Professionals Account Professionals in the electricity sector are the spokespersons of our activity. Technical information Safety Documentation and Technical Drawings Normative Documents Low voltage installations /en/connecting-low-voltage-premises Medium voltage installation /en/medium-voltage-power-connection High-voltage installations /en/high-voltage-premise-connection Learn more Grid connection manual Learn about the main procedures for connecting installations to the public netwo https://www.e-redes.pt/pt-pt/media/manual-de-ligacoes-rede-202110-edicaopdf-0 High voltage distribution grid Check here Suppliers recognition Learn more Maintenance of transformation sub-stations Learn more Data Measuring, Reading and Availability Guide Check here