British Rail Class 717

British Rail Class 717
Desiro City
Great Northern Class 717 unit at Palmers Green
The standard-class interior of a Class 717 unit
In service28 September 2018 – present
ManufacturerSiemens Mobility
Built atKrefeld, Germany
Family nameDesiro City
ReplacedClass 313
Constructed2018
Number built25
Formation
  • 6 cars per unit:
  • DMOS-TOS-TOS(L)W-MOS-PTOS-DMOS
Fleet numbers717001–717025
Capacity362 seats
OwnersRock Rail[1]
OperatorsGreat Northern
DepotsHornsey (London)
Lines served
Specifications
Car body constructionAluminium[2]
Train length121.7 m (399 ft 3 in)
Car length20.2 m (66 ft)
Width2.80 m (9 ft 2 in)
Floor height1.10 m (3 ft 7 in)
DoorsDouble-leaf pocket sliding, each 1,500 mm (59 in) wide (2 per side per car)
Wheel diameter820–760 mm (32.28–29.92 in) (new–worn)[3]
Wheelbase
  • Motor bogies: 2,200 mm (87 in)
  • Trailer bogies: 2,100 mm (83 in)[3]
Maximum speed85 mph (137 km/h)
Weight204 t (201 LT; 225 ST)
Axle load
  • Motor bogies: 15.5 t (15.3 LT; 17.1 ST)
  • Trailer bogies: 14.5 t (14.3 LT; 16.0 ST)[3]
Traction systemSiemens IGBT
Power output1,200 kW (1,600 hp) at wheels
Acceleration0.85 m/s2 (1.9 mph/s)
Electric system(s)
Current collector(s)
UIC classification
  • Bo′Bo′+2′2′+2′2′+Bo′Bo′+2′2′+Bo′Bo′
BogiesSiemens SGP SF7000[4]
Minimum turning radius120 m (390 ft)[3]
Braking system(s)Electro-pneumatic (disc) and regenerative
Safety system(s)
Coupling systemDellner
Track gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge
Notes/references
Sourced from [8] unless otherwise noted.

The British Rail Class 717 Desiro City[9] is an electric multiple unit passenger train built by Siemens Mobility, currently operated by Govia Thameslink Railway on its Great Northern Hertford Loop and Welwyn stopping routes. Built to replace Class 313 trains on services into Moorgate, a total of 25 six-car units began entering regular service from March 2019.[10][11] The units are similar to the Class 700s (in use with Thameslink) and the Class 707s (in use with Southeastern).

  1. ^ Sherratt, P., ed. (2023). "ROSCO Fleets". Modern Railways: Review 2023. Stamford: Key Publishing. pp. 18–19. ISBN 978-1-80282-569-5.
  2. ^ Desiro City Electrical Multiple Unit for Thameslink (PDF) (2014 ed.). Berlin: Siemens Mobility. Archived (PDF) from the original on 29 October 2020.
  3. ^ a b c d SF7000: Bogie-platform for electrical multiple units (PDF) (05/2020 ed.). Graz: Siemens Mobility Austria. Art. No. MORS-B10032-00. Archived (PDF) from the original on 30 September 2020.
  4. ^ Desiro City - Evolution in Motion (PDF) (2016 ed.). München: Siemens Mobility. Archived (PDF) from the original on 20 November 2020.
  5. ^ "Digital signalling for East Coast main line tested on Thameslink". Rail Insider. Business Daily Group. 21 September 2021. Archived from the original on 30 April 2023. Retrieved 20 November 2021.
  6. ^ "Class 717 Production Passes Halfway". Modern Railways. Stamford: Key Publishing. 24 May 2018. Retrieved 18 October 2022.
  7. ^ Clinnick, R. (April 2023). "Modernising the Moorgate branch". Rail Express. No. 323. Horncastle: Mortons Media Group. p. 87. ISSN 1362-234X.
  8. ^ Desiro City Class 717 Electrical Multiple Units for Govia Thameslink Railway (PDF) (2018 ed.). München: Siemens Mobility. Art. No. MOML-T10055-00-7600. Archived from the original (PDF) on 30 November 2020.
  9. ^ Clinnick, R. (8 June 2016). "New Govia Thameslink Railway trains to be Class 717s". Rail Magazine. Peterborough: Bauer Consumer Media. Retrieved 9 June 2016.
  10. ^ Clinnick, R. (25 March 2019). "Great Northern Class 717s finally enter passenger service". Rail Magazine. Peterborough: Bauer Consumer Media. Retrieved 12 June 2023.
  11. ^ "New trains for Moorgate services". Great Northern. Newcastle upon Tyne: Govia Thameslink Railway. Archived from the original on 27 March 2019.


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