NSB El 7

The NSB El 7 was a series of electric locomotives delivered between 1911 and 1918 to Norsk Transport for the Rjukan Line and the Tinnoset Line, where they were numbered RjB.1, 2, 3, 6, 7 and 8. The electrical motors were built by AEG and the chassis by Skabo. El 7 was exactly two El 6: it had two transformers, four motors instead of two, a Bo'Bo' instead of a Bo axle arrangement, two pantographs and the same speed, and it could haul twice the load. The first locomotives cost 52,090 kroner in 1911. Two of them passed to the Norwegian State Railways in 1920 as numbers 2501 and 2502, the others stayed with Norsk Transport until NSB El 1 replaced them in 1966, and number 2501 is kept at the Norwegian Railway Museum.