PKP class EU07

EU07 (manufacturer's designation: Pafawag 4E and HCP 303E[1]) is the name for a Polish electric locomotive in service of the Polish railway operator PKP. This locomotive was designed as a mixed traffic locomotive, and as such is used both in freight and passenger traffic.

EU07
Electric locomotive EU07-364 of PKP Intercity in Warsaw
Type and origin
Power typeElectric
BuilderPafawag Wrocław
Cegielski
Model4E (Pafawag)
303E (Cegielski)
Build date1965–1994
Total produced483
Specifications
Configuration:
​
 • AARB-B
 • UICBo′Bo′
Gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge
Driver dia.1,250 mm (49.21 in)
Length15.915 m (52 ft 2+5⁄8 in)
Width3.038 m (9 ft 11+5⁄8 in)
Height4.343 m (14 ft 3 in)
Loco weight80 t (79 long tons; 88 short tons)
Electric system/s3,000 V DC overhead
Current pickup(s)Pantograph
Traction motorsEE 541B
TransmissionGear ratio: 79:18
Loco brakeOerlikon
Performance figures
Maximum speed125 km/h (78 mph)
Power output2,000 kW (2,680 hp)
Tractive effort280 kN (62,950 lbf)
Career
OperatorsPKP
ClassEU07
NicknamesSiódemka
Delivered1965

Technical data

EU07s have driving cabs at each end of the locomotive. The locomotive is equipped with multiple unit control system, which allows a single driver to drive two coupled engines from one cab. This engine is able to pull passenger trains of up to 650-tonne (640-long-ton; 720-short-ton) weight with speed of 125 km/h (78 mph) and freight trains of up to 2,000 t (2,000 long tons; 2,200 short tons) weight with speed of 70 km/h (43 mph). These figures apply to driving on level track.

History
EU07-544 running passenger service, 1993

The EU07 is strongly connected with the EU06 locomotive. The EU06 was a Polish derivative of the Class 83 locomotive built for the British system. In 1959 an agreement was signed with the producer of the EU06, English Electric, under which Poland bought the license for the EU06 and started its production in Pafawag Wrocław, under build number 4E. The first item was finished in 1965, and by 1974 a total number of 240 locomotives had been built. The EU07 locomotives differed slightly from EU06 due to some minor improvements that had been made in comparison to their predecessors.

In 1983 the production of EU07 locomotives was re-opened in Cegielski works in Poznań. This new series of locomotives was based on ET41 freight locomotive (which had been built by joining together two EU07 locomotives of first run production). Bringing several modifications production number changed to 303E. A total number of 243 locomotives were built and the production continued until 1994 despite relatively outdated construction.

Modifications

All EU07 locomotives were originally fitted with large headlights, called the buckets. After 1990 these have been successively replaced with halogen headlights of smaller diameter. The easiest (and cheapest) way was to put the new headlights inside the "buckets". More elaborate changes included removing the "buckets" and mounting the headlights flush with the body panels for better aerodynamic performance.

EP07 is a later modification of EU07, with changed motors and gear ratios to make them better suited for hauling passenger trains. Modification has been made in several Rolling Stock Repairing Works since 1995. EP07 locomotives retained their original fleet numbers.

EU07A is a very comprehensive modification of EU07 encompassing new motors, power electronics, new brake system, etc. Originally, after evaluating test results, PKP Intercity made a decision not to modify any further units due to unsatisfactory costs versus results ratio but in 2012 ordered further two units. These were delivered in 2014. Further 6 units were be modified for Przewozy Regionalne but the plans were shelved.[2] In 2020 PKP Intercity signed contract for modification of further 20 EU07s to the EU07A standard.[3]

The following engines are heavily based on EU07:

  • ET22 — heavy goods engine using pneumatics, electrics and motors of EU07
  • EP08 — increased Vmax thanks to different motors and powertrains
  • ET41 — articulated twin engine consisting of 2 permanently coupled EU07

Accidents

On 12 August 2011, locomotive number 1034 derailed at Baby, Piotrków County whilst hauling a passenger train from Warszawa Centralna to Katowice. Two passengers were killed and 81 were injured.

Nicknames
  • Siódemka (The Seven) — from the number
  • Ełka

See also
Wikimedia Commons has media related to PKP class EU07.

References
  1. Because this locomotive was produced in Pafawag Wrocław (1964-1974) and in HCP Poznań (1983-1992) in other types: 4E (produced in Pafawag) and 303E (in HCP Poznań).
  2. Madrjas, Jakub (5 June 2014). "Kolejne EU07A za chwilę w PKP Intercity" [More EU07As to be delivered to PKP Intercity soon]. Rynek Kolejowy (in Polish). Archived from the original on 7 June 2014.
  3. Madrjas, Jakub (22 September 2020). "PKP IC będzie mieć 20 kolejnych lokomotyw na 160 km/h. Jest umowa z Olkolem [szczegóły]" [PKP Intercity will get further 20 160 km/h locomotives. Contract with Olkol signed [details]]. Rynek Kolejowy (in Polish).
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