There are 81 Elering AS substations, including seven 330 kV and seventy four 110 kV substations in our service area (see the picture below).

Maintenance of substations includes periodic maintenance, repair and removal of faults of primary and secondary equipment. We have the technology and the training of fluorinated gas-filled electrical equipment maintenance, as well as the maintenance of oil-filled equipment. We also provide 110-330 kV power transformer maintenance and extended maintenance, which includes replacement of components and auxiliary equipment. In addition we provide switching operations service with 24/7 readiness under the orders and guidance of the Elering Control Centre.