IGBT Converters Are Going to be Used For SBB Locos by ABB

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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