Our network

Our engineers and technicians are entrusted with the development, maintenance and operation of the national grid which distributes electricity from different sources of power to all our customers in the Maltese Islands.

Electricity is transmitted from the Delimara Power Station, the Malta-Italy Interconnector Terminal Station in Magħtab and from several grid-connected renewable energy sources located in different parts of the country to our customers through a four-level network with four different voltage levels, 132 kV, 33 kV, 11 kV and 400/230 V. Through this system we seek to distribute electricity to all our customers across the country with the minimal technical losses. The frequency of the supply of electricity in Malta is 50 Hz.

Electricity from the Delimara Power Station and the Magħtab Terminal Station is distributed to four 132 kV distribution centres (primary substations), two at Marsa and one in Kappara and Mosta, through 110 kilometres of underground 132 kV cables. At these centres, voltage is stepped down to 33 kV so that electricity can be channeled to another 21 33 kV distribution centres (primary substations), 18 in Malta, two in Gozo, one in Comino. This part of the network includes 340 kilometres of 33 kV underground cables and 13 kilometres of 33 kV underwater cables.

Each 33 kV distribution centre feeds a number of 11 kV circuits, mostly in radial configuration, supplying over 1,580 11 kV substations (secondary substations). This part of the system includes 1,134 kilometres of underground 11 kV cables as well as another few kilometres of overhead high voltage lines, mostly in rural areas. Where possible, we are phasing out overhead high voltage lines and replacing them with underground cables, which are less prone to storm damage and other difficulties.
In our 11 kV secondary substations, electricity is stepped down to 400/230V to supply our customers’ properties, including residences, businesses and other buildings, through a low voltage three-phase four-wire network of underground cables and overhead lines.

The technical levels of our electricity services are specified in our Customer Charter.

National Grid
NETWORK CODE