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Connecting Elektrilevi OÜ to Mustamäe 110/6 kV substation


Civil engineering

Energy supply

Concrete works


Description of work




The renovation of the Mustamäe substation was part of a major joint project between Elering and Elektrilevi to satisfy the growing energy needs in the Mustamäe and Õismäe district and increase the reliability of supply.

A new 110 kV Elering substation was built next to the 6 kV Elektrilevi substation already standing on Vilde tee in Tallinn on the turnkey principle. In the course of the work, H-configured 110 kV external switchgear, a new control building and an access road were designed and built for the substation. A building with a lightweight structure was built enclosing the substation equipment, which was a first for Estonia, to make the high-voltage substation better suited to an urban environment. The new Mustamäe district substation supplies electricity to over 15,000 households and institutions, including the North Estonia Medical Centre complex and a number of kindergartens and schools.

The location of the substation in fairly tight confines between residential buildings required exacting precision in the design, construction and execution of the electrical work.

On 1 July 2021, Merko Ehitus Eesti acquired a stake in Connecto Eesti, and the Merko electrical construction business line merged with Connecto. Acting jointly under the Connecto brand makes it possible for us to offer a significantly broader range of services – in addition to the design, construction and maintenance of low, medium and high voltage electricity networks, Connecto also operates in the field of telecommunications and gas networks.

View the works performed by Connecto.

Elering AS
Name of the project:
Connecting Elektrilevi OÜ to Mustamäe 110/6 kV substation
Energy supply
Type of construction:
AS Merko Infra and AS Merko Ehitus Eesti
Description of work:
New building
Vilde tee 92 a, Tallinn
Beginning of the project:
Year of completion:

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