PKP class EN97 explained

EN97[1] [2]
Stocktype:electric multiple unit
Manufacturer:Pesa
Assembly:Bydgoszcz, Poland
Yearconstruction:2011–2012
Numberbuilt:14
Capacity:500
Trainlength:60000m (200,000feet)
Width:2850mm
Height:4452mm
Floorheight:500mm
Maxspeed:80km/h
Weight:101.5t
Enginetype:induction motor
TME42-26-4
Transmission:Wikov AWHC500Z
Acceleration:1.2 m/s²
Poweroutput:1,440 kW
Electricsystem:/
Aarwheels:Bo'2'Bo'+Bo'2'Bo'
Brakes:MZT Hepos (ED+EP+K)

Pesa 33WE (EN97 series) is a standard-gauge, low-platform electric multiple unit produced by Pesa in Bydgoszcz in a quantity of 14 units for the Warsaw Commuter Railway. They replaced the EN94 series trains.

History

Origins

After World War II, electric multiple units were produced exclusively by Pafawag from Wrocław until 1997.[3] Pafawag was the manufacturer of the most popular electric multiple unit in Poland, the EN57 series, as well as the EN94 used by the Warsaw Commuter Railway.[4] After its privatization in the 1990s, Pafawag ceased the production of such vehicles, with the last model produced being the ED73 in 1997. For several years, no electric multiple units were produced in Poland.[5]

During this time, Polish State Railways and later local governments primarily purchased diesel railcars and diesel multiple units, as fuel-hungry locomotives dominated non-electrified lines. This period allowed Polish manufacturers to gain experience in building and operators in utilizing lightweight rolling stock.[6] Additionally, existing EN57 series multiple units were modernized.[7]

Building on the experience gained from producing smaller diesel vehicles, Pesa undertook the challenge of constructing its first electric multiple unit – the 13WE – in 2004.[8]

Order history

As early as 2004, the Warsaw Commuter Railway planned to purchase an additional 9 units of the 13WE series.[9] However, it was not until 27 May 2009 that a tender was announced for 14 units with similar parameters to the 13WE, but with fewer seats.[10] This tender was canceled on October 9 due to budget overruns. On 5 November 2009, a new tender for 14 vehicles was announced,[11] with slightly different technical parameters, including the abandonment of single-space trains. The tender was won again by Pesa, which proposed entirely new units – the 33WE. The purchase agreement was signed on 26 March 2010.[12]

In the tenders for Warsaw Commuter Railway, Pesa could not offer vehicles from the Elf family due to requirements such as the smaller minimum curve radius (Warsaw Commuter Railway – 22 m, Elf – 100 m) and floor height (Warsaw Commuter Railway – from 400 to 600 mm, Elf – from 760 to 800 mm).[13]

The new vehicle was designed by Pesa with the participation of the as part of development work.[14]

Construction

Body

The 33WE is a six-car, two-space, partially low-floor electric multiple unit designed for suburban services. Each unit consists of two identical three-car sections, designated as a and b.[15] Each section is equipped with one driver's cabin and a special control panel (referred to as the maneuvering panel) at the opposite end, featuring vehicle status displays and monitoring systems. This design allows both halves of the unit to operate independently in workshop conditions. This solution was chosen due to frequent collisions with road vehicles on the Warsaw Commuter Railway.

Interior

Both sections of the train have four pairs of sliding doors. The floor height at the doors is 500 mm above the top of the rail. Most seats in the unit are oriented parallel to the windows, with traditional 2+2 seating arranged only in the central cars of each section.[16] The train includes 8 bicycle spaces and 4 spaces for disabled passengers. The vehicles are equipped with air conditioning for both the driver's cabin and passenger compartments, a monitoring system, and visual and auditory information systems, but lack toilets.

