For locomotives, which are driven by diesel or
electricity, EMU and DEMU vehicles with AC Traction Motors, new microprocessor
based AC-AC Traction System (MAS) offers the latest in technology combining
IGBT based Traction Converter with DSP and microprocessor based embedded
controls. Microprocessor based Locomotive Control system is used in conjunction
with IGBT based traction converter to implement this solution.
Federal Railway of Switzerland has granted ABB
Switzerland an agreement valued approximately SFr 69.2m ($US 75.4m) to provide
latest traction apparatuses for its convoy of 119 Re460 electric locomotives as
a section of a SFr 230m middle-life renovation program.
According to this contract, 202 IGBT traction
converters will be supplied by ABB with an option for 38 additional units which
are water-cooled. As per SSB’s opinion, it will be possible to reduce traction
power consumption by 27GWh per year by converting the convoy to IGBT which is
sufficient electricity to power 6750 homes.
Latest oil-free dual compressors will be used
to equip the Re 460s. These are intended to minimize power dissipation when the
locomotives are immobile. Besides this, advantages like advanced air
conditioning and heating in the driver's cabs and latest fire safety systems
for operation in the Gotthard Base Tunnel can be achieved by using this.
A conventional locomotive will be modernized by
using IGBT converters by the end of coming year and will pass through test runs
for a year before the left 118 locomotives are updated. The renovations will be
executed at SBB's Yverdon-les-Bains workshop and the program is expected to be
finished in 2022.
Since the early 1990s, the 200km/h four-axle
Re460 has been the base of SBB's long-range convoy. As a segment of the Rail
2000 project to bring up-to-date train services and raise retention on the
Swiss mainline network, the locomotives were introduced and these are built by
a Swiss consortium of SLM and ABB. It is expected that this modernization
program will prolong their operational life by 20 years.
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