NSB El 7

NSB El 7
RjB.1 at the Norwegian Railway Museum
Power type	Electric
Builder	AEG Skabo
Build date	1911–1918
Total produced	6
AAR wheel arr.	B-B
UIC classification	Bo'Bo'
Gauge	1,435 mm (4 ft 8 1⁄2 in)
Length	7.3 m (23 ft 11 in)
Locomotive weight	48 t (105,800 lb)
Electric system	15 kV 16⅔ Hz AC
Current collection method	Pantograph
Traction motors	4
Top speed	45 km/h (28 mph)
Power output	368 kW (493 hp)
Career	Norsk Transport Norges Statsbaner
Number	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 Rjukanbanen and Tinnosbanen, 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 Rjukanbanen 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]

When two of the locos (no. 1 and 3) were transferred to Norges Statsbaner in 1920 after NSB took over Tinnosbanen, 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]

References

1. ^ ^{a b c} Payton, Gary and Lepperød, Trond (1995) (in Norwegian). Rjukanbanen; på sporet av et industrieventyr. Rjukan: Mana Forlag. pp. 187. ISBN 82-993549-1-9. 
2. ^ ^{a b} Aspenberg, Nils Carl (2001) (in Norwegian). Elektrolok i Norge. Oslo: Baneforlaget. pp. 62–65. ISBN 82-91448-42-6. 

External links

• Jernbane.net entry on the El 7