Undercarriage and drive

Each of the six cars is supported by one bogie. Four of the bogies, located under the end cars of each section, are drive bogies of type 34MN with a wheelbase of 2,300 mm, while the remaining two are non-driven bogies of type 43AN with a wheelbase of 2,100 mm. The bogie pivot spacing for each section of the unit is 11,750 mm. This configuration allows the train to navigate curves with a minimum radius of 23.5 meters.[17]

The vehicles were designed to operate on a 3,000 V DC supply, which was the target voltage for the Warsaw Commuter Railway at that time. During the transition period, they were powered by 600 V DC using a 600/3,000 V converter. The vehicles cannot be simultaneously adapted to both voltages.

The drive consists of 8 three-phase induction motors type TME42-26-4 produced by Traktionssysteme Austria, each with a power output of 180 kW. The torque is transmitted to the wheelsets via a two-stage gearbox AWHC500Z produced by Wikov.

Safety

The structural strength is classified as P-III according to the PN-EN 12663 standard.[18] The vehicles are equipped with a Radio-Stop function via a radio telephone produced by Pyrylandia.

Modifications based on passenger feedback

During the prototype testing phase, the Warsaw Commuter Railway allowed passengers to provide feedback on the train, some of which was incorporated into the construction of subsequent units.[19] Additional handrails were installed in the passenger area, existing ones were repositioned, the passenger information system was modified, some luggage shelves were reduced, and the method of securing bicycles was changed. Additionally, the vehicle's suspension was adjusted, and stationary noise was reduced.

In the summer of 2012, issues with the air conditioning system arose, leading to its overhaul in all vehicles.[20]

Reliability

The vehicles require frequent re-profiling of the wheelset surfaces.[21] Due to this issue, at the beginning of 2013, Warsaw Commuter Railway provided Pesa with one unit for additional testing on the Test Track Centre near Żmigród at the Railway Institute in Węglewo, as well as on the Warsaw Commuter Railway.[22] At the beginning of 2014, one unit was operated on the Warsaw Commuter Railway with a modified control system. This modification involved increasing the contribution of the electro-dynamic brake in the braking process.[23] Ultimately, this change was implemented in all EN97 units.[24]

Passengers using the new units complained about the ergonomics of the interior and issues with the air conditioning.[25] In July 2013, one of the units was withdrawn from service by the Office of Rail Transport due to excessive temperature and carbon dioxide levels inside the vehicle.[26] A similar situation occurred in June 2014, when the Office of Rail Transport ordered the withdrawal of 4 vehicles.[27] In response to the air conditioning problems, Pesa modified the air supply channels and applied film to the windows.[28]

On 16 October 2013, a fire broke out in the driver's cabin of an EN97 unit at the locomotive depot. The incident was investigated by a specially appointed commission, and other EN97 units were not withdrawn from service.[29]

Operation

CountryOperatorTypeNumberDesignationDeliveryStart of operationSources
PolandWarsaw Commuter Railway33WE14EN97-0017 December 201112 January 2012 (observed)17 February 2012 (regular)[30] [31] [32]
EN97-00228 March 20123 April 2012[33]
EN97-00325 April 201210 May 2012[34]
EN97-00426 April 20129 May 2012
EN97-00530 May 20121 June 2012[35]
EN97-00631 May 20125 June 2012
EN97-00726 June 20123 July 2012[36]
EN97-00828 June 20125 July 2012
EN97-00924 July 20125 August 2012[37]
EN97-01031 July 201210 August 2012
EN97-01128 August 20126 September 2012[38]
EN97-01230 August 20127 September 2012
EN97-01322 September 201227 September 2012[39]
EN97-01428 September 20123 october 2012
On 7 December 2011, the first unit was delivered to the locomotive depot in Grodzisk Mazowiecki, began testing on the Warsaw Commuter Railway on December 8, and was finally accepted on 11 January 2012. It then started observed passenger service on 12 January 2012,[40] which was intended to gather feedback from passengers for potential modifications in subsequent units.[41]

The second unit arrived in Grodzisk on 28 March 2012,[42] modified based on passenger feedback from the prototype, and was accepted on March 30. Subsequent units were delivered in batches of two per month.[43] [44] The last unit was delivered on 28 September 2012[45] and began service on 3 October 2012.

