Stadler Eurolight

The Stadler Eurolight (known as the Vossloh Eurolight until 2015) is the brand name for a family of 4-axle Bo'Bo' mainline diesel-electric locomotives with sub-20-tonne axleloads for passenger and freight trains produced by Stadler Rail.

Stadler Eurolight
Locomotive 68008 of the Direct Rail Services fleet in the UK
Type and origin
Power typeDiesel
BuilderVossloh España (2010–2015)
Stadler Rail Valencia (2016–)
Specifications
Configuration:
​
 • UICBo'Bo'
Gauge1,435 mm (4 ft 8 1⁄2 in)
Wheel diameter1100 mm
Minimum curve80 m
Length20.32 m
Height4.260 m
Axle load‡ RA7 [1]
Loco weight77.5 t (2/3rd full) 16-cylinder
75.5 t (2/3 full) 12-cylinder
85 tons‡
Fuel capacity4,000 L (880 imp gal; 1,100 US gal) l
5,000 L (1,100 imp gal; 1,300 US gal) ‡
Electric system/sAC/AC transmission with four ABB Bordline CC1500 traction inverters
Engine typeCaterpillar Inc. C175
AlternatorABB WGX560PB6 [2]
Traction motorsFour ABB 4FRA6063 (600 kW)
Head end power500 kW (passenger version)
Loco brakeDisc brake, Electropneumatic, also Dynamic (electrical) 2.1 MW
Performance figures
Maximum speed120 km/h (freight)
140–200 km/h (passenger)
160km/h ‡
Power output2.8 MW @1800 rpm (16-cylinder engine) ‡
2.3 MW @1800 rpm (12-cylinder engine)
Tractive effort300 kN (starting)
317 kN (starting)‡
Sources:[3][4][5] ‡ UKLight.[6]
  • Figures refer to european UIC 505-1 version unless noted

The Eurolight series was announced by Vossloh during 2009, the first examples were completed and commenced testing in the following year. The type has been intentionally developed to support use on secondary lines without limiting power or speed performances, making it suitable for mixed traffic operations. Specific versions of the Eurolight have been developed for the United Kingdom market, and a 6-axle Co'Co' machine for narrow gauge Asian markets, named UKLight and AsiaLight respectively. Furthermore, an electro-diesel locomotive derivative of the UKLight that shares much of its design, referred to as the Stadler Euro Dual, has also been developed and introduced during the late 2010s.

Background and design

In 2009, Vossloh announced its intention to expand its diesel locomotive range to include further shunting/light mainline locomotives with either hydraulic or electric transmissions, and to produce a mainline diesel-electric locomotive (EURO Light) for markets where an axleload below 20 t is required.[7] The four-axle EuroLight was designed to have a low axle load for use on cross-border operations on non-electrified European secondary routes, enabling operators to bypass bottlenecks on main corridors.[8] It is reportedly suited for mixed-traffic operations, and can be outfitted to haul both passenger services and freight consists alike.[9]

The locomotive used numerous components from the 20–22 t axleload Vossloh Euro locomotive series. Differences include the adoption of a C175 engine from Caterpillar Inc. (12- or 16-cylinder of 2.3 or 2.8 MW) and traction equipment supplied by ABB Group.[9] In comparison to the Vossloh Euro, a noticeable reduction in mass was achieved, which has been attributed to the adoption of a lighter engine/alternator set, as well as using lighter weight auxiliary system components.[9] The bogie is the design used in the RENFE Class 334 locomotive,[4] with coil spring primary and secondary suspension.[3] Wherever feasible, elements of the engine and traction system are composed of lighter aluminium rather than steel.[9]

For greater efficiency, the CAT engine has been furnished with electronically-regulated fuel injectors, enabling it to be precisely tuned to match the demands being placed on the engine at that time; factors taken into account include load, speed, engine temperature, ambient air temperature, and fuel temperature. For further fuel savings, automated stop-start technology has been incorporated to shut the engine down at times of inactivity and restart when required or to keep coolant temperatures above a set threshold; this behaviour can be manually overridden by the driver if desired.[9] It is also equipped with turbochargers and after-cooling apparatus. The engine incorporates its own telemetry equipment, separate from the general system used by the locomotive; these systems aid in performance analysis and fault reporting.[9] It is reportedly to be serviceable at trackside locations and requires a major service to be performed at intervals of 18,000 operating hours, reducing the need for the locomotive to return to the operator's depots.[9]

