British Rail Class 484
The British Rail Class 484 D-Train is a class of electric multiple unit built by rolling stock manufacturer Vivarail which operates on the Island Line on the Isle of Wight. Based on the British Rail Class 230 diesel multiple unit, the units are part of the Vivarail D-Train family, converted from London Underground D78 Stock originally manufactured in the late 1970s and early 1980s by Metro-Cammell.
| British Rail Class 484 D-Train | |
|---|---|
Island Line Class 484 at Shanklin | |
Class 484 passenger saloon | |
| In service | 1 November 2021 – present |
| Manufacturer |
|
| Family name | D-Train |
| Replaced | Class 483 |
| Constructed | 2020–2021 |
| Number built | 5 |
| Number in service | 5 |
| Formation | 2 cars per unit |
| Fleet numbers | 484001–484005 |
| Operators | Island Line |
| Depots | Ryde |
| Lines served | Island Line, Isle of Wight |
| Specifications | |
| Car body construction | Aluminium |
| Car length | 18.372 m (60 ft 3 in) |
| Width | 2.840 m (9 ft 4 in) |
| Height | 3.630 m (11 ft 11 in) |
| Doors | Single-leaf sliding pocket (each 1.127 m (3 ft 8 in) wide) |
| Wheel diameter | 790–710 mm (31.10–27.95 in) (new–worn) |
| Wheelbase |
|
| Maximum speed |
|
| Traction motors | 8 × Traktionssysteme Austria TME 32-43-4 56 kW (75 hp) |
| Power output | 448 kW (601 hp) |
| Electric system(s) | 750 V DC third rail |
| Current collector(s) | Contact shoe |
| UIC classification | Bo′Bo′+Bo′Bo′ |
| Bogies | Bombardier |
| Braking system(s) | Electro-pneumatic |
| Coupling system | Wedglock |
| Multiple working | Within class |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
Five units have been converted for the Island Line to replace the Class 483 sets, with the first delivered for testing in late 2020 and the second in May 2021. The line closed in January 2021 for upgrade works and was originally scheduled to reopen on 1 April 2021 with the new fleet of trains, but delays to the required infrastructure work as a result of the COVID-19 pandemic extended the shutdown period by six weeks to 13 May 2021, and then problems with software on the trains further delayed their introduction. The line reopened to passengers using the Class 484 stock on 1 November 2021.