SNCF Class BB 25500
Encyclopedia
SNCF
's BB 25500 class are part of a series of electric locomotive
s built by Alstom
. They are the dual system
version of the BB 17000
(AC
) and BB 8500
(DC
) locomotives (17000+8500=25500). They are fitted with monomotor bogie
s with two different gear ratios. This allows them to have increased tractive effort in exchange for a reduction in top speed. This makes them suitable for both freight
and passenger trains.
They were built in three distinct batches leading to detail differences. They remain in use as mixed traffic locomotives, mostly with TER and Transilien.
- (Summer)
The locomotives have been renumbered by adding 400,000 to their SNCF numbers.
SNCF
The SNCF , is France's national state-owned railway company. SNCF operates the country's national rail services, including the TGV, France's high-speed rail network...
's BB 25500 class are part of a series of electric locomotive
Electric locomotive
An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or an on-board energy storage device...
s built by Alstom
Alstom
Alstom is a large multinational conglomerate which holds interests in the power generation and transport markets. According to the company website, in the years 2010-2011 Alstom had annual sales of over €20.9 billion, and employed more than 85,000 people in 70 countries. Alstom's headquarters are...
. They are the dual system
Railway electrification system
A railway electrification system supplies electrical energy to railway locomotives and multiple units as well as trams so that they can operate without having an on-board prime mover. There are several different electrification systems in use throughout the world...
version of the BB 17000
SNCF Class BB 17000
The SNCF Class BB 17000 B-B AC electric locomotives built between 1965 and 1968. It performs suburban duties on railway lines around Paris, notably VB2N carriages. They are monophase locomotives and have the nickname "danseuses" or "dancers"...
(AC
Alternating current
In alternating current the movement of electric charge periodically reverses direction. In direct current , the flow of electric charge is only in one direction....
) and BB 8500
SNCF Class BB 8500
The SNCF Class BB 8500 class are part of a series of electric locomotives built by Alsthom for SNCF. They are the direct current version of the 25kV alternating current SNCF BB 17000 and dual system SNCF BB 25500....
(DC
Direct current
Direct current is the unidirectional flow of electric charge. Direct current is produced by such sources as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type. Direct current may flow in a conductor such as a wire, but can also flow through...
) locomotives (17000+8500=25500). They are fitted with monomotor bogie
Bogie
A bogie is a wheeled wagon or trolley. In mechanics terms, a bogie is a chassis or framework carrying wheels, attached to a vehicle. It can be fixed in place, as on a cargo truck, mounted on a swivel, as on a railway carriage/car or locomotive, or sprung as in the suspension of a caterpillar...
s with two different gear ratios. This allows them to have increased tractive effort in exchange for a reduction in top speed. This makes them suitable for both freight
Freight train
A freight train or goods train is a group of freight cars or goods wagons hauled by one or more locomotives on a railway, ultimately transporting cargo between two points as part of the logistics chain...
and passenger trains.
They were built in three distinct batches leading to detail differences. They remain in use as mixed traffic locomotives, mostly with TER and Transilien.
Romania
Locomotives 25517, 25518, 25523, 25528, 25572 & 25576 have been exported to Romania. They work with former SNCF Rio carriages for Regiotrans. Services worked are: - BucharestBucharest
Bucharest is the capital municipality, cultural, industrial, and financial centre of Romania. It is the largest city in Romania, located in the southeast of the country, at , and lies on the banks of the Dâmbovița River....
- (Summer)
- Brasov - Bucharest - CraiovaCraiovaCraiova , Romania's 6th largest city and capital of Dolj County, is situated near the east bank of the river Jiu in central Oltenia. It is a longstanding political center, and is located at approximately equal distances from the Southern Carpathians and the River Danube . Craiova is the chief...
(Winter) - Brasov - Alba IuliaAlba IuliaAlba Iulia is a city in Alba County, Transylvania, Romania with a population of 66,747, located on the Mureş River. Since the High Middle Ages, the city has been the seat of Transylvania's Roman Catholic diocese. Between 1541 and 1690 it was the capital of the Principality of Transylvania...
- Alba Iulia - AradArad, RomaniaArad is the capital city of Arad County, in western Romania, in the Crişana region, on the river Mureş.An important industrial center and transportation hub, Arad is also the seat of a Romanian Orthodox archbishop and features two universities, a Romanian Orthodox theological seminary, a training...
- Alba Iulia - CugirCugirCugir is a town in Alba county, the central settlement of the Breadfield, in Romania. About 45 kilometers south-west of Alba-Iulia, the capital of the county, and 300 meters above sea level at the base of the Surianu Mountains...
- Arad -
The locomotives have been renumbered by adding 400,000 to their SNCF numbers.