The CAT engine conform to European Stage IIIA emission standards, and can be modified to meet 2012 IIIB emission standards by replacing the exhaust silencer with a diesel particulate filter.[3][4] Implementing such equipment in some regions can be complicated by the need to adhere to restrictive loading gauges, such as that predominantly used in the United Kingdom; accordingly extensive redesigning may be required.[9] Both the engine and traction apparatus are frame mounted to reduce unsprung mass, being typically fitted using a five-point flexible mounting system, the mounting points of which being intentionally isolated.[9]

The ABB traction system uses a 6-pole brushless WGX560 synchronous alternator, which is directly coupled to the CAT engine.[10] The alternator supplies two traction packages (ABB Bordline CC1500 DE Compact Converters.[11] ), each with rectifier to create an intermediate DC supply, braking chopper, and drive electronics (AC800 PEC) with adhesion (anti slip) control controlling two traction inverters and one auxiliary inverter per package. There is one traction inverter per traction motor. The traction motors are rated at 600 kW at 4400 rpm.[5] The drive electronics incorporate features such as fault condition detection and anti-slip control to maximise wheel adhesion to the rails, the latter being augmented by an automated sanding system. Head end power (for passenger versions) is taken from the intermediate DC link; the DC power system which is also used for dynamic braking.[11][9] The braking systems typically used are a combination of rheostatic and disc brakes.[9]

The first EuroLight was unveiled at the InnoTrans trade fair in Berlin in 2010.[12] From the onset, the design was designed to be customisable to customer requirements, allowing for a variants with a higher top speed, increased fuel capacity, or compatibility with limited loading gauges to be produced.[9] Modified versions for broad and narrow gauge railways, and a long distance 7000l fuel capacity version are also said to be buildable.[4] An electro-diesel locomotive derivative, referred to as the Stadler Euro Dual, has also been developed; it shares most of its design, such as the bodyshell, braking systems, bogies, traction equipment and software, with vehicles of the Stadler Eurolight series.[13][9]

Versions

European mainland - EuroLight

During early 2010, a pair of prototypes were constructed, numbered 248.001 and 248.002. That same year, 248.002 was publicly exhibited at Innotrans.[14] Homologation tests with 248.001 in Germany began in January 2011.[14] Performance data gathered from these prototypes was subsequently made available to prospective operators to aid in evaluating the EuroLight's capabilities.[15]

During July 2015, the Italian operator Dinazzano Po ordered a single unit;[16] the locomotive performed its maiden fright service during Apil 2018.[17] On 31 July 2019, it was announced that the Spanish railway infrastructure company ADIF had ordered 22 Eurolight locomotives for rescue purposes;[18] these vehicles are compliance with the European Stage IIIB emissions standards and feature a facelift over earlier production examples.[19]

United Kingdom - UKLight
Main article: British Rail Class 68

On 5 January 2012, Direct Rail Services announced an order for fifteen 160 km/h (99 mph) EuroLight UK locos for intermodal and passenger work with a 2.8 MW (3,800 hp) C175-16 engine to be delivered in 2013, with options for more. Vossloh's product name for the design is UKLIGHT.[20] They will be designed to fit the small loading gauge in the UK, and will be manufactured at Vossloh España's plant in Valencia, Spain, with an expected delivery date of late 2013.[12][21] They are known in the United Kingdom as the class 68.[22] The value of the contract has been estimated at £45 million.[23]

During early 2013, the design and livery of the Direct Rail Services' class 68s was publicly unveiled.[24][25] By May 2013, the first of the locomotives was under construction, at which point testing at Velim test track and delivery to UK for certification was anticipated to occur around September/October 2013;[26] By December 2013, number 68001 had commenced tests at Velim,[27] and 68002 had been completed at Albuixech.[28]

During January 2014, the first locomotive, designated as 68002 Intrepid, was shipped to Southampton and transported to Carlisle;[29] trials commenced one month later, which were initially conducted between Carlisle and Crewe.[30][31] In September 2014, an option for ten further UKLights was confirmed to have been taken up by DRS/BeaconRail.[32] Seven more units were confirmed as ordered in July 2015.[16]

Asia - AsiaLight

A narrow gauge, 1,000 mm (3 ft 3 3⁄8 in) to 1,067 mm (3 ft 6 in), six axle Co'Co' design has also been developed. In a typical configuration, this locomotive weighs around 96 tons and has an engine power output of 1,800 to 2,800 kW (2,400 to 3,800 hp) at 1800 rpm, depending on engine installed (either 12 or 16 cylinder engines, either CAT, Cummins or MTU designs). The top speed is 120 km/h (75 mph) and starting tractive effort 320 kN (72,000 lbf).[20][33]

During October 2019, the Taiwan Railway Administration awarded a €165m order to supply 34 AsiaLight locomotives; the deal was Stadler's first major tender win in the Asia Pacific region.[34]

