PKP class EP07 is a class of standard-gauge

electric locomotive 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 ...

s used primarily for passenger trains in

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populous ...

. They are rebuilt EU07 class locomotives, which in turn are the direct successors to the post-war British EU06 series locomotives. The only operators of this locomotive series are

PKP Intercity PKP Intercity is a company of PKP Group responsible for long-distance passenger transport. It runs about 350 trains daily, connecting mainly large agglomerations and smaller towns in Poland. The company also provides most international trains to ...

and

Polregio Polregio (formerly ''Przewozy Regionalne'') is a train operator in Poland, responsible for local and interregional passenger transportation. Each day it runs approximately 3,000 regional trains. In 2002 it carried 215 million passengers. The ...

. These locomotives constitute the vast majority of electric locomotives still serving the

PKP Group PKP Group ( pl, Grupa PKP) is a Polish corporate group founded in 2001 from the former state enterprise, Polish State Railways. The purpose of this change was to separate infrastructure management and transport operations. It consists of the follo ...

today - they are used to drive both light and heavy passenger trains.

History

Since 1995, some EU07 locomotives have undergone a reconstruction, in which new

traction motor A traction motor is an electric motor used for propulsion of a vehicle, such as locomotives, electric vehicle, electric or hydrogen vehicles, elevators or electric multiple unit. Traction motors are used in electrically powered rail vehicles (ele ...

s with a higher permissible operating temperature - LKb535 were installed and the

gear-ratio A gear train is a mechanical system formed by mounting gears on a frame so the teeth of the gears engage. Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission ...

was changed from 79:18 to 76:21. Modifications were carried out, among others..: ZNTK Oleśnica, ZNTK Mińsk Mazowiecki,

HCP Poznań HCP may refer to: Businesses * HashiCorp (NASDAQ: HCP), an American software company * Healthpeak Properties (formerly HCP, Inc.), an American investment company * H. Cegielski – Poznań, a Polish manufacturing company * Health Consumer Power ...

, "Newag" Nowy Sącz. The change of gear ratio did not, however, increase the

design speed The design speed is a tool used to determine geometric features of a new road or street during road design. Contrary to the word's implication, the design speed of the road or street is not necessarily its vehicle speed limit or maximum safe sp ...

(misaligned transmission system - hollow shaft bearing on slide bearings), but decreased the engine speed, making it difficult to drive freight trains with this locomotive. It has become easier to maintain the maximum speed of the locomotive while reducing breakdowns. Starting acceleration has also increased - especially at higher speeds, which is realized with less weakening of the excitation (and thus higher motor power). The new LKb535 traction motors, instead of EE541, are adapted to the higher permissible operating temperature. The maximum permitted engine speed for EE541b is 2390 rpm, for EU07 series locomotives with maximum axle rims and 120 km/h, traction engines reach 2380 rpm and EP07 engines in the same situation only reach 1962 rpm, which increases their durability. The rebuilt units kept their rolling stock number (e.g. the EU07-330 locomotive became the EP07-330 locomotive). In December 2006, 74 EP07 and EU07 class locomotives belonging to

PKP Cargo PKP Cargo () is a logistics operator and a part of the PKP Group in Poland. It is the largest railway freight carrier in Poland and second largest in the European Union. PKP Cargo is listed on the Warsaw Stock Exchange. The company's largest share ...

were sold to

PKP Przewozy Regionalne Polregio (formerly ''Przewozy Regionalne'') is a train operator in Poland, responsible for local and interregional passenger transportation. Each day it runs approximately 3,000 regional trains. In 2002 it carried 215 million passengers. The ...

. These locomotives have been modernized, the main transmission in EU07 has been changed. In addition, they received new livery, control sockets were dismantled, driver's cabs received thermal and acoustic insulation and new driver's and assistant's seats, and electric wipers and halogen headlights were installed. The locomotives have been renumbered from 1001 upwards. In the years 2012-2013 5 EU07 of

Przewozy Regionalne Polregio (formerly ''Przewozy Regionalne'') is a train operator in Poland, responsible for local and interregional passenger transportation. Each day it runs approximately 3,000 regional trains. In 2002 it carried 215 million passengers. The ...

was rebuilt to EP07P type, they received a new numbering from 2001 onwards. The modernization included installation of static converter, WN and NN cabinets, new panels in driver's cabins, air conditioning and repair of traction motors. On the front a diode display was installed.

Nickname

*Siódemka (''The Seven'') - from the number

References

External links

PKP IC EP07 @ TrainspoModern Locos GalleryRail ServiceMikolejeChabówka Rail Museum
Pafawag locomotives Bo′Bo′ locomotives 3000 V DC locomotives Polish State Railways electric locomotives Standard gauge locomotives of Poland {{poland-rail-transport-stub

History

Nickname

See also

References

External links