Results 211 to 220 of about 44,255 (258)

Dielectric strength of mineral oils

Electrical Engineering, 1935
The correlation of the pressure and temperature effects in determining the dielectric strength of mineral insulating oils is considered in this paper. The effect which gas dissolved in the oil has on the dielectric strength of the oil is shown by experimental results of tests on the effect of temperature and pressure.
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Effects of dishomogeneities on the dielectric strength of real dielectrics

[1992] Proceedings of the 4th International Conference on Conduction and Breakdown in Solid Dielectrics, 2003
The local field set up by the inhomogeneities present in the dielectric matrix of power cable insulation is examined. A pure polymeric matrix is considered in AC regime, and the real local field set up by the presence of fillers or impurities is calculated by using a suitable mathematical model. On the hypothesis that the AC breakdown stress is closely
P. Anelli, F. Donazzi, R. Gaspari
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Dielectric strength and voltage life of polyethylene

Electrical Engineering, 1958
AMONG the most promising types of material for insulating high-voltage cables are those in the polyethylene family. Since its introduction around 1940, polyethylene has been used successfully for submarine telegraph and telephone cable, for high-frequency coaxial communication cable, and for multiconductor control cables.
G. H. Hunt, M. J. Koulopoulos, P. H. Ware   +2 more
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IV. Dielectric strength of polyethylene

Electrical Engineering, 1945
POLYETHYLENE is a particularly interesting material with which to study dielectric strength because of the remarkable uniformity of results obtainable, a characteristic which differentiates it from other dielectrics used for wires and cables. This uniformity, however, exists only if the material is free of mechanical stress.
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Study on Improvements to the Dielectric Breakdown Strength of Extruded Dielectric Cables

IEEE Transactions on Power Apparatus and Systems, 1985
This report relates to the study on insulation materials for obtaining extruded dielectric cables with high dielectric breakdown strength. Firstly, the dielectric breakdown strength (EB) of a variety of plastics was evaluated by the use of recessed sheet samples. As a result, the EB for high density polyethylene (HDPE) proved favorable.
Tohru Takahashi, Hidefumi Ohtsuka, Hajime Takehana, Toshio Niwa   +3 more
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The Apparent Dielectric Strength of Cables

Transactions of the American Institute of Electrical Engineers, 1923
AFTER reading with considerable interest, the two papers presented at the annual convention of the Institute, dealing with the dielectric strength of cables1, the writer analyzed the data presented in each paper from an entirely different viewpoint and also the data given in each paper according to the views of the other paper.
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Dielectric strength of the metal vapour

2008 23rd International Symposium on Discharges and Electrical Insulation in Vacuum, 2008
In vacuum circuit breakers (VCB) the presence of the metal vapour in the switching gap, following the interruption of high currents, is a source of limitation of dielectric performance during the recovery period. The temperature of the contacts is still high after current extinction, and metal vapour continues to evaporate from the contacts.
G. Sandolache, S. Rowe, S.-S. Ciobanu, D. Hong   +3 more
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Dielectric strength of impregnated pressboard

Electrical Engineering, 1953
THE IMPULSE dielectric strength of pressboard impregnated with insulating liquids is of interest where such insulation has to withstand high transient impulse voltages. A comparison of the impulse dielectric strength of dry pressboard impregnated with a variety of insulating liquids of differing chemical structure has indicated that, in pressboard ...
T. W. Dakin, C. N. Works
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The Law of Corona and the Dielectric Strength of Air

Transactions of the American Institute of Electrical Engineers, 1911
For several years an extensive investigation on the dielectric strength of air, and more particularly, on the law of corona, has been carried on by the Consulting Department of the General Electric Company, under the general supervision of Dr. C. P. Steinmetz.
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The dielectric strength of glass — An engineering viewpoint

Electrical Engineering, 1941
The purpose of this paper is to provide the engineer with co-ordinated information and data regarding the dielectric breakdown of glass which will permit him to apply this insulating material more effectively for high dielectric strength. In the discussion of the subject, particular attention has been paid to “edge effects” and other factors which ...
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