These evacuation units for turbine condensers help to increase the efficiency of steam turbines and thus make an important contribution to energy efficiency overall. Since the cooling water of power plants is taken from rivers and lakes, the temperature fluctuates depending on the season. This entails variable operating points of the turbine set, which must be taken into account by the vacuum systems for extracting the leakage air in the turbine condenser. This task is solved by the vacuum systems ZLR-N 945. Together with partners who took care of the necessary approvals and the acceptance of the vacuum systems, we were able to deliver 6 complete vacuum systems, 3 per power plant block.