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Electrical Insulation, IEEE Transactions on

Issue 4 • Date Nov. 1968

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Displaying Results 1 - 9 of 9
  • Table of contents

    Page(s): c1
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  • Field of Interest

    Page(s): 89
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  • Editorial

    Page(s): 90
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  • Pulse-Discharge Losses in Oxygen

    Page(s): 91 - 95
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    Pulse-discharge loss in oxygen was studied between metallic electrodes under ac stress at atmospheric pressure, and it was found to be a linear function of both the applied voltage and discharge rate. This linear dependence resulted, in part, directly from the quasi-linear variation of the discharge rate with applied voltage. Over the spark-gap lengths extending from 0.10 to 0.50 mm, the pulse-discharge loss increased linearly with the gap length. View full abstract»

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  • Experimental Results with Vacuum Drying of Thick Soft Paper Insulation

    Page(s): 96 - 105
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    The objective of the work reported in this paper was to study the influence of the thickness of the paper mass and of the inner temperature distribution on the vacuum drying process; particularly to study the ways in which these two factors affect the quantitative distribution of residual moisture perpendicular to the layers of the paper. The quantitative distributions of residual moisture perpendicular to the layers in soft paper masses 0.3 to 2.4 cm thick were determined. The results show that both the magnitude and distribution of temperature throughout the paper affect the degree of drying. Neither a low vacuum nor a prolonged drying time will compensate for an unfavorable temperature distribution. The magnitude and distribution of temperature predominate over the effect of paper thickness. With unfavorable temperature conditions, paper only 0.6 cm thick will retain an excessive amount of moisture. With favorable temperature conditions, paper 2.4 cm thick can be dried under vacuum to an acceptable moisture content. The upper limit of residual moisture content for transformer insulating paper that can reasonably be expected to be achieved is about 0.5 percent, not 0.1 percent or less. View full abstract»

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  • Determination of the Internal Discharge Resistance of Dielectric Materials

    Page(s): 106 - 114
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    The resistance to internal discharges of different materials is determined in samples with artificial cavities, the samples being composed of films of the material studied. Reasons are given why acceleration by increased stress is preferred to that by increased frequency. A relationship voltage life versus stress is given. View full abstract»

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  • Membership application

    Page(s): 115
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  • Author index

    Page(s): 116 - [116]-a
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  • Subject index

    Page(s): [116]a - [116]c
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Aims & Scope

This Transactions ceased production in 1993. The current retitled publication is  IEEE Transactions on Dielectrics and Electrical Insulation.

Full Aims & Scope