The Type DT4 is a four-car electric multiple unit (EMU) train type operated by the Hamburger Hochbahn AG on the Hamburg U-Bahn system since 1988.

Formation

Every DT4 train consists of four cars, which are formed as two articulated half-sets with two cars each. The cars don't have gangways, but feature windows in the inner car ends.[2]

Interior

The interior consists of transverse seating bays.[2] Widescreen passenger information displays are to be fitted to the whole DT4 fleet, with works scheduled to be completed in 2022.[3]

  • Interior view DT4.1 and DT4.2
    Interior view DT4.1 and DT4.2
  • Interior view DT4.3 and DT4.4
    Interior view DT4.3 and DT4.4
  • Interior with passenger information display in September 2008
    Interior with passenger information display in September 2008
  • Interior of a refurbished train in August 2015
    Interior of a refurbished train in August 2015

Technical specifications

The trains have steel car bodies and a three-phase propulsion system.[2] Thyristor inverters are used in the DT4.1 and DT4.2 trains, and the DT4.3 through DT4.5 trains use GTO-pulse inverters.[2] The DT4.56 and DT4.6 trains use IGBT-pulse inverters.[2]

Each four-car set has four powered bogies and two non-motored jacobs bogies. The powered bogies are equipped with water cooled three-phase asynchronous motors.[2]

History

The development of the DT4 began in 1986, and the first unit was completed on May 30, 1988.[citation needed] Passenger service began on October 17 of the same year.[citation needed]

The DT4 trains are being refurbished since 2011.[citation needed] They receive a newer interior appearance, similar to the interior of the DT5 trains. One car of set 140 was refurbished for testing purposes in summer 2010.[citation needed] Regular refurbishment started in 2011.[citation needed]

References

  1. ^ a b c d Schleife W.; et al. (1992). Metros der Welt [Metros of the world] (in German) (2nd ed.). Berlin: transpress Verlagsgesellschaft. p. 142. ISBN 3-344-70715-9.
  2. ^ a b c d e f Pabst, Martin (2006). S-Bahn- und U-Bahn-Fahrzeuge in Deutschland [S-Bahn and U-Bahn vehicles in Germany] (in German) (2nd ed.). GeraMond. pp. 62–63. ISBN 3-7654-7366-9.
  3. ^ "Mehr Fernsehen in Hamburgs Zügen - Hochbahn baut Unterhaltungs-Angebot aus" [More television on Hamburg's trains - Hochbahn is expanding its entertainment service]. Hamburger Morgenpost (in German). November 1, 2019. Archived from the original on January 5, 2020. Retrieved January 5, 2020.
Allikas: Https://en.wikipedia.org/wiki/Hamburg_U-Bahn_Type_DT4
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