SNCF Class BB 25500

Infobox Locomotive Auto
name = Class BB 25500
powertype = Electric

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imagesize = 250
caption = SNCF BB 25610 at Paris Montparnasse Station, (2005-02-21)
builder = Alsthom
serialnumber =
buildmodel =
builddate = 1964-1976
totalproduction = 194
whytetype =
aarwheels =
uicclass = B'B'
gauge = RailGauge|sg
leadingsize =
driversize = 1100 mm
trailingsize =
wheelbase =
length = 14.70 m (25501-25544) 14.94 m (25545-25587) 15.57 m (25588-25694)
width =
height =
framesize =
weightondrivers =
weight = 79 t (25501-25544) 80 t (25545-25555) 77 t (25556-25587) 77 t (25588-25694)
locotenderweight =
fueltype =
fuelc

tenderc

consumption =
watercons =
electricsystem = 1.5 kV DC
25 kV 50 Hz AC
collectionmethod = pant
primemover =
enginetype =
aspiration =
displacement =
transmission = 2×TAB 660B1 monomotors
topspeed = 100 or 140 km/h
poweroutput = 2,940 kW
tractiveeffort = 330 kN or 197 kN
factorofadhesion =
locobrakes =
trainbrakes =
nicknames = |Locomotive Service History Auto
railroad = SNCF TER


imagesize = 250
caption =
railroadclass = BB 25500
numinclass = 102cite web |url=http://www.railfaneurope.net/list/france/france_sncf_ter.html |title=SNCF TER electric locomotives |accessdate=2008-02-03 |author=Marco van Uden]
roadnumber =
officialname =
nicknames =
locale = TER Bourgogne, Bretagne, Franche-Comté, PACA, Rhône-Alpes
deliverydate =
firstrundate =
lastrundate =
retiredate =
restoredate =
scrapdate =
currentowner =
disposition = Locomotive Service History Auto
railroad = SNCF Transilien


imagesize =
caption =
railroadclass = BB 25500
numinclass = 8cite web |url=http://www.railfaneurope.net/list/france/france_sncf_idf.html |title=SNCF Île de France electric locomotives |accessdate=2008-02-03 |author=Marco van Uden]
roadnumber =
officialname =
nicknames =
locale = Paris Montparnasse - Dreux/Mantes la Jolie
deliverydate =
firstrundate =
lastrundate =
retiredate =
restoredate =
scrapdate =
currentowner =
disposition =

SNCF's BB 25500 class are part of a series of electric locomotives built by Alsthom. They are the dual system version of the BB 17000 (AC) and BB 8500 (DC) locomotives (17000+8500=25000). The are fitted with monomotor bogies 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.cite book
last = Haydock | first = David | coauthors = Fox, Peter | title = European Handbook No. 4 French Railways Locomotives & Multiple Units | origyear = 1999 | edition = Third Edition | publisher = Platform 5 Publishing Ltd. | location = Sheffield, UK | isbn = 1 872524 87 7]

They were built a three distinct batches leading to detail differences. They remain in use as mixed traffic locomotives, mostly with TER and Transilien.

References