Transmission System Operation & Control Department

Due to necessary maintenance works in the Transmission System and specifically in Circuit 400kV HVSS AG. STEFANOS (813,833) - HVSS PALLINIS (913,893), from 07:00 on Wednesday 20/09/2023 to 17:00 on Saturday 07/10/2023 (continuous outage) and in Circuit 400kV HVSS AG. STEFANOS (853) - HVSS PALLINIS (873) daily during 07:00-17:00 from 20/09/2023 to 25/09/2023, constraints may be imposed that could affect the unit production in the area.

We inform you that after the justified request of producer PPC S.A., the annual maintenance of Gas Turbine 2 of thermal unit Lavrio 4, is extended till 04/06/2023.

We inform you that after the justified request of producer PPC S.A., maintenance works will be conducted in thermal unit Aliveri 5, from 03/06/2023 to 08/06/2023.

We inform you that after the justified request of producer HERON S.A. the Heron 1, Heron 2 and Heron 3 thermal units annual maintenance schedule is modified as follows:

• Heron 1: 23/09/2023 to 07/10/2023
• Heron 2: 20/03/2023 to 22/03/2023
• Heron 3: 23/03/2023 to 25/03/2023

We inform you that after the justified request of producer PPC S.A., the initiation of the annual maintenance of thermal unit Komotini GT2, is temporarily postponed. New maintenance period from 27/04/2023 to19/05/2023.

We inform you that after the justified request of producer PPC S.A., the annual maintenance of thermal unit Meliti, is extended till 08/11/2022.