As the EN97 units were delivered, the older EN94 units were progressively sold for scrap.[46] [47] By early 2014, EN94 units were still in use, with between 7 and 8 EN97 units and between 3 and 4 EN94 units operating during peak hours. On 1 July 2015, EN94 units were withdrawn for the summer period due to reduced traffic on the Warsaw Commuter Railway caused by renovations, making EN97 units the only rolling stock operating on the line.[48]

In summer 2013, Warsaw Commuter Railway planned to change the traction voltage from 600 V to 3,000 V, but due to problems with the EN97 units, this change was postponed. On the night of April 30 to May 1, 2016, the first trial activation of the new voltage took place, with EN97-001 operating as a service train on the Grodzisk Mazowiecki Radońska–Komorów–Grodzisk Mazowiecki Radońska route.[49] On May 28, the day after the voltage change, at around 4:30 AM,[50] EN97-011 experienced a malfunction during a service run from Grodzisk to Warsaw, causing disruptions on the line until 7:00 AM.[51]

On 1 June 2016, at approximately 12:15 AM,[52] a MAN SE truck passing through a level crossing[53] in Grodzisk Mazowiecki collided with EN97-001 traveling from Warsaw to Grodzisk. The train derailed, leading to disruptions on the line until 10:10 AM and a bus replacement service from Grodzisk to Podkowa Leśna.

