British Rail Class 458 Juniper | |
South West Trains Class 458 Juniper No. 458016 at Reading South West Trains Class 458 Juniper No. 458016 at Reading | |
Manufacturer | Alstom |
---|---|
Built at | Washwood Heath |
Family name | Juniper |
Constructed | 1998 - 2000 |
Entered service | 1999 - |
Number built | 30 trainsets |
Formation | 4 cars per trainset DMCO-PTSO-TSO-DMCO |
Fleet numbers | 458001 - 458030 |
Operator | South West Trains |
Specifications | |
Car length | ? |
Width | ? |
Height | ? |
Maximum speed | 100 mph (Template:Convert/outsep) |
Weight | 164.3t |
Power supply | Third rail |
Electric system(s) | 750V DC |
Braking system(s) | Air, regenerative |
Gauge | {{#switch:sg
|3mm=3 mm (0.118 in) |4mm=4 mm (0.157 in) |4.5mm=4.5 mm (0.177 in) |4.8mm=4.8 mm (0.189 in) |6.5mm=6.5 mm (0.256 in) |6.53mm=6.53 mm (0.257 in) |8mm=8 mm (0.315 in) |8.97mm=8.97 mm (0.353 in) |9mm=9 mm (0.354 in) |9.42mm=9.42 mm (0.371 in) |10.5mm=10.5 mm (0.413 in) |11.94mm=11.94 mm (0.470 in) |12mm=12 mm (0.472 in) |12.7mm=12.7 mm (0.5 in) |13mm=13 mm (0.512 in) |13.5mm=13.5 mm (0.531 in) |14mm=14 mm (0.551 in) |14.125mm=14.125 mm (0.556 in) |14.2mm=14.2 mm (0.559 in) |14.28mm=14.28 mm (0.562 in) |14.3mm=14.3 mm (0.563 in)|15.76mm=15.76 mm (0.620 in) |
The South West Trains Class 458 (or 4JOP) electrical multiple units were built by Alstom at Washwood Heath between 1998 and 2000. These units are part of Alstom's Juniper family of units, which also includes Classes 334 and 460.
Description[]
Thirty of these 4-car trains were ordered by South West Trains (SWT) in 1998, to create extra capacity and to replace some of the aging Class 411 (4CEP) units, which at the time were on short-term lease[citation needed]. Deliveries of these units commenced in 1998.[1] Units were delivered in SWT's mainline livery of mainly white, with a blue band, and red/orange 'swish' at cab ends.
The class suffered from major technical problems[citation needed], so none of the older Class 411 units were withdrawn from service. It was six more years, in 2004, before the full fleet was in service[citation needed]. In 2004, reliability was so poor that despite the units being only six years old, it was planned to return them to the leasing company and replace them with new Class 450 Desiro trains.[2] At that time, the Class 458 Juniper trains only managed an average of Template:Convert/mi between failures, compared with an average of Template:Convert/mi for a Class 450 Desiro and Template:Convert/mi for the previous slam-door trains.[2]
Since then reliability has improved sufficiently to allow them to be retained. As of 11 December 2005, timetable change, the trains were significantly lowered in diagrams and were only found on three diagrams on weekdays out of London Waterloo.[citation needed] In September 2005, two units (458001 and 458002) were transferred to Gatwick Express.[3][4] The units recommenced service in 2007 on outer suburban lines, complementing the Class 450 Desiro fleet. The two trains previously allocated to Gatwick Express have now been transferred back to South West Trains.[4]
30 units were built, numbered 458001-030. Each unit was formed from two outer driving motors, an intermediate trailer, and an intermediate motor. The trailer has the capacity to be fitted with a pantograph, thus allowing the units to be rebuilt in the future for overhead power collection at 25 kV AC, should the need arise.[citation needed] The technical description of the formation is DMCO+PTSO+MSO+DMCO. Individual vehicles are numbered as follows:
- 67601-67630 - DMCO
- 74001-74030 - PTSO
- 74101-74130 - MSO
- 67701-67730 - DMCO
The interior of Standard Class accommodation aboard a Class 458
Operations[]
When first built, the units were used on the half-hourly London Waterloo to Alton trains.[citation needed] Occasionally, they were found operating the Basingstoke semi-fast service and other general outer-suburban duties.[citation needed] The units were then transferred to the half-hourly London Waterloo to Reading service, mainly so that they were confined to one area of the network. The trains now solely reside on this line, however, sometimes operate services between Ascot and Guildford (during peak hours).[citation needed]
Occasionally the units have been noted to operate the Weybridge to London Waterloo via Hounslow services[citation needed] along with the more prominent Class 450 Desiro trains on the line. This operation has been less frequent recently due to fewer available 'spare' class 458 units during daytime periods with the refreshment scheme and the (now finished) 'regen' brake testing programme.[citation needed]
Refresh and testing[]
The interior of an original First Class cabin aboard a Class 458
The interior of a refurbished First Class cabin aboard a Class 458
Bournemouth Train Care Depot has recently 'refreshed' these EMUs. The 'refresh' includes adding CCTV, new seats and tables in first class, an internal repaint, and Rail Vehicle Accessibility Regulations (RVAR) compliant lavatory, information display panels and door lights.[1]
All Class 458 trains have been refreshed. In 18 months time, a refresh of Standard Class accommodation will take place alongside an exterior relivery [5].
Unit 458027 has been modified for testing of the regenerative brake facility and this has been carried out in the Weymouth area overnight recently[citation needed]. At least one other 458 was present each night to act both, as a standby and as a load unit. The testing programme was due to be completed in the first week of December (08) after which it is anticipated that application will be made to make the regenerative brake functional on at least two units for a trial period.[citation needed]
Two of the Class 458 fleet are now starting to test the technology in passenger service on the London Waterloo-Guildford and London Waterloo-Reading routes. The whole fleet of 30 Class 458 trains is expected to be fitted with the new regenerative braking software by the end of May 2010.
Future lengthening[]
Under the government's Rolling Stock Plan, SWT are due to receive up to 140 additional vehicles. Porterbrook, the owner of the Class 458 fleet, has proposed that part of this could be met through lengthening the 4-car Junipers to 5-cars using the mechanically similar Class 460 units currently employed on the Gatwick Express. 24 Class 458s would be lengthened using vehicles from the Class 460s, while the remaining Class 460 vehicles would be reformed into six new 5-car sets, leaving an additional vehicles for use as spare parts.[6]
Fleet details[]
Class | Operator | No. Built | Year Built | Cars per Set | Unit nos. |
---|---|---|---|---|---|
Class 458 | South West Trains | 30 | 1998–2000 | 4 | 458001 - 458030 |
External links[]
References[]
- ↑ 1.0 1.1 The Fall and Rise of South West Trains' 458 Units - Southern Electric Group. Retrieved 2010-12-26.
- ↑ 2.0 2.1 Template:Cite news
- ↑ Gatwick Express 458s - Southern Electric Group. Retrieved 2010-12-26.
- ↑ 4.0 4.1 The Fall and Rise of South West Trains' 458 Units (458001 - 458004 Page). - Southern Electric Group. Retrieved 2010-12-26.
- ↑ http://www.southwesttrains.co.uk/SWTrains/Customerservice/LC/[dead link]
- ↑ "Porterbrook plans third-rail EMU cascade" (2010). Modern Railways 67 (737): 72–73.
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