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Stadler Variobahn

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Stadler Variobahn

The Stadler Variobahn (formerly sold as the ABB Variotram, Adtranz Variotram and Bombardier Variotram) is a model of articulated low-floor tram and light rail vehicle. Since its introduction in 1993, the Variobahn has been manufactured variously by ABB, Adtranz, Bombardier Transportation, and since 2001 by Stadler Pankow. As of 2009, 254 trams have been ordered, with an additional 110 on option. A unit costs about €2.5 million.

Operators include the Graz Holding, the Bergen Light Rail, the Chemnitz Tramway, Verkehrsverbund Rhein-Ruhr, the Rhine Neckar Area Tramway and London Tramlink.

The Variotram was first developed by ABB (ASEA Brown Boveri) at Henschel and a prototype was launched in 1993 for the Chemnitz tramway in Germany, operated by Chemnitzer Verkehrs-Aktiengesellschaft (CVAG). The serial delivery, with minor modifications, was made between 1998 and 2001—bringing the total number of units for Chemnitz to thirty. Of these, twenty-four were operated by CVAG and six by City-Bahn Chemnitz. In 1995, ABB's train division merged to become Adtranz. One prototype the following year sold to the Duisburg Stadtbahn, but serial production was never initiated for Duisburg. The Duisburg prototype is now privately owned and stored in Norway.

In 1996, six trams were delivered to serve on the light rail between Mannheim, Heidelberg and Weinheim, Germany, operated by Oberrheinischen Eisenbahn-Gesellschaft. From 2001 to 2007, it ordered additional 20 trams. These were supplemented in 2002 by eight trams for the Heidelberg Tramway, and in 2001–07 by 16 trams for the Mannheim Tramway. In 1996, the Sydney light rail system, in Australia, took delivery of seven trams, which were built in Adtranz's factory in Dandenong, Melbourne, Australia. All were withdrawn by mid-2015 and the remaining six put up for sale. Five were scrapped in early 2018, and the last built, number 2107 was transferred to the Sydney Tramway Museum in October 2018 for preservation.

Forty Variotrams were delivered to Helsinki City Transport (HKL), Finland, between 1998 and 2003 for use on the Helsinki tramway, at a cost of 76 million. These trams were built by Transtech (who later produced the newer Artic models) in Otanmäki under a technology transfer agreement with Adtranz. During this time the company was acquired by Bombardier, who inherited the design in 2000, making the Helsinki trams the only Variotrams to be produced under the Bombardier name.

In service, the Variotrams were found to be ill-suited for Helsinki's tram network, having suffered from numerous technical problems, including cracks in the bogies and vehicle body shells. Before 2009 often less than half of the trams have been in working condition. HKL considered returning the trams to Bombardier as unsatisfactory, but after a long series of negotiations a compromise was reached in May 2007, when the responsibility for maintaining the trams was transferred to Bombardier. The contract agreed in May 2007 states that, from May 2008 onwards, if more than four Variotrams in Helsinki are not in operational condition, Bombardier must pay a daily fine to the HKL for every non-operational tram. If more than eight trams are in non-operational condition, HKL has the right to cancel the contract and return the trams to Bombardier, who are obliged to return the €76 million that HKL paid for the trams. In order to cope with the requirements of the agreement, Bombardier established its own maintenance workshop in Helsinki in mid-2008, located in the premises of the former VR Group electric locomotive workshop in Pasilan Konepaja.

In August 2017 a contract was agreed after long negotiations between HKL and Bombardier to cancel the purchase of the Variotrams. Bombardier will pay HKL 33 million euros in compensation for the shorter than originally contractually agreed 40 year lifetime of the trams. HKL will return the trams to Bombardier from 2018 on.

To concentrate on its own Flexity family of vehicles, Bombardier reached an agreement with the European Commission where Bombardier would divest the Variotram division to Stadler Rail of Switzerland.

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