References

  1. Terczyński . Paweł . 2012 . Nowe zespoły trakcyjne WKD serii EN97 . New Warsaw Commuter Railway EN97 Series Trainsets . Świat Kolei . pl . Łódź . Emi-press . 9 . 12-13 . 1234-5962.
  2. Web site: Elektropoezd EN95 . ru:Электропоезд EN95 . Electric Train EN95 . https://web.archive.org/web/20141206091700/http://www.advantageaustria.org/ua/oesterreich-in-ukraine/news/lokal/Traktionssysteme_2.pdf . 2014-12-06 . advantageaustria.org . ru.
  3. Rusak . Ryszard . 2005 . Od Pafawagu do Bombardiera. 60 lat Państwowej Fabryki Wagonów Pafawag we Wrocławiu . From Pafawag to Bombardier: 60 Years of the Pafawag State Wagon Factory in Wrocław . Świat Kolei . pl . Łódź . Emi-press . 10 . 1234-5962.
  4. Terczyński . Paweł . 2005 . Pafawag – kronika produkcji . Pafawag – Production Chronicle . Świat Kolei . pl . Łódź . Emi-press . 10 . 1234-5962.
  5. Book: Terczyński, Paweł . Atlas Lokomotyw 2007 . Poznański Klub Modelarzy Kolejowych . 2007 . 978-83-920757-7-6 . III . Poznań . 74-103 . pl . Locomotive Atlas 2007 . Elektryczne zespoły trakcyjne . Electric Multiple Units.
  6. Terczyński . Paweł . 2008 . Wagony i zespoły spalinowe w obsłudze ruchu regionalnego na PKP . Diesel Railcars and Multiple Units in Regional Service on PKP . Świat Kolei . pl . Łódź . Emi-press . 9 . 12-21 . 1234-5962.
  7. Waga . Bogdan . 2007 . Elektryczne na start . Electric on the Start . Koleje Małe i Duże . pl . Łódź . Emi-press . 1 . 18-27 . 1234-5962.
  8. Book: Terczyński, Paweł . Atlas Lokomotyw 2007 . Poznański Klub Modelarzy Kolejowych . 2007 . 978-83-920757-7-6 . III . Poznań . 96 . pl . Locomotive Atlas 2007 . EN95.
  9. Tomaszewski . Tomasz . 2004 . EN95 – nowy zespół trakcyjny dla Warszawskich Kolei Dojazdowych . EN95 – New Trainset for Warsaw Commuter Rail . Świat Kolei . pl . Łódź . Emi-press . 9 . 3 . 1234-5962.
  10. Web site: 2 June 2009 . WKD kupuje pociągi . Warsaw Commuter Railway Is Buying Trains . 2024-09-16 . TransInfo . pl-PL.
  11. Web site: 5 November 2009 . Nowy przetarg na 14 ezetów dla WKD . New Tender for 14 EZTs for Warsaw Commuter Railway . https://web.archive.org/web/20150307193032/http://www.rynek-kolejowy.pl/13300/Nowy_przetarg_na_14_ezetow_dla_WKD.htm . 2015-03-07 . rynek-kolejowy.pl . pl.
  12. Web site: 10 November 2009 . Przetarg na dostawę 14 ezt dla WKD . Tender for the Supply of 14 Emus for Warsaw Commuter Railway . 2024-09-16 . TransInfo . pl-PL.
  13. Terczyński . Paweł . 2012 . Elektryczne zespoły trakcyjne rodziny Elf . Electric Multiple Units of the Elf Family . Świat Kolei . pl . Łódź . Emi-press . 3 . 26-33 . 1234-5962.
  14. Web site: Czerwiński . Jarosław . Durzyński . Zbigniew . 5 July 2016 . Możliwości współpracy Instytutu Pojazdów Szynowych Tabor z producentami pojazdów szynowych . Opportunities for Collaboration between the Institute of Railway Vehicles Tabor and Manufacturers of Railway Vehicles . http://web.archive.org/web/20160806132403/https://www.mr.gov.pl/media/22271/InstytutPojazdowSzynowycyhTABOR.pdf . 2016-08-06 . mr.gov.pl . 6 . pl.
  15. Web site: 12 January 2012 . Pierwszy skład EN97 już w stolicy! . The First EN97 Trainset Has Arrived in the Capital! . 2024-09-16 . kurier-kolejowy.pl . pl.
  16. Web site: Nowy pociąg WKD prawie gotowy . New Warsaw Commuter Railway Train Almost Ready . https://web.archive.org/web/20111127092258/http://www.rynek-kolejowy.pl/28999/Nowy_pociag_WKD_prawie_gotowy.htm . 2011-11-27 . rynek-kolejowy.pl . pl.
