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The breakdown strength of commercial polyethylene
1956 Conference on Electrical Insulation, 1956Most available dielectric strength data for polyethylene apply to laboratory-prepared specimens that have been tested with very special electrodes under highly artificial test conditions. This paper reports certain of the results of extensive impulse tests performed on commercial polyethylene with plane electrodes that approximate the conditions found ...
C. R. Vail, W. F. Gaustex
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Oxidation dependence of breakdown strength of XLPE
Conference on Electrical Insulation and Dielectric Phenomena, 2003It has been shown in a previous study (P. Rohl, 1982) that the breakdown strength of polyethylene increases with increasing oxidation levels. The purpose of the research reported here is to verify this somewhat surprising result. Unlike the earlier work, cross-linked polyethylene (XLPE), the principal insulation used in extruded cables, is utilized ...
G. Gagnon, S. Pelissou, M.R. Wertheimer
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ACS Applied Polymer Materials, 2023 The inferior breakdown strength of epoxy resin (EP) is one of the greatest barriers which restricts the evolution of advanced electrical equipment and electronic devices.
Mingru Li, Kai Shang, Jiuhui Zhao
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Effect of the insulator size on the breakdown strength
IEEE 1997 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2002The effect of the specimen size (S) on the dielectric strength E/sub Bb/ is a well known effect that exists whatever the breakdown type: pure vacuum, flashover, bulk breakdown. Eb varies as S/sup -n/. S can be the insulator surface in case of flashover or the insulator thickness in case of bulk breakdown.
G. Damamme, C. Le Gressus
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Breakdown-Strength Enhancement of Coaxial-to-Waveguide Adapters
Journal of Communications Technology and Electronics, 2021An improved structure of a high-power adapter is proposed for broadband matching of coaxial transmission lines and rectangular waveguides with a narrow side wall that are network used in space communication systems. Numerical simulation and optimization of such a microwave two-port are performed with the aid of the finite-element method in a frequency ...
V. V. Komarov +2 more
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Dielectric breakdown strength in magnetic fluids
physica status solidi (b), 2003AbstractThe application of an external magnetic field on the magnetic fluids induces needle like structuralization of magnetic particles. The influence of this aggregation of magnetic particles in an external magnetic field H on the magneto‐dielectric behaviour and dielectric breakdown strength of a transformer oil based magnetic fluids was measured ...
P. Kopčanský +7 more
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Nonsustained Breakdowns in Electrical Strength Tests
IEEE Transactions on Power Apparatus and Systems, 1966A study of nonsustained breakdowns has been made during alternating voltage tests on the electric strength of various commercial insulants in transformer oil and compressed sulphur hexafluoride and nitrogen. Such breakdowns do not cause sustained arcing and current flow.
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Impulse breakdown strength of irradiated LDPE
ICSD'01. Proceedings of the 20001 IEEE 7th International Conference on Solid Dielectrics (Cat. No.01CH37117), 2002The influence of structural inhomogeneities artificially generated by a beam of accelerated protons on the LDPE breakdown under an impulse voltage was investigated in this paper.
O.S. Gefle +4 more
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On the breakdown strength of silicone rubber
IEEE Transactions on Dielectrics and Electrical Insulation, 1994Polymeric materials are an alternative to porcelain and glass regarding outdoor HV insulators. Silicone rubber appears to be one of the main candidates to replace porcelain and glass. Although much work has already been done regarding the behavior of complete polymeric insulators in the laboratory and in the field, relatively little is known with ...
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Studies on the improvement of breakdown strength of polyolefins
IEEE Transactions on Electrical Insulation, 1993Breakdown tests were conducted on a variety of polyethylenes and polypropylenes. High density polyethylene (HDPE) and polypropylene random copolymers (PPR) exhibited the highest breakdown strengths among the examined polyolefins. Model cables insulated with HDPE and PPR were manufactured, and the impulse breakdown strength of the HDPE cables made under
T. Niwa +3 more
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