For the power supply of the whole Mariazell Railway and the region along the line, three 25 Hz multi-phase generators at the Wienerbruck power station were used with an apparent power of 6600 kVA. This accounts for the single-phase railway supply's apparent power of 4500 kVA. The equipment is driven by water from the Lassing and the Erlauf. The railway current generated at the Wienerbruck power station at 6.5 kV was partly fed directly into the power lines near the power station, and also partly stepped up to 27 kV to be transmitted to the substations at Kirchberg and Ober-Grafendorf. As a backup against power outages, a power station consisting of two diesel generators, each producing 420 kVA single-phase apparent power, was built at the "Alpenbahnhof" in St. Pölten.