Study, supply, and installation of two conversion stations and one substation for the high-voltage direct current (HVDC) interconnection between Crete and Attica (2 × 500 MW)
"Production of vacuum (-1 mbar) using a certified vacuum pump on seven (7) transformers, 187 MVA, single-phase 400/3 / 290 kV, by SIEMENS, at the Kumoundourou Conversion Station, in accordance with the manufacturer’s procedure.