Contens 3-2019
Science and Technology

Kamensky M.K., Cand. Sc. (Engineering), Deputy Division Director of OJSC VNIIKP;
Peshkov I.B., Dr. Sc. (Engineering), Professor, Chief Research Scientist of OJSC VNIIKP;
Shuvalov M.Yu., Dr. Sc. (Engineering), Division Director of OJSC VNIIKP
More about the use of silane-cured polyethylene for the production of medium-voltage power cables

The data concerning the production scale of MV cables insulated with peroxide-cured and silane-cured polyethylene (PE) in the post-Soviet states are presented. The latter type of cables meets the national standard GOST R 55025–2012 requirement for the dielectric strength in the initial state and after the two-year electrochemical ageing. It is shown also that water tree sizes in silane-cured PE after the 2-year wet ageing test meet the requirement of GOST R 55025-2012 and correspond to the values of peroxide-cured PE.
The unbiased results of the study and the tests, as well as the positive experience of commercial operation permit to make a conclusion that the application of 6-20 kV cables insulated with silane-cured PE in medium voltage grid is rightful.
Key words
Silane-cured polyethylene; peroxide-cured polyethylene; medium voltage cable; dielectric strength; electrochemical ageing; water tree.
Tretyakov M.V., Cand. Sc. (Economics), General Director of Ltd. Elkat
Contact: mtv@elkat.ru
The use of copper for the production of cable and wire products in Russia

The analysis of the existing Russian capacities for production of copper wire rod and their loading shows that in 2005 the installed capacity made 683 thousand tons, and loading made 87 %. In 2018 the installed capacity increased to 931 thousand tons, and the loading decreased to 46 %. In
recent years share of scrap in the production of wire rod has increased dramatically. In 2018 the share of wire rod, which is used in the production of scrap and waste, was 53 %. This led to a deterioration in the quality of the cable made from such wire rod, and the cable itself, being disposed of, turns into a «bad» copper scrap. Another problem is the tax risk associated with the optimization of the value added tax on the acquisition and processing of scrap and waste copper.
Key words
Installed capacity; cooper wire rod; scrap and waste; tax risk; economic loss.
Dyachkov K.A., Sales Manager Niehoff of Russia;
Shilkov F.V., Sales Manager, Maschinenfabrik NIEHOFF (Germany)

High-quality copper rod enables successful wire drawing and annealing

Drawing of copper wire, manufactured from copper scrap, leads to the reduction of production efficiency. Impurities are reducing the electrical conductivity of the wire and increasing the temperature of annealing. Production costs are growing accordingly. Market share of scrap copper in Russia is reasing. Recycling of copper scrap needs careful selection and purification before manufacturing of the cooper rod.
Key words
Copper rod; copper scrap; impurities; electrical conductivity of copper; drawing efficiency reduction; production costs increasing.
Demin M.S., Cand. Sc. (Physics and Mathematics), Assistant Professor of Automated Power Supply Systems of the Institute of Electric Power Engineering, FSAEI HE «The North-Caucasus Federal University»;
Morozova T.F., Cand. Sc. (Physics and Mathematics), Assistant Professor of Automated Power Supply Systems of the Institute of Electric Power Engineering, FSAEI HE «The North-Caucasus Federal University»
Analysis of the performance of XLPE-insulated power cable screen grounding systems

The authors analyze the specific performance of XLPE-insulated cables with different schemes of screen bonding and grounding. Based on the analysis results they suggest that three-core cables with sector-shaped conductors and a screen of thermal- and corrosion-resistant aluminum alloy should be considered as an alternative to single-core cables.
Key words
XLPE-insulated cable; grounding; screen; transposition; screen currents; single-phase and three-phase cables; neutral point connection.
Belyaeva N.S., Deputy Chairman of the Ecology Committee of the «Delovaya Rossia» business association;
Tretyakov M.V., Cand. Sc. (Economics), Vice-President of the Electrocable Association, Vice-President of the «Opora Rossii» committee, member of the Public Council of the RF Ministry of  Industry and Trade
Contact: mtv@elkat.ru
Extended liability of wire and cable producers and importers

The authors of the article justify the necessity of exclusion of Group № 40 (electrical cable and wire) from the List of finished products to be disposed in accordance with Law № 89-FZ «On production and consumption wastes».
Key words
Production and consumption wastes; extended liability of producer; disposal guidelines; environmental charge rates; Group № 40 of the List of finished products to be disposed.


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