181 (E310)
15kV, 16-2/3Hz + 25kV, 50Hz
At first, 4 locomotives of class 181.1 were built on a trial basis. In 1974 and 1975, 25 locomotives of class 181.2 were built. Class 181.2 was based on class 181.1, but many improvements were made.
The length of class 181.2 is 17,940mm, power output 3,200kW, max speed 160km, and wheel arrangement Bo-Bo.