Portfolio

High-voltage lines

Construction of double-circuit 330 kV overhead line – 9.8 km. The scope of the design and construction work encompassed the following: clearing the corridor of trees and brush, construction of access roads, building the foundations and erection of 30 free-standing pylons. Line cables: 2x3x3x402/52 mm2 and 2 x OPGW -9.8 km assembly works. In addition, a OPGW was installed from the new line’s branch mast to Sindi substation – a total of 19 km and fibre-optic entries to the substation were built.

Renovation of 110 kV overhead line and double-circuit 110 kV overhead line in connection with the TLN ring road renovation. In the course of the design and construction, four freestanding anchor mast foundations were built and new masts were installed, new line conductors were assembled on the cross-fields, existing line conductors and OPGW were connected to the new masts.

Design and renovation of the catenary electrical network for the tram tracks between Mere puiestee and Kopli depot, dismantling the existing catenary network (6.5 km).

Replacement of conductors and lightning protection cables, replacement of reinforced concrete masts (10), repairs to the steel masts (10), installation of new steel mast (1), 11.4 km.

Replacement of Veskimetsa – Endla 110 kV overhead line with buried line, 4.2 km.

Replacement of Järve-Endla overhead line L113 between Järve 35-Tulika street in Tallinn with 110 kV buried cable.

Carrying out planned and unscheduled maintenance to 110-330 kV overhead and buried lines and detecting fault locations and eliminating the faults.

Design and construction of 110 kV buried cables between Volta-Elektrijaama-Ranna substations, disassembly of existing oil cables. Volta substation (Tööstuse 52E)-Ranna substation (Gonsiori 2A) 3.5 km; Volta substation-Elektrijaama substation (Põhja pst. 31) 2.3 km; Elektrijaama substation-Ranna substation 1.2 km.

High-voltage substations

Design of general construction and electrical system. Construction of control building. General construction work on the lot of 110 kV external switchyard. Supply and installation of 110 kV external switchyard equipment. Supply and installation of secondary equipment. Connecting, configuring and testing primary and secondary connections of installed equipment.

Design of general construction and electrical system. Construction of switchyard and transformer bath. Supply and installation of 110/6 kV 6.3 MVA transformer. Supply and installation of new 6 kV switchgear section. Installation of 6 kV cable between underground and aboveground switchgear. Connecting, configuring and testing primary and secondary connections of installed equipment.

Design of general construction and electrical system. Construction of switchyard building. Supply and installation of new 35/10 kV switchgear. Supply and installation of secondary equipment. Connecting, configuring and testing primary and secondary connections of installed equipment.

Installation and establishing connections for primary and secondary equipment in 130 kV external switchyard equipment. Laying 130 kV buried cables.

General construction work on the lot of 130/40 kV external switchyard. Installation and establishing connections for primary and secondary equipment in 130/40 kV external switchyard equipment. Installation of 130/40 kV transformer.

Installation of motorised 330 kV earthing switches in Balti substation (2 sets), Harku substation (2 sets), Kiisa substation (2 sets) and Püssi substation (3 sets), a total of 9 three-phase sets.

Design of general construction and electrical system. Construction of switchyard building. Supply and installation of new 35/10 kV switchgear. Supply and installation of secondary equipment. Connecting, configuring and testing primary and secondary connections of installed equipment.