vetoyksikön

The term "vetoyksikkö" is a Finnish word that translates to "traction unit" in English. It commonly refers to a vehicle or piece of equipment that provides the motive power for a train. This can include locomotives, which are self-propelled railway vehicles designed solely for hauling trains, or sometimes the driving units of a multiple unit train.

In the context of railway operations, the vetoyksikkö is a critical component responsible for pulling or pushing carriages along the tracks. Its power output, weight, and adhesion characteristics are key factors determining the train's speed, acceleration, and ability to overcome gradients. Different types of vetoyksiköt exist, including diesel-electric locomotives, electric locomotives, and diesel multiple units. The choice of vetoyksikkö depends on factors such as the route, cargo, and available infrastructure, particularly the presence of overhead electrification for electric locomotives. The efficient operation and maintenance of vetoyksikkö are essential for the smooth running of railway networks.