Despite of its ET designation (marking a freight locomotive) ET22 is a universal locomotive, and it is occasionally seen in passenger traffic. Its maximum continuous power is and it is the biggest single-box Co-Co locomotive in PKP service. Technical features enable this engine to pull heavy freight trains of up to 3150 t with a speed of 70 km/h. Trains of up to 2700 t can be hauled at 80 km/h. When used as passenger locomotive it can pull trains weighing up to 700 t at 125 km/h. This is caused by several features and solutions based on passenger EU07 and EU06 locomotives.