SCIENCE AND TECHNOLOGY
IDENTIFICATION OF THE CAUSE OF FAILURE IN SERVICE AND REMAINING
LIFE ASSESSMENT FOR A LOW VOLTAGE POLYETHYLENE INSULATED CABLE
V.V. Bannov, Cand. Sc. (Engineering), Deputy General Director, Technical Director of
JSC “Samara Cable Company”;
A.A. Kryuchkov, Cand. Sc. (Chemistry), Leading Research Scientist, OJSC VNIIKP;
T.A. Stepanova, Research Scientist, OJSC VNIIKP;
M.Yu. Shuvalov, Dr. Sc. (Engineering), Director of Research Area – Division Manager, OJSC VNIIKP
Abstract. The possible origin of the low voltage cable PE insulation cracking is considered, the cable has been 5 years in operation. The analytical methods used are as follows: DSC,FTIR, visual light microscopy, photomicrography, and photomacrography. In addition, insulated conductors were tested in surface- active substance at elevated temperature. The data obtained permit to conclude that neither oxidation, nor rearrangement of supramolecular structure are responsible for premature failure. It is concluded that installation work is the only reason of the damage. The residual life time estimation, based on cracking criteria, equals to 40 years.
Key words: PE insulation, crack, DSC, FTIR, visual microscopy, photomicrography, photo-macrography, oxidation, recrystallization.
PHYSICAL BASIS OF EXPLOSIVE GASEOUS OR DUST ATMOSPHERE EXPLOSION
INITIATED BY ELECTRICAL CABLES
V.V. Bychkov, Leading Specialist, Ltd. “NPP “Spetskabel”;
A.S. Zalogin, Cand. Sc. (Engineering), General Director of Ltd. “NANIO CCVE”;
A.V. Lobanov, Cand. Sc. (Engineering), General Director of Ltd. “NPP “Spetskabel”;
A.P. Porshina, Engineer, Ltd. “NANIO CCVE”
Abstract. The formula for calculating the risk of damage caused by an explosion of gas or dust atmosphere in hazardous areas at industrial sites has been examined. The analysis of international electrotechnical vocabularies and regulatory documentation relating to electrical equipment for explosive atmospheres has demonstrated that by assessing the risk of explosion in hazardous areas of industrial production sites, it is important to consider the likelihood of explosions of gas or dust atmospheres caused by electrical cables for external electrical circuits. The physical basis of explosive atmospheres ignition probability during the operation of cables for external electrical circuits has been analyzed and the formula for calculating the risk of damage caused by explosion of gas or dust atmospheres in hazardous areas at industrial sites has been revised, taking into account the probability of an explosion caused by electrical cables for external electrical circuits.
Key words: risk, probability, explosive atmosphere, explosion initiation, electrical cables for external electrical circuits, exhaustive events.
THE NATURE OF CHANGES OF THE MAGNETIC FIELD STRENGTHS
IN THE SURROUNDING OF LOW-VOLTAGE THREE-PHASE CABLES
V.M. Barinov, Assistant Professor of FGAOU DPO “St. Petersburg Energy Institute of Advanced Training” (PEIAT), Honored Specialist in Energetics of the Russian Federation;
A.V. Saltykov, Cand. Sc. (Engineering), Assistant Professor of Computing and Information Technology Department of St. Petersburg State Maritime Technology University;
V.M. Saltykov, Dr. Sc. (Engineering), Professor, Honored Worker of Higher Education of the Russian Federation, Full Member (Academician) of the International Academy of Ecology and Life Protection Sciences (IAELPS)
Abstract. The behavior of magnetic field strengths in the external environment is shown, and the analytical expressions for the determination of their maximum values are given to be used in further estimation of their permissibility under electromagnetic safety and compatibility conditions.
Key words: low-voltage three-phase cables, magnetic field strength, electric power supply system, electromagnetic safety and compatibility.
INSTALLATION OF 500 kV CABLE LINES WITH POLYETHYLENE INSULATED CABLES
AT BUREISKAYA HEP, ZAGORSKAYA PSPP, BOGUCHANSKAYA HEP, 500 kV AERIAL
CABLE LINE “ZAPADNAYA” SUBSTATION – “OCHAKOVO” SUBSTATION
A.V. Grin’, Leading Design Engineer, Ltd. “Estralin PS”;
A.S. Mneka, Technical Director of Ltd. “Estralin PS”
Abstract. 500 kV cable lines (CL) with polyethylene insulated cables have been installed in Russia since 2004. Designing, installation and testing of such cable lines are associated with some specific features. The article presents the generalized experience of installation of 500 kV cable lines with polyethylene insulated cables at Bureiskaya HEP, Zagorskaya PSPP, Boguchanskaya HEP, 500 kV aerial cable line “Zapadnaya” substation – “Ochakovo” substation.
Key words: 500 kV cable lines, 500 kV polyethylene insulated cables, installation of 500 kV cable lines.
SIKORA's PURITY CONCEPT X GUARANTEES FULLY FUNCTIONAL PRODUCTS
THE USE OF THERMAL GRAVIMETRIC ANALYSIS FOR QUALITY CONTROL OF
MATERIALS USED IN CABLE AND WIRE PRODUCTION
A.A. Ivonin, Chief Specialist for power cables, JSC “NIKI Tomsk”
RESEARCH AND PRACTICE CONFERENCE: “ELECTROPROVOD” PLANT CELEBRATES
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