|This article does not cite any sources. (December 2015) (Learn how and when to remove this template message)|
X1 in winter
|Line(s) served||Stockholm commuter rail|
|Train length||49,550 mm (162 ft 6.8 in)
|Maximum speed||120 km/h (75 mph)|
|Weight||78 t (76.8 long tons; 86.0 short tons)|
|Power output||1,120 kW (1,500 hp)|
|Electric system(s)||15 kV 16 2⁄3 Hz AC catenary|
|Current collection method||Pantograph|
|Track gauge||1,435 mm (4 ft 8 1⁄2 in)|
X1 was a series of two-car electric multiple units 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 in 1967–75 and were replaced by the new X60. The X1 is also the foundation for the upcoming X10–X14 series trains, built in the 1980s and 1990s.
The X1 was based on the SJ X6 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. They are completely compatible with the X10 introduced in the 1980s. The X1 was started taken out of service in 2006 and was planned to be out of service 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 on April 1st 2011. Today (April 2011) there are still 12 units left, that are currently waiting to be scrapped.