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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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Breakdown strength of nitrogen at high temperatures
Electrical Engineering, 1961IN A-C circuit-interrupting devices, the post-arc period immediately after current zero is of paramount importance. This period is characterized by the rapid cooling and deionization of the hot gases between the contacts, which build up the dielectric strength of the gap.
A. H. Sharbaugh +4 more
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Dependence of the breakdown strength on thickness and permittivity
2013 IEEE International Conference on Solid Dielectrics (ICSD), 2013The dielectric breakdown strengths of Al2O3 and BaTiO3 ceramics have been investigated in terms of thickness and permittivity dependence. From the obtained results, it is possible to define a thickness dependent breakdown strength regime. For bulk samples it will be shown, that the breakdown strength is inversely proportional to the permittivity ...
Neusel, Claudia, Schneider, Gerold A.
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Effect of acetophenone on the breakdown strength of polyethylene
2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM), 2015With the wide application of high voltage and ultra-high voltage cross-linked polyethylene (XLPE) insulated cables and the increasing demand for operation stability, development of XLPE insulation materials with high dielectric strength has become one of the most popular research topics in recent years.
Chunyang Li +4 more
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Enhancement of breakdown strength of polyetherimide laminates
Proceedings of IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP '93), 2002The breakdown strength of polymer laminates, polymer base films coated with thin layers of polyvinylidene fluoride (PVDF), was investigated. The PVDF film was coated using a spin coating technique. The DC breakdown strength was studied using an ASTM standard and could be increased by as much as 20% for the polyetherimide laminates.
J.P. Zheng, P. Cygan, T.R. Jow
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1983
Solid dielectrics are universally employed throughout the electrical industry as both insulators and charge storage media. Although much research on dielectrics has been aimed at improving insulation for high-voltage equipment in the power industry, there are numerous other applications for which a fundamental understanding of the mechanisms of ...
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Solid dielectrics are universally employed throughout the electrical industry as both insulators and charge storage media. Although much research on dielectrics has been aimed at improving insulation for high-voltage equipment in the power industry, there are numerous other applications for which a fundamental understanding of the mechanisms of ...
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The breakdown mechanism of poly-p-xylylene film. Prestress effects on the breakdown strength
IEEE Transactions on Dielectrics and Electrical Insulation, 1994Impulse and dc breakdown strengths of 4 /spl mu/m thick poly-p-xylylene (PPX) films were 5.9 and 4.1 MV/cm, respectively. They were independent of temperature in the temperature range from /spl minus/60 to 60/spl deg/C. dc prestressing for a long time (t/sub p/=60 s) reduced impulse breakdown strength for both the same and the opposite polarity. But dc
T. Mori, T. Matsuoka, T. Mizutani
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