  17. Book: Kroma, Robert . Normalnotorowe wagony silnikowe kolei polskich 1991–2013 . Sosiński . Janusz . Zintel . Krzysztof . BWH Kolpress . 2014 . 978-83-933257-6-4 . 1 . Poznań . 212-216 . pl . Standard-Gauge Motorized Railcars of Polish Railways 1991–2013 . Dwunapięciowe zespoły trakcyjne 33WE dla WKD . Twelve-Five Electric Multiple Units 33WE for Warsaw Commuter Railway.
  18. Web site: Zakup kolejowego taboru pasażerskiego do obsługi połączeń regionalnych na linii Warszawskiej Kolei Dojazdowej w Warszawskim Obszarze Metropolitalnym . Purchase of Passenger Rolling Stock for Regional Services on the Warsaw Commuter Railway in the Warsaw Metropolitan Area . http://web.archive.org/web/20160305030005/http://www.wkd-rpowm.eu/wp-content/uploads/002_Ulotka.pdf . 2016-03-05 . wkd-rpowm.eu . pl.
  19. Web site: Kubacki . Kamil . 11 April 2012 . Które z sugestii pasażerów uwzględniono w nowych pociągach WKD? . Which Passenger Suggestions Have Been Incorporated into the New Warsaw Commuter Railway Trains? . https://web.archive.org/web/20120628041206/http://www.obiektyw.info/index.php/article/all/all/full/3449 . 2012-06-28 . Obiektyw info . pl.
  20. Web site: 27 July 2012 . Wadliwa klimatyzacja w pojazdach EN97 . Faulty Air Conditioning in EN97 Vehicles . 2024-09-16 . kurier-kolejowy.pl . pl.
  21. Web site: 29 January 2013 . Nowe pociągi Pesy zawiodły WKD. Pasażerów wożą stare składy . New Pesa Trains Fail Warsaw Commuter Railway: Passengers Are Still Using Old Trains . https://web.archive.org/web/20130204101850/http://www.rynek-kolejowy.pl/39173/Nowe_pociagi_Pesy_zawiodly_WKD_Pasazerow_woza_stare_sklady.htm . 2013-02-04 . rynek-kolejowy.pl . pl.
  22. Web site: 31 March 2013 . WKD: czas zmian (wywiad) . Warsaw Commuter Railway: Time for Change (Interview) . 2024-09-16 . kurier-kolejowy.pl . pl.
  23. Web site: 7 February 2014 . Pesa pracuje nad rozwiązaniem problemów nowych pociągów WKD . Pesa is Working on Solutions for the Problems with the New Warsaw Commuter Railway Trains . https://web.archive.org/web/20140225212002/http://www.rynek-kolejowy.pl/50760/pesa_pracuje_nad_rozwiazaniem_problemow_nowych_pociagow_wkd.htm . 2014-02-25 . rynek-kolejowy.pl . pl.
  24. Web site: 26 August 2014 . WKD przejdzie na 3 kV za około 18 miesięcy . Warsaw Commuter Railway Will Switch to 3 kV in About 18 Months . 2024-09-16 . kurier-kolejowy.pl . pl.
  25. Web site: 1 August 2013 . Artykuł o problemach technicznych EN97 . Article on Technical Problems with EN97 . https://web.archive.org/web/20131029201938/http://wiadomosci.wpr24.pl/utk_wycofal_nowy_pociag_wkd;16749.html . 2013-10-29 . WPR24 . pl.
  26. Web site: 31 July 2013 . UTK wyłącza z eksploatacji nowy pociąg WKD . Office of Rail Transport Withdraws New Warsaw Commuter Railway Train from Service . https://web.archive.org/web/20140601150611/http://www.rynek-kolejowy.pl/46952/utk_wylacza_z_eksploatacji_nowy_pociag_wkd.htm . 2014-06-01 . rynek-kolejowy.pl . pl.
  27. Web site: 20 June 2014 . UTK wyłączył w czerwcu wiele pojazdów, m.in. KD i WKD. Co dalej? . Office of Rail Transport Withdraws Many Vehicles, Including Koleje Dolnośląskie and Warsaw Commuter Railway, in June. What's Next? . https://web.archive.org/web/20140623151657/http://www.rynek-kolejowy.pl/52831/utk_wylaczyl_w_czerwcu_wiele_pojazdow_m_in_kd_i_wkd_co_dalej.html . 2014-06-23 . rynek-kolejowy.pl . pl.
