The Hessenberg substation forms part of the southern region and operates at the high-voltage level of 220 kV. The substation acts as a base for the maintenance personnel working on the substations in Hessenberg, Kainachtal, Weißenbach, Oststeiermark, Zeltweg and Mellach as well as for the southern overhead line team. The 220-kV outdoor switching station is located on a 7-hectare site which also houses operational building facilities with emergency power supply equipment.
The substation is situated within the municipal area of St. Peter-Freienstein (close to Leoben) and was constructed between 1940 and 1943 and has been upgraded several times in the years since. Due to its age, the 110-kV outdoor switching station was dismantled in 2019 and a new 110-kV gas-insulated switching station was constructed in its place and brought into service by Energienetze Steiermark.
The substation is responsible for distributing electrical power from Austria’s trans-regional transmission grid in line with demand as well as supplying and supporting the regional distribution grids.
The southern overhead line team is in charge of managing the high-voltage overhead lines in the region, ensuring that they are operating properly as well as carrying out maintenance work and remedying any faults.
Werk Hessenberg 11
8792 St. Peter-Freienstein, Austria
The Hessenberg site regularly trains apprentices as technicians as part of a combined electrical engineering/metalworking programme. The apprenticeship lasts four years.