“CABLE AND WIRES” JOURNAL - 2025 #5
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SCIENCE AND TECHNOLOGY
DOI: 10.62994/2072-215X.2025.5.1.001
APPLICATION OF THE FRACTOGRAPHY OF POLYMER MATERIALS IN THE FAILURE ANALYSIS OF CABLES
D.S. Zaitseva, Research Scientist, JSC VNIIKP;
A.A. Kryuchkov, Cand. Sc. (Chemical),Senior Research Scientist, JSC VNIIKP;
A.S. Pronin, Head of Laboratory, JSC VNIIKP;
T.A. Stepanova, Research Scientist, JSC VNIIKP;
M.Yu. Shuvalov, Dr. Sc. (Engineering), Department Manager – Director of the Research Area, JSC VNIIKP, full member of the Academy of Electrotechnical Sciences of the Russian Federation
Abstract. The experience of using fractography to study the causes of mechanical destruction of a cable sheath made of high-density polyethylene is described. The combination of analysis of photographs of the rupture surface and the inner surface of the sheath, performed by different methods (photomicrography, photomacrography, macrophotography) and differential scanning calorimetry made it possible to determine the causes of cracking – recrystallization, defects on the sheath inner surface due to the design of the cable and the internal mechanical stresses of technological origin.
Examples of analysis of cracks in filled polymers, as well as of the early stages of fracture development in polyethylene are presented. It is noted that fractography is applicable for studying not only mechanical, but also electrical destruction and electrochemical ageing of polymer insulation.
Key words: fractography, polyethylene, photomicrography, photomacrography, differential scanning calorimetry, microcrack, water treeing, electrical treeing, breakdown, mechanofractography, electrofractography
DOI: 10.62994/2072-215X.2025.5.1.002
CALCULATION OF CURRENT MARGIN OF WIRE PROTOTYPES BASED ON HTSC-2 TAPES FOR THE NEW GENERATION EMS
S.S. Fetisov, Dr. Sc. (Engineering), Head of Department, JSC “VNIIKP”;
V.V. Zubko, Dr. Sc. (Engineering), Chief Research Scientist, JSC “VNIIKP”;
S.J. Zanegin, Cand. Sc. (Engineering), Head of Division, JSC “VNIIKP” ;
D.S. Kaverin, Cand. Sc. (Engineering), Deputy Head of Department, JSC “VNIIKP”
A.A. Mednikov, Head of Department, JSC “NIIEFA”
Abstract. This paper presents the results of current margin calculations for prototype second-generation high-temperature superconducting (2G HTS) wires, which are designed for the windings of controlled thermonuclear fusion devices and are rated for currents of 50 kA and above. For instance, a prototype central solenoid for a tokamak with reactor technologies (TRT) requires conductors with an operating current of approximately 60 kA at temperatures between 4.2 K and 20 K.
The prototypes can fabricated using 2G HTS tapes produced by the Russian company S-Innovation and were designed to be tested in their self-magnetic field. The calculations demonstrate that such prototypes can be successfully manufactured using 2G HTS tapes with standard critical current performance.
Key words: electromagnetic system, high-temperature superconductors, HTSC wire, HTSC-2 tapes
DOI: 10.62994/2072-215X.2025.5.1.003
STUDIES OF THE PROPERTIES OF RIN INSULATION OF HIGH-VOLTAGE INPUTS
A.V. Dolgov, Leading Engineer of the Department of Physics and Technology of Electrotechnical Materials and Components of the National Research University "MEI";
S.V. Serebryannikov, Dr. Sc. (Engineering), Professor of the Physics and Technology of Electrotechnical Materials and Components Department National Research University "MEI";
S.S. Serebryannikov, Cand. Sc. (Engineering), Associate Professor of the Physics and Technology of Electrotechnical Materials and Components Department National Research University "MEI";
A.Z. Slavinsky, Dr. Sc. (Engineering), General Director of the Izolyator Group of Companies, Head of the Department of Physics and Technology of Electrotechnical Materials and Components at the National Research University "MEI";
E.D. Sibirev, 1st Category Engineer of the Department of Electromechanical Devices, Mosmetrostroy JSC
Abstract. The results of studies of a number of properties of samples of modern internal RIN insulation of high-voltage inputs made on the basis of a non-woven material impregnated with epoxy resin are presented. The following properties of the insulation were investigated: the compound thermal conductivity in the range of (50–150) °C, arc resistance and tracking resistance. The research methods and the testing equipment used are described.
Key words: high-voltage inputs, internal insulation, RIN insulation, thermal conductivity, arc resistance, tracking resistance
INDUSTRY NEWS
R.E. Vasiliev, Cand. Sc. (Engineering), Full Member of the Academy of Electrotechnical Sciences of the Russian Federation, Deputy Director General, JSC VNIIKP, general manager, JSC Electroprovod;
A.A. Meshalkin, Leading Specialist for IEA, JSCcl. Trade House of VNIIKP
AWCCA 2025 GENERAL ASSEMBLY: RESULTS AND OUTCOMES
N.V. Sakharova, General Director of the Electrocable Association
THE 87rd GENERAL MEETING OF THE PARTICIPANTS OF THE ECTROCABLE ASSOCIATION
THE I.B. PESHKOV FOUNDATION FOR THE SUPPORT OF THE CABLE INDUSTRY DEVELOPMENT PROGRAMS SUMMARIZED THE RESULTS OF THE COMPETITIONS
A LARGE FORUM OF THE SCIENTIFIC COMMUNITY IN THE FIELD OF PHOTONICS
RESULTS OF THE MEETING OF THE «TELECOMMUNICATION CABLES» SECTION OF THE ELECTROCABLE ASSOCIATION IN KALININGRAD
ANNIVERSARIES
A.B. BLAVATSKY CELEBRATES HIS 50th BIRTHDAY
