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Type and origin
Power type Electric
Builder ASEA
Build date 1982
Total produced 1
 • AAR B-B
 • UIC Bo'Bo'
Gauge 1,435 mm (4 ft 8 12 in)
Length 15,520 mm (50 ft 11 in)
Loco weight 81 tonnes (80 long tons; 89 short tons)
Electric system(s) 15 kV 16 23 Hz AC catenary
Current source Pantograph
Performance figures
Maximum speed 160 km/h (99 mph)
Power output 4,000 kW (5,400 hp)

Rz was an electric locomotive built by ASEA to test out asynchronous motors. It was built in 1982 and closely related to the Rc-series. It was test run until 1989 on Siljansbanan, but there was never any mass production of it.

Later developments[edit]

After ASEA merged with Brown, Boveri & Cie to form Asea Brown Boveri in 1988 the development of asynchronous motors was moved to Switzerland. The Rz-technology was utilized for the development of the X2-train and the Rc5-locomotive.


In 1992 the engine was donated to the Swedish Railway Museum, but they were not particularly interested in it and in 1999 it was moved to Örebro to become a parts locomotive.