Modernising a tram traction converter

It was necessary to adapt trams and modernise the infrastructure for Helsinki City Transport to enable persons with reduced mobility to travel in safety. The low floor middle sections had to be designed for trams of the NRVII type.

In 2005-2012, as commissioned by Helsinki City Transport (HKL), we modernised electrical drive and brake control systems for various trams. In addition we designed electrical systems for the added low floor section.

We also redesigned and manufactured a complete set of analogue and microprocessor-controlled control cards for the MLNRV electrical systems. The quality requirements have been fulfilled according to the rail vehicle electronic equipment EN 50155 standard.

These control cards are used daily in up to 52 trams, simultaneously carrying as many as up to 10,000 of Helsinki’s residents.