  28. Web site: 1 September 2014 . WKD gotowa do zmiany napięcia. Ale jeszcze poczeka . Warsaw Commuter Railway Ready to Change Voltage. But It Will Have to Wait . https://web.archive.org/web/20140904031427/http://www.rynek-kolejowy.pl/53764/wkd_gotowa_do_zmiany_napiecia_ale_jeszcze_poczeka.html . 2014-09-04 . rynek-kolejowy.pl . pl.
  29. Web site: 18 October 2013 . Komisja zbada sprawę pożaru wukadki . The Commission Will Investigate the Fire Incident with the Warsaw Commuter Railway Train . https://web.archive.org/web/20131029200715/http://wiadomosci.wpr24.pl/komisja-zbada-sprawe-pozaru-wukadki;17670.html . 2013-10-29 . wiadomosci.wpr24.pl . pl.
  30. Web site: Dostarczono nowy pojazd . A New Vehicle Has Been Delivered . https://web.archive.org/web/20160307225344/http://www.wkd-rpowm.eu/dostarczono-nowy-pojazd/ . 2016-03-07 . wkd-rpowm.eu . pl.
  31. Web site: Pierwszy kurs EN97-001 w ruchu pasażerskim . First EN97-001 Service in Passenger Operation . https://web.archive.org/web/20160307225356/http://www.wkd-rpowm.eu/pierwszy-kurs-en97-001-w-ruchu-pasazerskim/ . 2016-03-07 . wkd-rpowm.eu . pl.
  32. Web site: 17 February 2012 . Grodzisk Mazowiecki: EN97-001 oficjalnie przekazany . Grodzisk Mazowiecki: EN97-001 Officially Handed Over . 2024-09-16 . TransInfo . pl-PL.
  33. Web site: Dostawa pojazdu EN97-002 . Delivery of EN97-002 Vehicle . https://web.archive.org/web/20160307225446/http://www.wkd-rpowm.eu/dostawa-pojazdu-en97-002/ . 2016-03-07 . wkd-rpowm.eu . pl.
  34. Web site: Dostawa pojazdów EN97-003 i EN97-004 . Delivery of EN97-003 and EN97-004 Vehicles . https://web.archive.org/web/20160307225510/http://www.wkd-rpowm.eu/dostawa-pojazdow-en97-003-i-en97-004/ . 2016-03-07 . wkd-rpowm.eu . pl.
  35. Web site: Dostawa pojazdów EN97-005 i EN97-006 . Delivery of EN97-005 and EN97-006 Vehicles . https://web.archive.org/web/20160307225525/http://www.wkd-rpowm.eu/dostawa-pojazdow-en97-005-i-en97-006/ . 2016-03-07 . wkd-rpowm.eu . pl.
  36. Web site: Dostawa pojazdów EN97-007 i EN97-008 . Delivery of EN97-007 and EN97-008 Vehicles . https://web.archive.org/web/20160307225536/http://www.wkd-rpowm.eu/dostawa-pojazdow-en97-007-i-en97-008/ . 2016-03-07 . wkd-rpowm.eu . pl.
  37. Web site: Dostawa pojazdów EN97-009 i EN97-010 . Delivery of EN97-009 and EN97-010 Vehicles . https://web.archive.org/web/20160307225607/http://www.wkd-rpowm.eu/dostawa-pojazdow-en97-009-i-en97-010/ . 2016-03-07 . wkd-rpowm.eu . pl.
  38. Web site: Dostawa pojazdów EN97-011 i EN97-012 . Delivery of EN97-011 and EN97-012 Vehicles . https://web.archive.org/web/20160307225631/http://www.wkd-rpowm.eu/dostawa-pojazdow-en97-011-i-en97-012/ . 2016-03-07 . wkd-rpowm.eu . pl.
  39. Web site: Dostawa pojazdów EN97-013 i EN97-014 . Delivery of EN97-013 and EN97-014 Vehicles . https://web.archive.org/web/20160307225640/http://www.wkd-rpowm.eu/dostawa-pojazdow-en97-013-i-en97-014/ . 2016-03-07 . wkd-rpowm.eu . pl.
  40. Web site: 12 July 2012 . 14 nowych pociągów dla WKD . 14 New Trains for Warsaw Commuter Railway . 2024-09-16 . wkd.com.pl . pl.
  41. Web site: 12 January 2012 . EN97 dopuszczony do eksploatacji . EN97 Approved for Service . https://web.archive.org/web/20120529185354/http://www.rynek-kolejowy.pl/30105/EN97_dopuszczony_do_eksploatacji.htm . 2012-05-29 . rynek-kolejowy.pl . pl.
