SL C20

The SL C20 is a type of subway train used in the Stockholm metro, Sweden. Between 1997 and 2004, 271 3-car sets, numbered 2000–2270, were delivered to Stockholm by the former Kalmar Verkstad, owned by Adtranz, later acquired by Bombardier Transportation. The C20 is a completely new design and therefore is not compatible with other train types in the system. At 46.5 metres (152 ft 6+3⁄4 in), each carriage is longer than the previous train types. To save cost and weight, each unit has only four bogies. The middle car has two bogies. The end parts consist of one bogie each and are connected to the central portion via a semi-trailer-direction. Trolley subframes are made of stainless steel, and are less susceptible to corrosion.

SL C20
A C20 train at Sankt Eriksplan on Line 19 to Hässelby strand
The interior of a refurbished C20
In service10 May 1998 – present[1]
ManufacturerKalmar Verkstad
Bombardier Transportation
Built atKalmar, Sweden
Family nameMovia
Replaced
  • All C2, C3, C4 and C8
  • Most C6
Constructed1997–2004
Refurbished2019–2023 at Västerås, Västmanland
Number built
  • C20: 810 carriages (270 sets)
  • C20F: 3 carriages (1 set)
Number in service
  • C20: 810 carriages (270 sets)
  • C20F: 3 carriages (1 set)
Formation3 cars (A-C-B) per unit, 2-3 units per train
Fleet numbers
  • 2000 (C20F)
  • 2001–2270 (C20)
Capacity126 seated, 288[lower-alpha 1] standing
Operator(s)MTR (under contract from Storstockholms Lokaltrafik)
Depot(s)Hammarby, Högdalen, Norsborg, Nyboda, Rissne, Vällingby
Line(s) servedAll Stockholm metro lines
Specifications
Car body constructionStainless steel
Train length46.5 m (152 ft 6+45⁄64 in)
Width2.9 m (9 ft 6+11⁄64 in)
Height3.68 m (12 ft 7⁄8 in)
Platform height1.15 m (3 ft 9+1⁄4 in)
Doors
  • 2 pairs per side for front/back cars
  • 3 pairs per side for middle car
Wheel diameter780 mm (31 in)
Maximum speed
  • 90 km/h (56 mph) (design)
  • 80 km/h (50 mph) (Red and Blue lines; service)
  • 70 km/h (43 mph) (Green line; service)
Weight67 t (66 long tons; 74 short tons)
Traction system
  • Bombardier MITRAC TC1410 IGBT–VVVF (as built)
  • Bombardier MITRAC TC1500 SiC–VVVF (2017-2018 trial)[3][4]
Traction motors8 × ABB MJA 220-1 125 kW (168 hp) 3-phase AC induction motor
Power output1 MW (1,300 hp)
HVAC
  • Forced-air ventilation with driver's compartment air-conditioning and heater (C20)
  • Air-conditioning and heater (C20F)
Electric system(s)650–750 V DC third rail
Current collector(s)Contact shoe
UIC classificationBo′+Bo′Bo′+Bo′
BogiesBombardier FLEXX Metro 2000
Safety system(s)ATC/ATO
Coupling systemDellner
Track gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge

When the C20 was sold as the Vagn 2000 (English: Wagon 2000), it was marketed as the subway car of the future, though the only customer outside of Stockholm would be the Bucharest Metro, with an order for 18 trains that would be based upon the C20 in 1999, with an additional 26 units later in 2004. All C20 coaches have been given their own names, all proposed by private individuals. Many of the names are linked to Stockholm; for example, coach no. 2012 was christened Estelle, after the Christening of Princess Estelle.

Refurbishment

The C20F and the 270 3-car C20 sets will undergo a mid-life refurbishment at the Bombardier Transportation factory in Västerås, Västmanland between 2019 and 2023. During this period, the refurbished sets will be referred to as C20U or C25. The refurbishment will increase the standing capacity of all sets by converting one side of each car to all-longitudinal seating instead of the all-transverse seating currently in use, as well as removing a portion of seats in each end of a carriage to create spaces for wheelchairs and strollers. All seat upholstery will also be replaced and new yellow upholstery to designate priority seating will also be introduced, and each refurbished C20 set will be retrofitted with 16 CCTV cameras, an increase of 6 such cameras in each car prior to refurbishment.

C20F

The C20F is a related prototype, built with "FICAS" technology – a highly innovative modular construction that uses a stainless steel skin bonded to a rigid composite core. This construction results in an extremely thin wall (25mm instead of the C20's 100mm), thereby creating a more spacious interior without altering the outer profile.

The C20F has air conditioning in both the driver's cab and the passenger compartments, whereas the C20 has air conditioning in the driver's cab only. The exterior of the C20F differs by having smooth trolley sub-frames instead of the corrugated trolley sub-frames present in the C20.

The C20F car assigned set 2000 and originally christened Incognito, then rechristened Elvira on 22 May 2012, when C20 set 2012, previously christened Elvira, was rechristened the Estelle on the occasion of Princess Estelle's baptism.[5]

The C20F operates on the Green Line of the Stockholm metro.

  • The C20F train at Gullmarsplan
    The C20F train at Gullmarsplan
  • C20F Interior
    C20F Interior
  • C20F Interior
    C20F Interior
  • C20F Interior
    C20F Interior
  • C20F side-by-side with C20
    C20F side-by-side with C20

Notes
  1. 317[2] for C20F

References
  1. "Tunnelbanan". Lokman.se. Retrieved 20 December 2021.
  2. "Metro C20 – Stockholm, Sweden". Bombardier. Archived from the original on 15 August 2017. Retrieved 14 January 2023.
  3. "Bombardier Celebrates Success of New Energy-Saving Propulsion Technology". Bombardier Transportation. 15 March 2018. Archived from the original on 12 August 2021. Retrieved 3 August 2021.
  4. "Silicon Carbide MOSFET Traction Inverter Operated in the Stockholm Metro System Demonstrating Customer Values" (PDF). Retrieved 30 August 2021.
  5. C20 2012 byter namn
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