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In 1999 Indian Railways (IR) introduced its first diesel-electric freight locomotive with three-phase
AC Traction Technology; the WDG4 locomotive.
This was followed by the first ever IGBT based Traction Converter on Locomotive rolled out on Indian Rails in October 2006. Designed, built and commissioned by Siemens in collaboration with Diesel Locomotive Works (DLW) within a well controlled project schedule involving high quality of project management and system engineering.
It was pressed into service at South Western Railway in Dec’06 and has since been doing satisfactory revenue service. The induction of IGBT based propulsion technology of Siemens has endowed IR locomotives with a range of benefits:
The Locomotive includes Traction Control by Siemens SIBAS®32 microcomputer providing