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In recent years, the structure of the energy industry has undergone several significant and transformative changes. At E-REDES, we keep our business at the forefront, always keeping up with social and business transformations, and presenting the best service options for each client.

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The medium voltage connection is intended more for companies with power needs above 200 kVA, such as the automotive, metallurgical or hotel industry. 

Request for connection of your premises in medium voltage (MV)

In order to start the process of connecting your facility to medium voltage (MV), you must first assess whether the technical supply conditions are met.

This will require a request for network connection conditions, which can be made by filling in the form available here.

After reviewing the request, you will receive information on how to proceed.


Note: The medium voltage connection is established to electrical networks with a voltage level of 10 kV, 15 kV or 30 kV, depending on your geographical location.

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Budget simulation for connection to the medium voltage network

E-REDES provides a simulator to help you understand what is the estimated cost of connecting your company to the medium voltage network. Click on the card and make your simulation.

Electric Power Quality

E-REDES verifies the quality of electrical energy in the distribution network, carrying out monitoring in accordance with the Quality of Service Regulation. Click to find out more.

Transformer Station Maintenance

Click on the card and learn how you can apply for line consignment to perform off-voltage work at private transformer stations.

Connect to the Medium Voltage network

  1. To start the process of connecting your private installation to medium voltage (MV), you must first assess whether the technical supply conditions are met.

    This will require a request for network connection conditions, which can be made by filling in the form available on this page. 

    To submit your request for medium voltage network connection conditions, you will need the following documents:

    • Location with implementation of the land and location of the transformer substation - see here for an example of what is required.
    • Electrotechnical datasheet with single-line diagram - see here for an example of what is required.

  2. After receiving a reply to the request for network connection conditions by letter or e-mail, you may submit the request for a connection to your customer manager or by e-mail PLR.MT@e-redes.pt. E-REDES will send you information with the initial cost associated with the connection 15 business days after you have submitted your request.

    If you accept the amount of the initial cost and make the payment, the proof of which must be submitted to your customer manager or sent to PLR.MT@e-redes.pt, you will receive information on the following:

    • Quote for the project;
    • Expiration date of connection conditions and payment due dates;
    • Deadlines and technical options;
    • Information about the dimensions and technical characteristics of the connection;
    • Cost for shared use connection infrastructure.

  3. Upon acceptance of the conditions for connection and payment of the cost described in the quote, the connection to the network shall be carried out by E-REDES or by the requestor, according to the option you have chosen.

  4.  
    The power supply shall start after:

    •    grid connection implementation;
    •    settlement of grid connection cost;
    •    delivery of the work for which the applicant is responsible, where applicable;
    •    installation of metering equipment;
    •    authorisation from the land owners crossed by the power line;
    •    transfer to E-REDES of the plot of land where the switching station is located, where applicable;
    •    licensing, surveying and authorisation of the coming onstream by the Directorate-General for Energy and Geology (DGEG) of:
                o the premise of the applicant;
                o the grid connection infrastructure.
    •    the signing of an operating protocol;
    •    inspection of the interconnection protections, if any;
    •    electricity supply contracted with a supplier.

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