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Electrical Insulation, IEEE Transactions on

Issue 2 • Date June 1975

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Displaying Results 1 - 12 of 12
  • Table of contents

    Publication Year: 1975 , Page(s): c1
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  • IEEE Electrical Insulation Group

    Publication Year: 1975 , Page(s): c2
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  • Theory of Stress Distribution in Insulation of High-Voltage DC Cables Part II

    Publication Year: 1975 , Page(s): 49 - 54
    Cited by:  Papers (2)
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    The theory of voltage gradients in the insulation of high-voltage dc cables insulated with oil-impregnated paper is refined by including the effects of power losses within the insulation. The analysis is performed by means of perturbation theory, which yields formulas that are more convenient to use than the more exact results derived in a companion paper. View full abstract»

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  • Dielectric Measurements on Liquid Resins and Curing Agents from 10-200 MHz

    Publication Year: 1975 , Page(s): 54 - 57
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    The goal was to develop a simple method for determining the dependence of dielectric constant and loss tangent on frequency in the range 10-200 MHz for a number of dielectrically lossy liquid resins. A test cell was devised which could be used with an available Hewlett-Packard RX meter. The calculations were worked out based on a calibration of cell constants and series inductance determined with five standard liquids. Data for five commercial resins and four curing agents are given. The method provides 5-percent or better accuracy up to 200 MHz. View full abstract»

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  • Effect of Dissolved Gases, Stress, and Gap Spacing on High-Field Conductivity in Liquid Insulants

    Publication Year: 1975 , Page(s): 58 - 62
    Cited by:  Papers (3)
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    The effect of dissolved gases in mineral oil on conduction currents and conduction current pulses at high fields has been investigated. For a given stress, larger gaps resulted in increased conduction currents as well as current pulses. Oxygen, nitrogen, and air dissolved at small equilibrium pressures (1 torr) resulted in a reduction in the number of current pulses of various magnitudes. However, increasing the oxygen content to 20 torr gave more pulse activity. The results are discussed by considering a model which invokes both cathode and anode space charges. View full abstract»

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  • AC Conduction in Impregnated Polymer Insulating Systems

    Publication Year: 1975 , Page(s): 62 - 68
    Cited by:  Papers (11)
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    Experimental data are presented describing the relationship between the dissipation factor of capacitors containing polypropylene film impregnated with trichlorodiphenyl and the applied voltage, the duration of the applied voltage, and the thickness of the liquid layer adjacent to the polymer film. A general theoretical treatment based on the equivalent circuit representation of a low-loss polymer capacitor in series with a high-loss liquid capacitor provides a qualitative explanation of the experimental data. The results demonstrate that ion conduction in the thin liquid layers between the impregnated polymer and the electrodes can account for the observed dissipation factor. The ion transit time across the liquid layer is very short compared to the period of a half-cycle so the ions are immobilized on the film or foil surfaces for a large fraction of each half-cycle. The ion transit time and consequently the dissipation factor are strong functions of the applied field and the thickness of the liquid layer. These factors as well as a trapping of the ions by the film causing the dissipation factor to decrease with time on voltage must be considered in interpreting the dissipation factor data of impregnated polymers and in attaining the potentially low losses possible in these systems. View full abstract»

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  • The Discharge-Repetition Rate in Cavities in Epoxy Resin, Polyethylene, and Mica under Alternating Voltage Conditions

    Publication Year: 1975 , Page(s): 69 - 74
    Cited by:  Papers (8)
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    An investigation into the repetition rate and magnitude of internal discharges in artificial cavities in epoxy resin, polyethylene, and mica, using a multichannel pulse height analyzer is described. The effect of time of voltage application, cavity dimensions, and location, and opening the cavity or ventilating it in air and nitrogen has been studied. The results indicate that it is the discharge quantity rather than the discharge energy measured externally in the largest pulse that is important. It is suggested that in order to correlate discharge damage with discharge activity, it is essential to measure continuously both discharge magnitudes and repetition rates. View full abstract»

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  • Abstracts of Electrical Insulation in Japan January-June 1974

    Publication Year: 1975 , Page(s): 75 - 81
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  • Contributors

    Publication Year: 1975 , Page(s): 82
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  • Membership application

    Publication Year: 1975 , Page(s): 82-a - 82-b
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  • Editorial policies and criteria

    Publication Year: 1975 , Page(s): 82-c
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  • Information for authors

    Publication Year: 1975 , Page(s): 82d
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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