See also

References
  1. Johnson, Marc (1 April 2014), "Sleek Lines", www.therailengineer.com
  2. "Case Note: Compact traction generator puts the Eurolight locomotive on track" (PDF). www.abb.com.
  3. "EUROLIGHT Mainline Diesel-Electric Locomotive" (PDF), www.vossloh-espana.com, Vossloh España, retrieved 5 January 2012
  4. Kevin Smith (September 2010), "EuroLight punches above its weight: Vossloh will officially unveil its new highly-modular yet lightweight locomotive at InnoTrans. Kevin Smith takes a closer look at EuroLight", International Railway Journal, 50 (9): 73–74 HTML text via findarticles.com
  5. Sources:
  6. UKLIGHT Diesel-Electric Locomotive For passenger and freight applications (PDF), Vossloh Rail Vehicles, archived from the original (PDF) on 29 April 2014
  7. "Vossloh - Position paper 2009" (PDF), www.vossloh.com, Vossloh, p. 17, archived from the original (PDF) on 26 February 2012
  8. "Light and powerful". Railway Gazette International: 34. 1 July 2010. Archived from the original on 25 January 2013. .. EuroLight is intended to meet the potential requirements of cross-border freight and passenger operators. According to the manufacturer, EuroLight will be 'light enough to operate on branch lines but powerful enough to keep up with main line traffic'. Vossloh sees an important market niche for a high-performance four-axle diesel loco for use on routes with UIC Class C or Class D track, which have an axleload limit of less than 20 tonnes
  9. Stacy, Mungo (1 April 2014). "Sleek lines". Rail Engineer.
  10. "Case note : Compact traction generator puts the Eurolight locomotive on track" (PDF), www05.abb.com, ABB Group, 2010
  11. "BORDLINE CC1500 DE Propulsion and auxiliary converter for diesel-electric locomotives (Product Data Sheet)" (PDF), www05.abb.com, ABB Group
  12. "Direct Rail Services orders 15 Vossloh EuroLight UK locomotives". Railway Gazette International. 5 January 2012.
  13. Harris, Nigel, ed. (1 February 2017). "Direct Rail Services' first '88' arrives in UK". Rail Magazine. No. 819. Peterborough: Bauer Media. p. 15. ISSN 0953-4563.
  14. "RAILCOLOR.NET - modern locomotive power - VOSSLOH". www.railcolor.net. Vossloh EuroLight: introduction. Retrieved 5 January 2012.
  15. "EXCLUSIVE: Inside Direct Rail Services". Rail Magazine. 18 January 2018.
  16. Barrow, Keith (28 July 2015), "DRS orders more class 68s from Vossloh", www.railjournal.com
  17. "Stadler's first Eurolight locomotive enters service in Italy". spanishrailwaysnews.com. 3 April 2018.
  18. "Stadler Signs Contract for 22 Locomotives for ADIF". Railway-News. 18 October 2019.
  19. Cech, Lubomir (18 October 2019). "[ES] Stadler releases more details about the 22 rescue locomotives for ADIF". railcolornews.com.
  20. The diesel-electric EUROLIGHT picks up speed toward the UK and Asia, Vossloh, archived from the original on 5 February 2013, retrieved 3 September 2012
  21. "Direct Rail Services confirms Vossloh EuroLight order", www.railjournal.com, International Railway Journal, 5 January 2012, archived from the original on 27 January 2012
  22. "Direct Rail Services reveals Class 68 desig n". Railway Gazette International. 1 February 2013.
  23. Johnson, Marc (1 April 2014), "Sleek lines", www.therailengineer.com
  24. "Direct Rail Services reveals Class 68 design". Railway Gazette International. 1 February 2013.
  25. "Direct Rail Services offers a glimpse of EuroLight UK". International Railway Journal. 1 February 2013.
  26. "Class 68 UKLight locomotives take shape", www.railwaygazette.com, 3 May 2013
  27. Barrow, Keith (13 December 2013), "Vossloh puts DRS class 68s through their paces", www.railjournal.com
  28. "Exclusive: Class 68 in new DRS livery", www.directrailservices.com (Press release), 10 December 2013
  29. "Portrait Vossloh 2680", www.mainlinediesels.net, retrieved 18 February 2014
  30. "Class 68 - a new face on the line", North Wales Coast Railway - Notice Board, 10 February 2014
  31. "Class 68 dynamic trials commence", www.mainlinediesels.net, 5 February 2014
  32. Barrow, Keith (12 September 2014), "DRS orders more Vossloh locomotives", www.railjournal.com
  33. "ASIALight Diesel-Electric Locomotive For passenger and freight applications" (PDF). Vossloh Rail Vehicles.
  34. "Stadler wins Taiwan loco order". Railway Gazette. 15 October 2019.
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