British Rail Class 317

British Rail Class 317
Greater Anglia Class 317/1 at Cambridge North in 2017
Greater Anglia Class 317/5 standard-class saloon in 2021
In service	28 March 1983 – July 2022
Manufacturer	British Rail Engineering Limited
Built at	Litchurch Lane Works, Derby (317/1 TCO bodyshells only) Holgate Road Works, York (remainder)
Family name	BR Second Generation (Mark 3)
Replaced	Class 127 Class 302 Class 310 Class 312
Constructed	1981–1982 1985–1987
Refurbishment	2000–2006 (Stansted Express) 2006–2007 (First Capital Connect) 2013–2015 (Greater Anglia) 2015–2018 (London Overground)
Number built	72
Number preserved	2 vehicles
Number scrapped	65
Successor	Class 357 Class 365 Class 379 Class 387 Class 710 Class 720
Formation	4 cars per unit; 317/6 units: DTSO-MSO-TSO-DTCO All others: DTSO-MSO-TCO-DTSO
Diagram	317/1 DTSO vehicles: EE216, EE232, & EE235 317/1 MSO vehicles: EC202 317/1 TCO vehicles: EH307 317/2 DTSO vehicles: EE224 & EE225 317/2 MSO vehicles: EC205 317/2 TCO vehicles: EH308
Fleet numbers	As built: 317/1: 317301–317348 317/2: 317349–317372 Following renumberings: 317/1: 317337–317348 317/5: 317501–317515 317/6: 317649–317672 317/7: 317708–317710, 317714, 317719, 317722–317723, 317729, 317732 317/8: 317881–317892
Capacity	As built: 292 seats (22 first-class, 270 standard)
Operator(s)	British Rail c2c Greater Anglia Great Northern First Capital Connect London Overground National Express East Anglia Network SouthEast Thameslink West Anglia Great Northern
Specifications
Car body construction	Steel
Car length	DT vehs.: 19.830 m (65 ft 0.7 in) Others: 19.920 m (65 ft 4.3 in)
Width	2.816 m (9 ft 2.9 in)
Height	3.774 m (12 ft 4.6 in)
Floor height	1.144 m (3 ft 9.0 in)
Doors	Double-leaf pocket sliding, each 1.010 m (3 ft 3.8 in) wide (2 per side per car)
Wheelbase	Over bogie centres: 14.170 m (46 ft 5.9 in)
Maximum speed	100 mph (160 km/h)
Weight	DTSO vehs.: 29.5 tonnes (29.0 long tons; 32.5 short tons) MSO vehs.: 49.0 tonnes (48.2 long tons; 54.0 short tons) TCO vehs.: 28.3 tonnes (27.9 long tons; 31.2 short tons)
Traction motors	4 × GEC G315BZ (248 kW (332 hp) each)
Power output	990 kW (1,328 hp)
Electric system(s)	Template:25 kV 50 Hz overhead
Current collection method	Pantograph
UIC classification	2′2′+Bo′Bo′+2′2′+2′2′
Bogies	Powered: BREL BP20 Unpowered: BREL BT13
Minimum turning radius	70.4 m (231 ft 0 in)
Braking system(s)	Electro-pneumatic (disc) (Westinghouse)
Safety system(s)	AWS TPWS
Coupling system	Tightlock
Multiple working	Within class
Track gauge	1,435 mm (4 ft 8 1⁄2 in) standard gauge
Notes
Specifications as at November 1988, except where otherwise noted.

Class 317/1, no. 317305 at Cambridge on 23rd May 2003. This unit was one of several loaned by WAGN to LTS Rail from 1996-1999, which involved the red stripe of the NSE livery being repainted green. This unit is now numbered 317505 and operated by Greater Anglia.

The British Rail Class 317 electric multiple units were built by BREL at York Works in two batches, from 1981-82 and 1985-87. They were the first of several classes of British Rail EMU to be based on the all-steel Mark 3 bodyshell, departing from the "PEP"-aluminium design which had spawned the earlier Class 313 to Class 315. The Mark 3 bodyshell was also the basis of Class 318, Class 455, and the diesel "sprinters" pioneered by the Class 150.