- TW 6000
The TW 6000 is a type of articulated
light railvehicle used on the Hanover Stadtbahnsystem, originally manufactured by Düwag, AEG, Kiepeand Siemens, the later batches being built by LHB (now part of Alstom).
The vehicle can serve both high platforms and street-level stops; it has cabs at both ends, thus eliminating the need for
turning loops. It was unique in Germany at the time for featuring thyristorchopper control and a contemporary design by Prof. Herbert Lindinger.
A total number of 260 were built from
1974to 1993, of which the first series of 100 was built by Düwag in Düsseldorffrom 1974 to 1978, whilst the second to eighth series (160 in total) were built by LHB in Salzgitterfrom 1979 to 1993. From 2002on, 82 units were sold to Budapest, Hungaryand Den Haag, The Netherlands.
A single unit has a length of 28.28 meters and a width of 2.4 meters, thus significantly increasing capacity compared to its predecessors. Up to 150 passengers can fit into a single car; in normal operations, two cars operate coupled together. The maximum speed is rated at 80 km/h, however it is not possible to sustain this speed on the Hanover network, so the "de facto" maximum speed is 70 km/h. The two DC motors are rated at 218 kW at 600 V each and can draw a maximum current of 900 A.
Cars 6206-6260 are microprocessor controlled, using an
Intel 8085and GTO thyristors.
The following TW 6000 series were delivered:
The lead of the consortium changed over to LHB after the first series due to political lobbying, as subsidies provided by the state of
Lower Saxonywere spent on the project, LHB (which is based in Salzgitter) was favoured over the out-of-state Düwag(with their operations in Düsseldorf, North Rhine-Westphalia).
All TW6000s driven (from the cab, of course) using an integral traction/braking with a deadman's trigger that drivers must depress to mobilise the vehicle, if released while moving, first it (the warning system) beeps, then the
track brakes are applied.
Changes in Series 2
* New floors, lacking the Series 1 furrows
* Smaller stop buttons and warning lights, partly retrofit to Series 1 from 3/81 to 5/85, completely retrofit to Series 1 from 10/88 to 11/92
* Destination indicator inside the Stadtbahn vehicle
* Wiper moved to the right
* Automatic adjustment of couplers after decoupling
* Additional brake resistor on the roof
* Preparations to add additional seats at the middle door (was never carried out)
Changes in Series 3
* IBIS equipment delivered ex factory, retrofit to Series 1 and 2 vehicles until 1987
* Mandatory selection of "steps high" and "steps low" setting before doors can be opened, retrofit to all prior vehicles
Changes in Series 4
* Skylight windows on one side only
* GTO chopper control with 8085 microprocessor
* Fire protection (tested on 6147 from January 1987):
** new sheet metal roof in the passenger compartment
** plastic light covers replaced by steel lamellas
** roof and side handles in joint area replaced with cast plastic handle
* Additional tail lights
Changes in Series 5
* Adjusted size of door windows
* Wider door seals
Changes in Series 6
* Double doors without handrail in the midsection, new lock mechanism (tested on 6083, partly retrofit to older vehicles)
TW 6000 abroad
Two TW 6000 units were lent to operate on a small NS line in
Houten, The Netherlands, connecting Houten station with the new station Houten Castellum.
Eight TW 6000 units were sold to HTM, the public transport operator of
The Hague, where they were in service on line 11 to Scheveningenand at this moment stored at Depot Lijsterbes.
A number of TW 6000 units have been sold to
BKV(Budapesti Közlekedési Rt.), the public transport company of Budapest. They were repainted into an orange livery (earning the nickname "banana" for having arrived green and consumed yellow). They were retrofitted with windows that can slide open in large part to better adjust to hotter continental summers. Their extremely quiet run is well-noted among Budapest residents, used to HEAR soviet-block trams, but lack of high-floor station platforms means elderly and moms with kids must climb up and down the TW 6000's doorwell.
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