Railways series 420

Series 420
Triebwagen 420 001-0
technical data
series designation 420/421
setting into service (1. Year) of 1971
manufacturers MAN ONE, WMD, LHB, MBB,
O&K, Uerdingen, WU
oh formula Bo'Bo'+ Bo'Bo'+ Bo'Bo'
track width: 1435 mm
of length over buffer 67.4 m
(23.3 m + 20.8 m + 23.3 m)
width 3.08 m
pivot distance 16.5 min the final car,
14 m in the Mittelwagen
rotary stand wheel set conditions 2.5 m
wheel diameter 0.85 m
floor height approx. 1 m
empty weight 129 t and/or. 138 t depending on series
pay load 15 t and/or. 24 t
(depending on series)
current system 15 kV, 16.7 cycles per second
of output per hour 12 x 200 =2400 KW
of speed during
output per hour
72 km/h
starting acceleration 0.9 m/s 2
brake delay
from 120 km/h
-0.9 m/s 2 regularly,
-0.95 m/s 2 during rapid stop
maximum speed 120 km/h (in 40 s attainable)
number of seats 194, of it 1. Kl. 17 or 33 (deviations depending on seriespossible)
manufactured number of items 480 units

of the ET 420 is an electrical triebzug for the rapid-transit railway - traffic in alternating current - rapid-transit railway nets, thus outside from Hamburg and Berlin. It becomes so far exclusively of the German course AG and/or. their subsidiaries assigned.

Table of contents

to vehicle

the vehicle consists of three shortcoupled parts, two final cars and a Mittelwagen (the Mittelwagen with the railways under the serial number 421 one leads); between the vehicle parts no transition is possible. All Mittelwagen are in aluminum lightweight construction waymanufactured; the final cars were held, however starting from 420 131/631 in aluminum were likewise implemented first still in steel construction method, what saved nine tons of empty weight. At the final cars sharp mountain clutches are inserted, in order to make fast coupling and uncoupling possible of the units. Like that in the German rapid-transit railway enterprise the possible are Configurations of short course (a unit), execution (two units) and long course (three units) fast manufacture and dissolvable.

Each car rests on two air-fitted with springs, fourwheel Triebdrehgestellen. All twelve axles of the course are thus propelled. The Tatzlager Einzelachsmotoren (Tatzrollenlager, fitted with springs greater wheels) becomes over thyristor - an ingate price increase with two asymmetrical-halfsteered Rectifier bridges in sequence circuit steplessly headed for. Service brake is the electrical brake, which is if necessary supplemented by an electro-pneumatic compressed air brake.

Further each car has four doors on each side (altogether thus 24 per unit), which makes a fast passenger change possible together with the elevatorsame entrance. ThatLion's share of the vehicles is equipped, only thereby with bag sliding doors the last two series has swiveling sliding doors.

employment history

was opened as 1972 in Munich a new rapid-transit railway - net, whose building was promoted by in the same year taking place olympic plays, had new, modernVehicles for fast traffic to be procured. The three-part Triebzüge of the series ET 420/421 proved as very successful construction. They did not only find in Munich a at home, also on the rapid-transit railway Rhine Ruhr, to the rapid-transit railway Frankfurt Rhine Main and in Stuttgart rapid-transit railway nets already were themto find short time later. The sets stationed in Cologne and Duesseldorf were replaced however later by locomotive-covered Wendezüge with x-cars. Free the rapid-transit railway courses become were transferred to the other rapid-transit railway nets, where they were urgently needed.

In the course of the time the color dress of the Triebzüge changedagain and again substantially. At first the courses for residents of Munich the rapid-transit railway net were provided with a blue strip window. Gradually most courses, first in the other rapid-transit railway nets, were provided later also in Munich, with an orange/a flint-grey lacquer finish. Today already nearly all courses drive, to the newRailway color pattern accordingly, in traffic red. Gradually the Triebzüge of the BR 420/421 are replaced however by the modern driving courses of the BR 423, then the courses of the BR 420/421 in Stuttgart area on the lines the S1 and S3 were displaced already perfectly (partly stillon the “short S1” and/or. as Übergangszwischentakter to the S4-S6).

Series 420 in traffic-red in Frankfurt/Main

in Munich are the assignment of the ET 420 terminated, the last course in December 2004 were deactivated. Frankfurt/Main sets the ET 420 with exceptionthe lines S1, S4 and S6 everywhere and built only recently GSM R radios into some units. Starting from timetable change June 2004 inserts likewise the traffic group Rhine Ruhr into North-Rhine/Westphalia the 420er of the older series. It is used first on two rapid-transit railway lines. There those becomeold radios by the new generation does not replace. Now all ET 420, whose time for appeal runs off, z-is placed to unconfirmed rumors to consequence (turned off). Only the 7. and 8. Series, end of the 80's until October 1997 built and with swiveling sliding doors equipped, get still another revision. Some ET-420-Einheitenfrom Munich as X420 to the rapid-transit railway enterprise of the Swedish capital Stockholm were lent. These ran there under the railways daughter “railways Regio Sverige OFF” on behalf of STARTING FROM breakdown Stockholm Lokaltrafik. Already in November first of these units became the scrapping after Nykroppa inCentral Sweden driven off. The employments ended then to 14. December 2005, and to 16. Decembers 2005 began the last three X420-Einheiten (054+058+044) their last journey after Nykroppa. Thus this moose-safe 420-Variante is already again history.

Two Triebzüge of the 7. Series (420,400 & 420,416)Krefeld Oppum received an extensive Redesign program under the title “ET 420 pluses” in the repair work. The two prototypes have an interior Design leaned against the following rubbing vehicle ET 423 (similar colour), furthermore received it automatic door closing devices with TAV, an air conditioning system, a passenger information system on basis from Railvox with LED interiorand LCD external announcements. In addition emergency call substations were inserted to the traction vehicle leader at each door and monitoring cameras in each compartment. Since that 10. April 2006 the two vehicles are the lines S1, S4 and S5 Stuttgart rapid-transit railway nets in the Probebetrieb with passengers.

The first prototype420,001 after de-activating by the rapid-transit railway Munich was transferred to railways in December 2004 to the museum in Nuremberg, remains however until at least 2008 still in Munich, where it stands for separating and anniversary travels for order and from the community of interests rapid-transit railway Munich registered association. one cares for.

see also

Web on the left of


to literature

  • Christian Stanski: Absolutely reliably. The series 420. In: LOCOMOTIVE MAGAZINE. No. 252/Jahrgang 41/2002. GeraNova magazine publishing house GmbH Munich, ISSN 0458-1822, S. 36-45.
  • Markus O. Robold: Series 420/421 - Change program “ET 420plus” in the work Krefeld Oppum. in: “Railway courier” expenditure 9-2005, page of 13, 2 pictures, 1 diagram, input clutch publishing house, Freiburg, 2005, ISSN 0170-5288
  • Markus O. Robold: Of Stuttgart rapid-transit railway modernizes - “roll Out” of the first ET 420 pluses.in: “City traffic” edition November/December 11/12 2005, pages 24-27, input clutch publishing house, Freiburg, 2005, ISSN 0038-9013
  • Markus O. Robold: ET 420 pluses - “classical authors” refurbished in: “LOCOMOTIVE MAGAZINE” No. 5 (May 2006), pages 64-69, EGeraNova magazine publishing house GmbH Munich, ISSN 0458-1822


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