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The SBB Eem 923 is a dual power version of the SBB Ee 922 electric shunting locomotive which was introduced into service with the Swiss Federal Railways (SBB) in 2012.
SBB had various shunting locomotives in use of which many had reached the end of their operational service life around 2010. As a result maintenance became expensive and combined with this was that, from an ecological perspective, these locomotives were no longer viable. Due to this SBB Cargo decided to order new dual power electro-diesel locomotives which could be used on the entire SBB network as the dual power design allowed them to operate efficiently on both the electrified rails and the short unelectrified sidings.
Because of the adoption of the Eem 923 SBB expects it can achieve a reduction in CO2 emissions of more than 4000 tonnes per annum compared with the current locomotives. [2]
SBB procured 30 machines in 2010 from Stadler Winterthur AG with an overall value of CHF 88 million. The first machine was delivered in March 2012 and deliveries continued until the end of 2013. [2] [3]
The locomotives utilize a Bo wheel arrangement and are capable of traveling at speeds up to 120 km/h while operating on 15 kV AC or 25 kV AC electrified lines. While operating on electrified lines the locomotives are capable of producing a power output of 1,500 kW (2,012 hp). [4]
When operating on non-electrified sidings, the locomotives are powered by a diesel engine-generator set which produced 290 kW (389 hp) at the wheel. [4] [5]
The design of the Eem 923 is derived from the Ee 922, an electrically powered two-axle locomotive also used by the SBB and produced by Stadler. [6]
An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or on-board energy storage such as a battery or a supercapacitor. Locomotives with on-board fuelled prime movers, such as diesel engines or gas turbines, are classed as diesel–electric or gas turbine–electric and not as electric locomotives, because the electric generator/motor combination serves only as a power transmission system.
The British Rail Class 73 is a British electro-diesel locomotive. This type is unusual in that it can operate on the Southern Region's 650 / 750 V DC third rail power supply, or an onboard diesel engine to allow it to be used on non-electrified routes. This makes it very versatile, although the diesel engine produces less power than is available from the third-rail power supply, so the locomotives are rarely used outside of the former Southern Region of British Rail. It is one of the first bi-mode locomotives ever built. Following the withdrawal and scrapping of the more powerful Class 74 bi-mode locomotives in 1977, the Class 73 was unique on the British railway network until the introduction of the Class 88 bi-mode locomotives in 2017. Ten locomotives have been scrapped.
An electro-diesel locomotive is a type of locomotive that can be powered either from an electricity supply or by using the onboard diesel engine. For the most part, these locomotives are built to serve regional, niche markets with a very specific purpose.
Prima is a family of railway diesel and electric locomotives built by Alstom. Manufacture of the type commenced in the late 1990s. By 2008, Alstom had reportedly sold 1,750 Prima locomotives. The second generation Prima II was launched in 2009. The Prima H3 diesel/battery hybrid locomotive was launched in 2013.
The British Rail Class 74 was an electro-diesel locomotive that operated on the Southern Region of British Railways, rebuilt from redundant Class 71 locomotives in the late 1960s. An electro-diesel locomotive is one that can operate either from an electrical supply, such as overhead catenary or an energised third rail, or from an onboard diesel engine. All were withdrawn between June 1976 and December 1977, and scrapped between 1977 and 1981.
Tinsley was a railway marshalling yard near Tinsley in Sheffield, England, used to separate railway wagons from incoming trains and add them to new trains. It was sited immediately west of the M1 motorway, about one mile north of the Catcliffe junction. It was opened in 1965, as a part of a major plan to rationalise all aspects of the rail services in the Sheffield area; it closed in stages from 1985, with the run-down of rail freight in Britain. It was also the site of Tinsley Traction Maintenance Depot (TMD), which was closed in 1998; at its peak, 200 locomotives were allocated to this depot.
Alstom Traxx is a modular product platform of mainline diesel-electric and electric locomotives. It was produced originally by Bombardier Transportation and later Alstom, and was built in both freight and passenger variants. The first version was a dual-voltage AC locomotive built for German railways from the year 2000. Later types included DC versions, as well as quadruple-voltage machines, able to operate on all four electrification schemes commonly used in Europe. The family was expanded in 2006 to include diesel-powered versions. Elements common to all variants include steel bodyshells, two bogies with two powered axles each, three-phase asynchronous induction motors, cooling exhausts on the roof edges, and wheel disc brakes.