  42. Web site: 5 April 2012 . Drugi pociąg WKD już kursuje . The Second Warsaw Commuter Railway Train is Already in Service . https://web.archive.org/web/20120512144145/http://wiadomosci.wpr24.pl/drugi_pociag_wkd_juz_kursuje . 2012-05-12 . wiadomosci.wpr24.pl . pl.
  43. Web site: 26 April 2014 . WKD ma już cztery nowe pociągi . Warsaw Commuter Railway Already Has Four New Trains . https://web.archive.org/web/20120428023532/http://www.rynek-kolejowy.pl/32483/WKD_ma_juz_cztery_nowe_pociagi.htm . 2012-04-28 . rynek-kolejowy.pl . pl.
  44. Web site: 31 May 2014 . WKD ma już sześć nowych pociągów . Warsaw Commuter Railway Already Has Six New Trains . https://web.archive.org/web/20120614065337/http://www.rynek-kolejowy.pl/33186/WKD_ma_juz_szesc_nowych_pociagow.htm . 2012-06-14 . rynek-kolejowy.pl . pl.
  45. Web site: 4 October 2012 . Wszystkie nowe pociągi WKD już wożą pasażerów . All new Warsaw Commuter Railway trains are now transporting passengers . https://web.archive.org/web/20121008233233/http://www.rynek-kolejowy.pl/35719/Wszystkie_nowe_pociagi_WKD_juz_woza_pasazerow.htm . 2012-10-08 . rynek-kolejowy.pl . pl.
  46. Web site: 15 June 2012 . WKD sprzedaje pociągi EN94 w cenie złomu . Warsaw Commuter Railway is selling EN94 trains at scrap price . https://web.archive.org/web/20120616222958/http://www.rynek-kolejowy.pl/33489/WKD_sprzedaje_pociagi_EN94_w_cenie_zlomu.htm . 2012-06-16 . rynek-kolejowy.pl . pl.
  47. Web site: 22 August 2012 . WKD sprzedaje dwa pociągi serii EN94 . Warsaw Commuter Railway is selling two EN94 series trains . 2024-09-16 . kurier-kolejowy.pl . pl.
  48. Web site: Urbanowicz . Witold . 30 June 2015 . WKD rusza z remontem. Wakacje bez EN94 . Warsaw Commuter Railway starts renovations. Summer without EN94 . 2024-09-16 . www.transport-publiczny.pl . pl-PL.
  49. Web site: Fabisiewicz . Adam . 6 May 2016 . Pociąg 39WE odebrany przez wukadkę . The 39WE train has been received by Warsaw Commuter Railway . https://web.archive.org/web/20160506165012/http://grodzisknews.pl/pociag-39-we-odebrany-przez-wukadke/ . 2016-05-06 . grodzisknews.pl . pl.
  50. Web site: 30 May 2016 . Zmiana napięcia zasilania w sieci trakcyjnej linii WKD . Change of supply voltage in the traction network of the Warsaw Commuter Railway line . https://web.archive.org/web/20160530083726/http://wkd.com.pl/aktualnosci/475-zmiana-napiecia-zasilania-w-sieci-trakcyjnej-linii-wkd.html . 2016-05-30 . wkd.com.pl . pl.
  51. Web site: 28 May 2016 . Utrudnienia na linii WKD w dniu 28.05.2016 (zakończone) . Disruptions on the Warsaw Commuter Railway line on 28.05.2016 (now concluded) . https://web.archive.org/web/20160528062125/http://wkd.com.pl/aktualnosci/473-utrudnienia-na-linii-wkd-w-dniu-28-05-2016.html . 2016-05-28 . wkd.com.pl . pl.
  52. Web site: 1 June 2016 . Uwaga! Wypadek na przejeździe kolejowym i bardzo poważne utrudnienia (zakończone) . Attention! Accident at the railway crossing and very serious disruptions (now concluded) . https://web.archive.org/web/20160601093153/http://wkd.com.pl/aktualnosci/478-uwaga-wypadek-na-przejezdzie-kolejowym-i-bardzo-powazne-utrudnienia.html . 2016-06-01 . wkd.com.pl . pl.
  53. Web site: Pietraszek . Dominik . 1 June 2016 . Ciężarówka zderzyła się z wukadką . A truck collided with a Warsaw Commuter Railway train . https://web.archive.org/web/20160601062717/http://grodzisknews.pl/ciezarowka-zderzyla-sie-z-wukadka/ . 2016-06-01 . grodzisknews.pl . pl.

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