Railway electrification in Norway

[6] In 1912, all German railway agreed to use the 15 kV  16.7 Hz AC standard, which was later adopted first by Sweden and then by NSB.

[7] During the 1940s, NSB electrified the Sørland Line, although the final section from Egersund to Stavanger was not converted until 1956.

This was largely due to NSB's program to remove all steam locomotives, either by electrification or by dieselization.

In the late 1950s and 1960s, several to-be electrified lines were operated with diesel locomotives as an interim solution.

This finished all the planned electrifications, and the authorities deemed the remaining lines unprofitable to electrify because of low traffic.

Norway, like Germany, Austria and Switzerland, uses single phase 15 kV AC railway electrification at 16 2/3 Hz (precisely) for electric train systems.

Nearly all power is derived from rotary converters or static inverters in the substations, which are fed with three-phase AC of 50 Hertz from the public grid.

In earlier days, Nygårds Hydroelectric Power Station delivered single phase AC for line between Narvik and Kiruna.

From Haugevik Power Plant, two 55 kV long single phase AC powerlines depart, one to Sande and the other to Sundhaugen Switching Station.

A small blue locomotive hauling three wooden passenger cars parked at a wooden platform
The Thamshavn Line became Norway's first electrified when it opened in 1908.
A four-car multiple unit running across a snow-covered plain with mountains in the background
Class 73 train near Dombås on the Dovre Line