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IEEE Transactions on Electrical Insulation

Issue 2 • Date April 1987

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Displaying Results 1 - 25 of 27
  • IEEE Transactions on Electrical Insulation

    Publication Year: 1987, Page(s): c1
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  • IEEE Dielectrics and Electrical Insulation Society

    Publication Year: 1987, Page(s): c2
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  • 2nd International Conference on Conduction and Breakdown Solid Dielectrics

    Publication Year: 1987, Page(s): 113
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  • Table of contents

    Publication Year: 1987, Page(s): 114
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  • Breakdown and Prebreakdown Phenomena in Solid Dielectrics

    Publication Year: 1987, Page(s):115 - 122
    Cited by:  Papers (59)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1429 KB)

    In this review we concentrate on simple phenomenological models which lead to testable predictions. We discuss inhomogeneous field situations since in practice breakdown and aging starts as points of local field enhancement. The well known space-charge-limited-current model is generalized in several steps to field-dependent mobility, negative differential resistance and impact ionization. A fracta... View full abstract»

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  • Detection of Hot Electron-Induced Radiation Damage in Organic Dielectrics by Exoelectron Emission from Thin Films

    Publication Year: 1987, Page(s):123 - 128
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1075 KB)

    Charge trapping in thin dielectric films on metal substrates is investigated by thermally and optically stimulated exoelectron emission. The techniques are used to detect hot-electron-induced chemical degradation of hydrocarbon films. Radiation-induced electron traps are found if the films are irradiated with hot electrons above a threshold energy of 3.5 to 4 eV. View full abstract»

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  • The Thermalization and Trapping of Electrons in Polystyrene

    Publication Year: 1987, Page(s):129 - 132
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (700 KB)

    An electron injection technique has been used to study the transport of electrons in polystyrene. A 2 kV electron beam is used to inject a short pulse of charge into the free surface of the polymer film, and a second electron beam monitors the surface potential of the film. From the time dependence of the surface potential following the injected pulse one may infer the position of the injected car... View full abstract»

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  • Anisotropy of Photoconduction in Polyimide

    Publication Year: 1987, Page(s):133 - 138
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (863 KB)

    An anisotropy of photoconduction in polyimide was investigated in relation to the molecular orientation. The anisotropy of the molecular chain alignment was observed by wideangle X-ray diffraction. The photocurrents in the three directions were measured. The in-plane photocurrents were anisotropic. As polyimide was drawn, the molecular chain had a tendency to arrange along the drawing direction an... View full abstract»

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  • Electrical Breakdown of Epr-Insulated Cables at DC and Impules Voltages

    Publication Year: 1987, Page(s):139 - 143
    Cited by:  Papers (2)
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    The electric strengths of three EPR-compounds are investigated using dc, impulse and impulse with dc bias voltages. To see whether dc and impulse strengths are affected by vulcanization residues, breakdown tests are carried out at different times after vulcanization. Different levels of dc perstress cause a considerable influence on the impulse breakdown strength, whereas the duration of dc prestr... View full abstract»

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  • The City Hall of Erlangen and the Conference site.

    Publication Year: 1987, Page(s):144 - 206
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  • Chemical Prpcesses During Electrical Breakdown in an Organic Dielectric with Evaporated Thin Electrodes

    Publication Year: 1987, Page(s):145 - 149
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    In capacitors with metallized organic dielectrics electrical breakdown may be of great importance for reliability. In the case of pinholes in the dielectric, the thin electrodes in the surroundings are vaporized within a few ¿s and therefore the pinholes are insulated. This process is closely associated with gas reactions. The atoms of the dielectric decomposed by the spark plasma are converted b... View full abstract»

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  • The Role of Ions in the Mechanism of Water Tree Growth

    Publication Year: 1987, Page(s):151 - 156
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (701 KB)

    This paper reports the influence of the negative ions present in the experimental system on water trees grown from a water electrode. These results have been correlated with the physical properties of the ions. A theoretical mechanism is described which explains how the ions may penetrate the polymer, which is in agreement with the experimental results. The authors consider that ionic penetration ... View full abstract»

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  • Relationship between the Chemical Structure and the Effectiveness of Additives in Inhibiting Water-Trees

    Publication Year: 1987, Page(s):157 - 161
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2079 KB)

    Phenomenological investigations of water trees showed clearly that their formation can be inhibited by additives. Stabilizers for concentrated solutions of H2O2 were found to be particularly effective. Based on this observation, a model of water-tree formation was postulated, which considers water treeing essentially as an oxidative degradation with electrochemical initiation at defects and at wat... View full abstract»

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  • Conductivity and Thermally Srimulated Processes I Model Ionic Pplymers. I. Halato Telechelic Polybutadienes.

