stockholm Transport (SL) on the Stockholm commuter rail. The X1 was operated in sets of up to five units, making ten-car trains, each unit consisting of one motor car and one unpowered car. 104 units were built by

ASEA ''Allmänna Svenska Elektriska Aktiebolaget'' (English translation: General Swedish Electrical Limited Company; Swedish abbreviation: ASEA) was a Swedish industrial company. History ASEA was founded in 1883 by Ludvig Fredholm in Västerås a ...

in 1967–75 and were replaced by the new X60. The X1 also served as the foundation for the later X10–X14 series trains, built in the 1980s and 1990s.

History

The X1 was based on the

SJ X6 X6 was a series of three-car electric multiple units operated by Statens Järnvägar (SJ) of Sweden as local trains around Stockholm and Göteborg. Three units were built by Allmänna Svenska Elektriska Aktiebolaget (ASEA) in 1960 and were in s ...

taken into service in the 1960s, that had replaced locomotive-pulled trains. The X1 interior was based more on the Stockholm Metro with five-abreast seating and three doors per car. Since the start in 1968 the trains were renovated several times, although they look mostly the same today as they did in the 1960s. An X1 train was used as a test train during the development of the

high speed train High-speed rail (HSR) is a type of rail system that runs significantly faster than traditional rail, using an integrated system of specialised rolling stock and dedicated tracks. While there is no single standard that applies worldwide, lines ...

X2000, with technologies and techniques such as

tilt Tilt may refer to: Music * Tilt (American band), a punk rock group, formed in 1992 * Tilt (British band), an electronic music group, formed in 1993 * Tilt (Polish band), a rock band, formed in 1979 Albums * ''Tilt'' (Cozy Powell album), 1981 * ...

being added, that would later make it into the final train (X2000). With these adjustments, this X1 train managed to reach a speed of 222 km/h during testing, which was a new record for the train. They were completely compatible with the X10 introduced in the 1980s. The X1 began to be taken out of service in 2004 and were planned to be completely retired in 2007/2008. Due to problems with the new X60 trains the deadline was delayed several times. The last X1 units were taken out of service in April 2011. One unit has been preserved at the

Swedish Railway Museum The Swedish Railway Museum, ( sv, Sveriges Järnvägsmuseum), in Gävle, Gästrikland, Sweden is the national museum for Sweden's railway history. The Swedish Railway Museum is tasked with acquiring, preserving and supplying knowledge about Swedis ...

in Gävlehttps://www.jarnvagsmuseet.se/globalassets/jarnvagsmuseet/dokument/samlingar/fordon/t_fordonslistor_jarnvagsmuseets-stjarnor.pdf File:Pendeltåg i Nynäshamn, 1975.jpg, SL X1 in original livery at Nynäshamn, 1975 File:Nedisat Pendeltåg.jpg, X1 in winter, 2006

References

External links

*
Järnväg.net on X1

Swetramway on X1
{{Swedish railway stock ASEA multiple units Rail transport in Stockholm X1 15 kV AC multiple units