The Smart Metering and Smart-Grid Distribution Modernization Programme is a national electricity-sector modernization initiative led by the Société Tunisienne de l'Électricité et du Gaz (STEG) for Tunisia's power network distribution through introducing smart meters, digital. The Smart Metering and Smart-Grid Distribution Modernization Programme is a national electricity-sector modernization initiative led by the Société Tunisienne de l'Électricité et du Gaz (STEG) for Tunisia's power network distribution through introducing smart meters, digital. In this paper, we were interested in the harmonization of the protection plan settings in order to ensure a perfect selectivity and a better continuity of service on the whole of the network. Keywords—Distribution network Gabes-Tunisia, NEPLAN©DACH, protection plan settings, selectivity. The study focuses on harmonizing protection settings in Tunisia's medium voltage distribution. E3 International (E3I) has successfully completed the Factory Acceptance Testing (FAT) of a new Fault Location, Isolation, and System Restoration (FLISR) system. The testing took place from October 29–31, 2025, marking a major milestone in E3I's collaboration with Tunisia's national electricity and. Tunisia needed to scale up its electricity distribution network to meet increasing demand for energy from industries and enterprises, as well as from a larger consumer base. It constructed and rehabilitated over 3,000 kilometres of medium tension lines. This contributed to reducing network failure. In 2014, STEG operates a 6 209 km of transmission network distributed as follows : In addition to their function to meet a perpetual growing demand, the new works will allow us to minimize the risks of obsolescence and to prepare our network to play its role as a link in a large system.