    Publication Year: 1987, Page(s):163 - 168
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (803 KB)

    The relaxation and conductivity properties of model ioncontaining macromolecules, i. e. halato-telechelic polybutadienes with various degrees of neutralization, were investigated from 100 to 350 K by means of thermally stimulated depolarization and polarization methods, stressing the comparison of materials based on alkaline (Na, K, Li) and alkalineearth (Ba, Ca, Mg) cations. It was shown that the... View full abstract»

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  • Rate Theory and Polyethylene Relaxations

    Publication Year: 1987, Page(s):169 - 174
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (791 KB)

    Polyethylene relaxation results are shown to be described very well by the rate theory associated with the name of Eyring. In agreement with this theory the oa, B, and ¿¿ relaxations have constant AH and AS values as long as the results are plotted properly, i. e. as log(¿¿/T) vs 1/T. Since AS values are far from being negligible this means that the energy parameter typical of a given relaxation i... View full abstract»

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  • Electrical Breakdown of Ethylene Copolymers

    Publication Year: 1987, Page(s):175 - 179
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (661 KB)

    co was found that the electric strength FB of ethylene co-polymers containing optimum content of halogen compouns copigher than that of LDPE over a wide temperature range from -196 to 90°C, and that their conduction current was suppressed at the higher fields. It is thought that the introductioned comonomers with halogen groups into polyethylene suppresses the electron acceleration due to an incr... View full abstract»

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  • Kerr Electro-Optic Field Mapping Measurements in Electron Beam Irradiated Polymethylmethacrylate

    Publication Year: 1987, Page(s):181 - 185
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2278 KB)

    Kerr electro-optic field mapping measurements are presented in electron beam irradiated polymethylmethacrylate (PMMA) where the accumulated trapped charge results in large self-electric fields of the order of 1 to 2.5 MV/ cm. The resulting numerous light maximum and minimum recorded on photographic film and videotape allow accurate measurement of the time dependence of the electric field and space... View full abstract»

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  • Characterization of GIS Spacers Exposed to SF6 Decomposition Products

    Publication Year: 1987, Page(s):187 - 193
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1962 KB)

    SF6 gas-insulated switchgear is a sealed system, but low- level contamination can accumulate and affect spacer performance. The degradation of a number of spacer materials exposed to either direct arcing conditions or arc by-products was investigated to correlate their surface molecular features with changes in electrical performance. Electron Spectroscopy for Chemical Analysis, Scanning Electron ... View full abstract»

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  • Theory of Dispersive Tramsport in Disordered Solids

    Publication Year: 1987, Page(s):195 - 198
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (594 KB)

    A mean-field theory of electronic and atomic dispersive hopping and/or multiple trapping transport in disordered solids is presented. The theory is based on a set of microscopic Markovian transport equations which are solved for the averaged dc and ac mobility by means of a two-site effective medium approximation. The averaged transient current is obtained by solving the macroscopic equation for t... View full abstract»

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  • Synthesis Reactions Involving XLPE Subjected to aartial Discharges

    Publication Year: 1987, Page(s):199 - 205
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2664 KB)

    It is shown that the degradation of XLPE, resulting from its exposure to partial discharges, leads to the formation of solid, liquid and gaseous products that result directly from the discharge synthesis reactions taking place within the intervening electrode gap space. The prime reagents in the discharge synthesis process are found to be CO2, CO, H20 and acetophenone. In order that these synthesi... View full abstract»

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  • Electric Field-Induced Gas Emission from PVDF Films

    Publication Year: 1987, Page(s):207 - 210
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Charge injection, conduction and trapping are important processes for stabilizing the electric polarization in the piezoelectric polymer PVDF. In order to study the nature of the pertinent charges in PVDF we measured the gas emission from PVDF using a permeable electrode under an applied electric field up to 0.7 MV/ cm. The films were covered on one side with evaporated copper, on the other side a... View full abstract»

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  • Some Aspects of the Relationship between Water Treeing, Morphology, and Microstructure of Pplymers

    Publication Year: 1987, Page(s):211 - 217
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2622 KB)

    Water treeing is one of the main causes of premature breakdown of the polymeric insulation of HV power cables. The work reported in this paper is the combined effort of three different laboratories to investigate water treeing behavior of several polymers by complementary techniques. These include determination of water tree growth kinetics by continuous optical monitoring, fatigue environmental s... View full abstract»

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  • In this issue - Technically

    Publication Year: 1987, Page(s): 218
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  • Time-Dependent Dielectric Susceptibility in High Electric Fields

    Publication Year: 1987, Page(s):219 - 224
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    The dielectric ac susceptibility in thin films of amorphous anodic aluminum oxide is found to be field-dependent and time-dependent. After application of a static bias field the diectric ac susceptibility increases instantly, and then relaxes logarithmically in time. The system exhibits non-linear time-variant properties but the measured changes are reversible. A model for the description of the o... View full abstract»

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  • Meetings

    Publication Year: 1987, Page(s): 225
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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