The Siemens Nexas is a class of electric multiple units manufactured by Siemens Transportation Systems for the suburban railway network of Melbourne, Australia between 2002 and 2005. The design of the trains was based on the Siemens Modular Metro.
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👉 Siemens Nexas in the context of Upfield line
The Upfield line is a commuter railway line in the city of Melbourne, Victoria, Australia. Operated by Metro Trains Melbourne, it is the city's fifth-shortest metropolitan railway line at 20.1 kilometres (12.5 mi). The line runs from Flinders Street station in central Melbourne to Upfield station in the north, serving 19 stations via North Melbourne, Brunswick, Coburg, and Fawkner.
The line operates for approximately 19 hours a day (from approximately 05:00 to around midnight) with a 24-hour service on Friday and Saturday nights. During peak hours, headways of up to 15 minutes are operated, with services every 20–30 minutes during off-peak hours. Trains run in two three-car formations of either Comeng or Siemens Nexas sets.
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Siemens Nexas in the context of Electric multiple unit
An electric multiple unit or EMU is a multiple-unit train consisting of self-propelled carriages using electricity as the motive power. An EMU requires no separate locomotive, as electric traction motors are incorporated within one or a number of the carriages. An EMU is usually formed of two or more semi-permanently coupled carriages. However, electrically powered single-unit railcars are also generally classed as EMUs. The vast majority of EMUs are passenger trains but versions also exist for carrying mail.
EMUs are popular on intercity, commuter, and suburban rail networks around the world due to their fast acceleration and pollution-free operation, and are used on most rapid-transit systems. Being quieter than diesel multiple units (DMUs) and locomotive-hauled trains, EMUs can operate later at night and more frequently without disturbing nearby residents. In addition, tunnel design for EMU trains is simpler as no provision is needed for exhausting fumes, although retrofitting existing limited-clearance tunnels to accommodate the extra equipment needed to transmit electric power to the train can be difficult.