British Rail Class 307

British Rail Class 307
British Rail Class 307
	Class 307 at Wakefield Westgate in 1991
	Inside a refurbished unit
In service	1956–1993
Manufacturer	British Rail
Order nos.	30203 (MBS); 30204 (TCsoL, later TSOL); 30205 (DTS, later DTBS then BDTBSO); 30206 (DTSOL, later DTCOL);
Built at	Ashford Works; Eastleigh Works;
Constructed	1954–1956
Entered service	1956
Refurbished	1960–1961 (AC conversion); 1983–1984;
Number built	32
Successor	Class 321
Formation	4 cars per unit:; DTSO+MBS+TC+DTS (as built); DTBS+MS+TC+DTS (AC conversion); DTBS+MS+TS+DTC (refurbishment);
Diagram	EC204 (MS); EE307 (DTC); EH222 (TS); EO202 (BDBS);
Design code	AM7
Fleet numbers	307101-307132 (sets); 75001-75032 (DTSO); 61001-61032 (MBS); 70001-70032 (TC); 75101-75132 (DTS);
Capacity	19F/344S (as built); 80S (DTSO); 96S (MBS); 19F/60S (TC); 108S (DTS);
Operator	British Rail
Depots	Ilford; Neville Hill;
Specifications
Car body construction	Steel
Train length	265 ft 8+1⁄2 in (80.988 m)
Car length	63 ft 11+1⁄2 in (19.495 m) (Over body, DTSO, DTS); 63 ft 6 in (19.355 m) (Over body, MBS, TC);
Width	9 ft 3 in (2.824 m)
Height	13 ft 0+1⁄2 in (3.975 m)
Doors	Slam
Articulated sections	4
Wheelbase	46 ft 6 in (14.173 m)
Maximum speed	75 mph (121 km/h)
Weight	154.5 t (152.1 long tons; 170.3 short tons) (total); 43 t (42 long tons; 47 short tons) (DTBS); 47.5 t (46.7 long tons; 52.4 short tons) (MS); 31 t (31 long tons; 34 short tons) (TS); 33 t (32 long tons; 36 short tons) (DTC);
Traction motors	4 × GEC WT344 of 170 hp (130 kW)
Power output	700 hp (520 kW)
HVAC	Electric
Electric systems	25 kV AC OHLE; (Originally 1500 V DC OHLE then 6.25 kV AC OHLE and 25 kV AC OHLE);
Current collection	Pantograph
UIC classification	2′2′+Bo′Bo′+2′2′+2′2′
Bogies	Gresley ED7 (as built, MS); Gresley ET7 (as built, others); B4 (TSO, DTCO); B5 (BDTBSO);
Braking system	Air (Auto/EP)
Safety system	AWS
Coupling system	Buckeye
Multiple working	Within ER fleet
Track gauge	1,435 mm (4 ft 8+1⁄2 in) Standard gauge
Notes/references
	42 × DTs converted 1994–96 to PCV for RES

The British Rail Class 307 electric multiple units were built by BR at Eastleigh Works from 1954 to 1956. They were initially classified as AM7 before the introduction of TOPS.