Thyristor Control of Multiple Unit Car Equipment by ASEA

In May 1966 the Swedish State Railways (SJ) ordered from Allmänna Svenska Elektriska Aktiebolaget (ASEA) 90 two-car units intended for the suburban services in Stockholm. The order was later increased to a total of 102 two-car sets. In June 1970, 90 sets were delivered. The cars have thyristor control equipment and separately excited dc traction motors. The line voltage is 15 kV, 162/3 Hz.