Cuba restored electricity across its western region early Sunday after a partial grid failure caused by faults on high-voltage transmission lines. Cuba restored its National Electric System across the western region after a partial transmission failure caused widespread power outages. Photo: @OSDE_UNEElectricity service resumed early Sunday after a transmission fault caused widespread outages across western Cuba. Cuba restored its National Electric System (SEN) across the country’s western region early Sunday after a partial grid failure triggered widespread power outages, the state-run Electric Union (UNE) said. Electricity System Restored in the western part of the country.