Replace Traction systems of VIRM trains

Strukton Rolling Stock and Alstom replaced the traction systems of 81 VIRM trains on behalf of NedTrain. Strukton Rolling Stock was responsible for the project preparation and detail engineering, and supplied and installed the cabling. VIRM trains are electric multiple units trains operated by the Dutch Railways (NS) for passenger transport.

Rolling stock
The Netherlands
GTO installation
IGBT installation

Scope of delivery

The project covered the replacement of 161 old Gate Turn-off Thyristor (GTO) traction systems with modern, simple IGBT systems. The components of the GTO traction systems were outdated, which made the installations difficult to maintain. Insulated Gate Bipolar (IGBT) systems are able to operate at very high currents. IGBTs have a higher switching frequency, which reduces the current required. This makes travelling by train more sustainable.

A pre try-out (PTO) took place in October 2011 for test purposes and was followed by a try-out (TO) in December 2011, to test if the work could be done in the time set. In February 2012, Strukton started with the serial production and installation.

Internet in the train

NedTrain and Nomad installed wireless internet in the trains as part of the same project, enabling passengers to use wifi in the train. Strukton Rolling Stock increased the electric power capacity of the trains for this aim by installing additional converters and separating the low-voltage grids.