British Rail Class 507

British Rail Class 507
Merseyrail Class 507 at Bidston in 2023
The interior of a refurbished Class 507 unit
In service	1 November 1978 – present
Manufacturer	British Rail Engineering Limited
Order no.	30906 (BDMSO vehicles) 30907 (TSO vehicles) 30908 (DMSO vehicles)[1]
Built at	Holgate Road Works, York
Family name	BREL 1972
Replaced	Class 502 Class 503
Constructed	1978–1980[1]
Refurbishment	2002–2005 at Alstom Eastleigh
Scrapped	2023-present
Number built	33
Number in service	9
Number scrapped	24
Successor	Class 777
Formation	3 cars per unit: BDMSO-TSO-DMSO[1]
Diagram	BDMSO vehicles: EI202 TSO vehicles: EH205 DMSO vehicles: EA201[1]
Fleet numbers	507001–507033[1]
Capacity	As built: 234 seats As modified: 222 seats As refurbished: 192 seats
Operator(s)	Merseyrail
Depot(s)	Current: Birkenhead North (Wirral) Kirkdale (Liverpool) Former: Hall Road (Blundellsands)[1][2]
Line(s) served	Northern Line Wirral Line
Specifications
Car body construction	Steel underframe and body frame, aluminium body and roof
Car length	DM vehs.: 19.800 m (64 ft 11.5 in) Trailers: 19.920 m (65 ft 4.3 in)
Width	2.820 m (9 ft 3.0 in)
Height	3.582 m (11 ft 9.0 in)
Floor height	1.146 m (3 ft 9.1 in)
Doors	Double-leaf pocket sliding, each 1.288 m (4 ft 2.7 in) wide (2 per side per car)
Wheelbase	Over bogie centres: 14.170 m (46 ft 5.9 in)
Maximum speed	75 mph (120 km/h)
Weight	BDMSO vehs.: 37.06 t (36.47 LT; 40.85 ST) TSO vehs.: 25.60 t (25.20 LT; 28.22 ST) DMSO vehs.: 35.62 t (35.06 LT; 39.26 ST)[1]
Traction motors	8 × GEC G310AZ (82 kW (110 hp) each, 4 per motor car)
Power output	656 kW (880 hp)
Train heating	Electric heating (ducted warm air)
Electric system(s)	600–750 V DC third rail[1]
Current collection method	Contact shoe
UIC classification	Bo′Bo′+2′2′+Bo′Bo′
Bogies	BREL BX1[1]
Minimum turning radius	70.4 m (231 ft 0 in)
Braking system(s)	Electro-pneumatic (disc) and rheostatic[1]
Safety system(s)	AWS TPWS
Coupling system	Tightlock
Multiple working	Within class, and with Class 508
Track gauge	1,435 mm (4 ft 8 1⁄2 in) standard gauge
Notes
Specifications as at August 1982[3] except where otherwise noted.

British Rail Class 507 electric multiple units were built by BREL at York works from 1978 to 1979. They were the third variety of British Rail's then-standard 1972 design for suburban EMUs, which eventually encompassed 755 vehicles and five Classes (Class 313/314/315/507/508). The 507s were the first variant to be 750V DC third rail only. They have worked on the Merseyrail network from new, and continue to do so, now refurbished by Alstom's Eastleigh Works.

1. ↑ ^{1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09} Fox, Peter (1994). British Railways Pocket Book No. 4: Electric Multiple Units (7th ed.). Sheffield: Platform 5 Publishing. pp. 85–86. ISBN 978-1-872524-60-3. OCLC 655645349.
2. ↑ Marsden, C. J. (2008). The DC Electrics. Hersham: Ian Allan Publishing. p. 137. ISBN 978-0-86093-615-2. OCLC 318668763.
3. ↑ Vehicle Diagram Book No. 210 for Electric Multiple Units (including A.P.T.) (PDF). Derby: Mechanical & Electrical Engineering Department, British Railways Board. August 1982. EA201, EH205, EI202 (in work pp. 10–11, 272–273, 388–389). Archived from the original (PDF) on 21 January 2015. Retrieved 25 April 2023 – via Barrowmore MRG.