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NSB El 7
RjB.1 at the Norwegian Railway Museum
Type and origin
Power type
Electric
Builder
AEG Skabo
Build date
1911–1918
Total produced
6
Specifications
Configuration:
• AAR
B-B
• UIC
Bo'Bo'
Gauge
1,435 mm (4 ft 8+1⁄2 in)
Length
7.3 m (23 ft 11 in)
Loco weight
48 t (47 long tons; 53 short tons)
Electric system/s
Catenary 10 kV 16 ⅔ Hz AC, 15 kV 16⅔ Hz AC
Current pickup(s)
Pantograph
Traction motors
4
Performance figures
Maximum speed
45 km/h (28 mph)
Power output
368 kW (493 hp)
Career
Operators
Norsk Transport Norwegian State Railways
Numbers
RjB.1–3, 6–8 NSB 7 2501 - 7 2502
Locale
Rjukanbanen
Retired
1956
Current owner
Norwegian Railway Museum
NSB El 7 was a series electric locomotives delivered between 1911 and 1918 to Norsk Transport that operated the Rjukan Line and the Tinnoset Line, where they were designated RjB.1, 2, 3, 6, 7 and 8. The locomotives were built by AEG (motor) and Skabo (chassis).[1]
The first three locomotives were delivered to the Rjukan Line along with two smaller units, RjB 4 and 5 (which were given the designation El 6 by NSB). El 7 is exactly two El 6; it has two transformers, four motors instead of two, Bo'Bo' instead of Bo axle arrangement, two pantographs, the same speed, and could haul twice the load. The locomotives cost NOK 52,090 in 1911.[1][2]
The preserved 7.2501El 7-hauled train at Tinnoset Station in 1911
When two of the locos (no. 1 and 3) were transferred to Norwegian State Railways in 1920 after NSB took over the Tinnoset Line, where they were designated El 7 and numbered 2501 and 2502. Number 1 was sold back to Norsk Transport in 1932 while number 3 was transferred to Narvik in 1927 after it had been converted from 10 to 15 kV. It returned to Drammen in 1936 and remained there until it was taken out of service in 1956; RjB 6 was retired in 1960, the rest remained in service with Norsk Transport in 1966 when they were replaced with NSB El 1 (given numbers 14 and 15). No. 2501 is retained at the Norwegian Railway Museum.[1][2]
^ abcPayton, Gary & Lepperød, Trond (1995). Rjukanbanen; på sporet av et industrieventyr (in Norwegian). Rjukan: Mana Forlag. p. 187. ISBN 82-993549-1-9.
^ abAspenberg, Nils Carl (2001). Elektrolok i Norge (in Norwegian). Oslo: Baneforlaget. pp. 62–65. ISBN 82-91448-42-6.
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