PKP class EN57

Infobox Locomotive
name = EN57
powertype = Electric

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caption = EN57 units (1346, 1062 and 1015) in Poznań
builder = flag|POL Pafawag
serialnumber =
buildmodel =
builddate = 1961-1993
totalproduction = 1412
whytetype =
aarwheels = 2'2'+Bo'Bo'+2'2'
uicclass =
gauge = 1435 mm
leadingsize =
driversize = 940 mm / 1000 mm
trailingsize =
wheelbase =
length = 649700 mm
width =
height =
framesize =
weightondrivers =
weight = 123 t
locotenderweight =
fueltype =
fuelc

tenderc

consumption =
watercons =
electricsystem = 3000 V
collectionmethod = pantograph
primemover =
enginetype = LK450
aspiration =
displacement =
boiler =
boilerpressure =
feedwaterheater =
firearea =
tubearea =
fluearea =
tubesandflues =
fireboxarea =
totalsurface =
superheatertype =
superheaterarea =
cylindercount =
cylindersize =
rearcylindersize =
hpcylindersize =
lpcylindersize =
valvegear =
transmission = 70:19
topspeed = 110 km/h
poweroutput = 608 kW
tractiveeffort =
factorofadhesion =
locobrakes = Knorr
Oerlikon (later versions)
trainbrakes =
railroad = PKP, Yugoslavian Railways, Hrvatske Željeznice, Slovenske železnice
railroadclass = EN57 flag|POL
311/315-0 flag|YUG
6011 flag|CRO
numinclass =
roadnumber =
officialname =
nicknames = Kibel (Poland)
Gomułka (Yugoslavia)
locale =
deliverydate = 1962 (PKP)
1964 (Yugoslavia)
1991 (Croatia)
firstrundate = 1961
lastrundate =
retiredate =
restoredate =
scrapdate =
currentowner =
disposition =|

EN57 is an electric multiple unit used by the Polish railway operator ("PKP"). It was built for suburban and long-distance services. Presently it is used by PKP Przewozy Regionalne, Szybka Kolej Miejska and Koleje Mazowieckie companies.

History

Designed for regional transport class EN57 was based on the earlier class EW55 units. EW55 were the first electrical multiple units built in Poland. They were built by Pafawag works in Wrocław.

Production started in 1962 and ended in 1993 with 1412 units produced, most of which are still in operation. This class is believed to have had the longest production period in the world for electric multiple units.The first units had first class compartments, but units numbered 602 and upwards were produced with only second class. Due to very long production period the series varies between specific production spans. Units up to number 1113 have corrugated sides and three windscreens, units numbered 1114 to 1825 have flat sides and three windscreens, whilst units from number 1900 up to 1953 have flat sides and two winscreens, resembling class EW58 units.

As the result of several fires and accidents, units numbered 201 to 206 are assembled from surviving cars of previously destroyed units. Since 2006, PKP Przewozy Regionalne have modernized several units with funding from the European Union. The changes affect the appearance of the units, with the ends being redesigned. The interior was also changed. Mechanical and electric devices remain mostly unchanged. Modified units are being renumbered from 2001 upwards.

Classes EN71, ED72, and ED73 units were based on class EN57. Szybka Kolej Miejska which operates service in the Tricity area uses these units and has also modernized them, this being mostly to the interior.

Technical data

EN57 is a three car electric multiple unit with traction motors located in the middle car. The unit has four LK450 motors, each with power of 145 kW. The outer two cars are both driving trailers and do not have motors. Trailers are distinguished with letters "a" and "b", with part "a" including compressor and part "b" including the batteries.

Each part of the unit consists of three compartments, divided by corridors. In the trailers only two compartments are for passenger accommodation, while the third was thought to be luggage compartment. In the motor car, all three compartments are used by passengers. Previously, there were toilets in all parts of the unit, yet due to several fires caused by neighbouring electric devices the toilets in the motor cars were removed. Class EN57 is capable of multiple unit operation with two or three units, using Scharfenberger couplers to connect units together. Each unit can seat up to 212 passengers.

ervice in other countries

Examples of class EN57 EMU were exported to Yugoslavia in 1964, where they classified "311-0" (for trailers) and "315-0" (for motor cars). Some units are still in service with the Croatian Railways (6011 series) as well as Slovenian Railways. As in the time of delivery Władysław Gomułka was the leader of Polish Communist Party, those items were nicknamed after him.ref|1

Resource

# [http://kolejarz.lhs.pl/wstep_1.htm Polish electric multiple units technical data] , URL accessed on June 8, 2007
# [http://www.psmkms.krakow.pl/kolej/en57.htm EN57 unofficial website] , URL accessed on June 8, 2007
# [http://www.mundek.krakow.pl/images/world/slowenia/index.html Mundkowa Galeria Kolejowa] , retrieved on June 26, 2007.

ee also

*Polish locomotives designation
*Szybka Kolej Miejska
*14WE A heavily modified version of EN57, developed in mid-2000s