Stadler Rail AG is a Swiss manufacturer of railway rolling stock, with an original emphasis on regional train multiple units and trams, but moving also into underground, high speed, intercity and sleeper trains. It also produces niche products, such as being one of the last European manufacturers of rack railway rolling stock. Stadler Rail is headquartered at its place of origin in Bussnang, Switzerland. Stadler Rail employed 13,900 employees by 2023.
SBB Cargo is a subsidiary of Swiss Federal Railways (SBB) specialising in railfreight and is operated as the Freight division. Swiss Federal Railways is a former state-owned and -controlled company that was transformed in 1999 into a joint-stock company under special legislation following the first Swiss railway reform and divided up into three independent divisions: Passenger, Freight and Infrastructure. The headquarters of Swiss Federal Railways SBB Cargo AG, the Freight division's official designation, are in Olten. In 2013, SBB Cargo had 3,061 employees and achieved consolidated sales of CHF 953 million. In Switzerland, SBB Cargo is the market leader in rail freight, transporting over 175,000 tons of goods every day. This corresponds to the weight of 425 fully loaded jumbo jets.
The SNCF Class BB 60000 are a class of 4 axle heavy shunting and light freight diesel–electric locomotives built at the Vossloh España works in Valencia. Since the class is primarily used as a freight locomotive the class is commonly referred to as SNCF BB 460000.
The British Rail Class 88 is a type of mainline mixed traffic electro-diesel locomotive manufactured by Vossloh España/Stadler Rail Valencia for Direct Rail Services (DRS) in the United Kingdom. The locomotive is part of the Stadler Euro Dual family. It is the first dual-mode locomotive in the UK to use the 25 kV AC electrification.
The Bombardier ALP-45DP is a type of single cab dual-mode locomotive operated by New Jersey Transit and Exo. The locomotive was designed and originally built by Bombardier until 2021, and by Alstom since 2021.
The Am 6/6, later known as Am 861, is a class of diesel shunting locomotive which were built for the Swiss Federal Railways (SBB) and were intended for use as heavy hump shunters at the Limmattal classification yard.
The Vectron is a locomotive series made by Siemens Mobility, introduced at the 2010 InnoTrans trade fair in four prototype versions: diesel, multi-system, and both AC and DC electric power. The diesel version has been replaced in 2018 by a dual mode locomotive which is powered by electricity on electrified sections of the track and can be switched to diesel mode on non-electrified sections. The Vectron series is reconfigurable and modular, with a Bo'Bo' wheel arrangement, and is intended as the successor to the EuroSprinter family of locomotives. It can be configured to use any or all of the four electric power systems commonly used in Europe. A more affordable, basic version called Smartron was introduced in 2018.
The Spoornet Class 38-000 of 1992 is a South African electro-diesel locomotive.
The Stadler EuroDual is a series of dual power, electro-diesel locomotive by Stadler Rail Valencia. Unlike traditional dual mode locomotives, fitted with relatively low-powered diesel engines for 'last mile' movements only, vehicles are typically furnished with power units more comparable to that of mainline diesel locomotives.
An electro-diesel multiple unit (EDMU) or bi-mode multiple unit (BMU) is a form of a multiple unit train that can be powered either by electric power picked up from the overhead lines or third rail or by using an onboard diesel engine, driving an electric generator, which produces alternating current (AC) or direct current (DC) electric power.
The British Rail Class 93 is a tri-mode locomotive built by Stadler Rail in Valencia. It is an evolution of the Class 88 bi-mode locomotive, which was built by Stadler for Direct Rail Services. Three different power sources are used to power the locomotive – 4,000 kW (5,400 hp) 25 kV AC overhead electric power, or a 900 kW (1,200 hp) diesel engine supplemented by a 400 kW (540 hp) battery – allowing the locomotive to be used on both electrified and non-electrified lines.
The British Rail Class 99 is a class of dual-mode electro-diesel Co-Co locomotives that will haul freight trains on both electrified and non-electrified lines. It is based on the Stadler Euro Dual platform.
The 257 Series is a meter gauge freight electro-diesel locomotive based on Stadler Rail's Euro Dual series. It is operated by Ferrocarrils de la Generalitat de Catalunya (FGC) in the Llobregat-Anoia line.
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