As part of the modernization of the 6 kV power supply grid of Izmailovo allotment association of the Egoryevsk urban district, specialists of the "Eastern Electric Grids" branch of "Rosseti Moscow Region" applied innovative self-supporting insulated wire of the SIP-3 ANVP brand (made of high-tensile non-heat-treatable aluminum alloy, ANVP) on a 13.6 km section of overhead line (OHL) for the first time.

During the reconstruction of the overhead line, the non-insulated wire of the A-70 brand was replaced with the SIP-3 ANVP 68/8 insulated wire, and the old wooden supports were replaced with new reinforced concrete ones.

The SIP-3 ANVP wire was used as part of the pilot testing of technical solutions by the winners of the Energoproryv-2021 International Contest of Innovative Projects and Developments in the Electric Power Industry, organized by PJSC "Rosseti" and the Skolkovo Foundation. The manufacturer of the SIP-3 ANVP wire is a domestic developer of solutions in the field of improving the reliability of power transmission lines of Metsbytservice LLC. Thus, the use of the SIP-3 ANVP wire corresponds to the course for the priority use of Russian equipment and components.

The alloy and the construction of the SIP-3 ANVP wire provide greater mechanical strength without increasing electrical resistance. Its application expands the possibilities of construction and reconstruction of overhead lines, reduces aerodynamic and vibration loads.

Compared with a traditional wire, the SIP-3 ANVP wire provides an 8% increase in strength, reduced load on supports due to the lower weight, reduced losses and improved power quality by reducing the resistance of the wire by 14%.

If the stated advantages are proved during the pilot operation, with further use of the wire due to increased strength, it is possible to increase the length of the overhead line span by 15% without increasing the load on the supports, compared with the traditional SIP-3 wire. This will reduce capital costs during the construction and operation of power transmission lines.