Class 450 Desiro

The Class 450 is part of the Desiro family of EMU and are very similar to the Class 350 but works off the former Southern Region 750V DC third rail system (the 350s operate off 25kV AC OHLE). One hundred and twenty seven sets were built for South West Trains replacing life expired "slam door" VEP and CIG stock [1]. Although they can only be used on third-rail routes they do have space for the retro-fitting of a pantograph if needed in the future.

Information
Number built: 508 (127 4-car sets)
Built: 2002-7
Builder: Siemens Transportation
Motor: 4 1TB2016 0GB02 three-phase traction motors (750V DC third rail)
Power: 2, 682 hp (2, 000 kW)
Formation: Driving Motor Standard Open (DMSO)+Trailer Composite Open
(TCO)+Trailer Standard Open (TSO)+
Driving Motor Standard Open (DMSO)

The original fleet is known as the Class 450/0 and can carry two hundred and forty two standard class and twenty four first class passengers, first and some standard class seating is 2+2 with other standard class seating being 2+3.

Twenty eight sets were modified for higher capacity (facilitated by removing first class seats and altering the internal layout) for the Waterloo-Windsor route [2] in 2008-9 as Class 450/5. First class seating was restored to these units as they were replaced by Class 458/5s on the route from 2013 and the 450/5s rejoined the main fleet.



Originally SWT were to receive a mixed fleet of 450/0s and 450/2s which were to be 5-car sets for inner suburban routes however the idea was dropped due to problems with platform lengths. All sets remain in service with South West Trains' successor South Western Railway who took over in the late Summer of 2017 [3].
SWR 450 104 and 560 at Haselmere

SWT 450 027 at Ash

SWT 450 011 at Portsmouth Harbour

SWR 450 548 at Virginia Water

SWR 450 558 at Ash Vale

SWR 450 094 at Guildford

[1] John Balmforth, South West Trains (Ian Allan, 2011) p. 62
[2] Colin J Marsden, DMU and EMU Recognition Guide (Ian Allan, 2013) p. 349
[3] Modern Railways (May 2017) p. 24