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IEEE Transactions on Electrical Insulation

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  • Dielectric Breakdown Process of Polymers

    Publication Year: 1980, Page(s):206 - 224
    Cited by:  Papers (173)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4842 KB)

    Much experimental work has been done on the dielectric breakdown of solid dielectrics, and a number of breakdown theories have been proposed. Many problems, however, still remain on the breakdown process of polymers. Here, the breakdown process of polymers are discussed from the standpoint of the inherent properties of polymers such as chemical structure, structural irregularities, the presence of... View full abstract»

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  • On the Mechanism of Dielectric Breakdown of Solids

    Publication Year: 1980, Page(s):225 - 240
    Cited by:  Papers (68)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6431 KB)

    The mechanism of dielectric breakdown in solids, according to recent experimental evidence, involves the creation of a gaseous channel through the dielectric. The high conductance of breakdown appears to be associated with this channel, not with conduction through the solid itself. The central problem in the theory of dielectric breakdown in solids is thus to explain the development, in a strong e... View full abstract»

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  • Aging phenomenology and modeling

    Publication Year: 1993, Page(s):755 - 776
    Cited by:  Papers (118)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1580 KB)

    The authors review aging phenomenology and life modeling; illustrate different approaches, showing their advantages and applicability limits; and raise problems relevant to practical applications of models and evaluation of material endurance. They present the fundamentals of phenomenological aging theory and life modeling and give electrical and combined-stress life data for different materials. ... View full abstract»

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  • Classification of partial discharges

    Publication Year: 1993, Page(s):917 - 931
    Cited by:  Papers (170)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1020 KB)

    For a long time, classification of partial discharges was performed by eye, by studying discharge patterns at the ellipse of an oscilloscope screen. The introduction of digital processing techniques allowed automation of the recognition procedure. These procedures are reported and applied to a number of actual HV constructions which suffer from partial discharges. The results of these tests show t... View full abstract»

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  • Spark-to-glow discharge transition due to increased surface conductivity on epoxy resin specimens

    Publication Year: 1993, Page(s):1 - 8
    Cited by:  Papers (92)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    The effects of long exposure of epoxy resin surfaces to partial discharges under AC field stress were examined. The use of electrical pulse measuring techniques in conjunction with light emission measurements using a photomultiplier tube, which allowed simultaneous detection of both spark and glow discharges, permitted the establishment of a definite transition from spark to glow discharges. Spark... View full abstract»

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  • Analysis of Paschen Curves for air, N2 and SF6 Using the Townsend Breakdown Equation

    Publication Year: 1982, Page(s):350 - 353
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    It has been shown that it is possible to extend the validity of the Townsend breakdown criterion for evaluating the breakdown voltages in the complete pd range in which Paschen curves are available. Evaluation of the breakdown voltages for air (pd=0.0133 to 1400 kPa · cm), N2(pd=0.0313 to 1400 kPa · cm) and SF6 (pd=0.3000 to 1200 kPa · cm) has been done and in most cases the compute... View full abstract»

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  • Corona charging of polymers

    Publication Year: 1992, Page(s):924 - 943
    Cited by:  Papers (98)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1440 KB)

    A review of the corona charging of polymers is presented. After providing a brief account of the corona discharge process and of its application for charging materials, the paper focuses on the evolution of corona triodes that allow the sample surface potential to be monitored during the charging process. Particular emphasis is given to the main contributions arising from research, basically on Te... View full abstract»

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  • Surface flashover of insulators

    Publication Year: 1989, Page(s):765 - 786
    Cited by:  Papers (297)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1664 KB)

    The author reviews surface flashover (i.e. voltage breakdown along the surface of insulators), primarily in vacuum. He discusses theories and models relating to surface flashover and pertinent experimental results. Surface flashover of insulators in vacuum generally is initiated by the emission of electrons from the cathode triple junction (the region where the electrode, insulator, and vacuum mee... View full abstract»

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  • Flashover of insulators in vacuum: review of the phenomena and techniques to improved holdoff voltage

    Publication Year: 1993, Page(s):512 - 527
    Cited by:  Papers (207)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    Reviews surface flashover of insulator, primarily in vacuum, although some comments are made about the effect of ambient gases on surface flashover. It presents theoretical mechanisms of surface flashover and pertinent experimental results. The holdoff voltage of insulators depends upon many insulator parameters, such as material, geometry, surface finish, and attachments to electrodes, but also o... View full abstract»

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  • Stochastic properties of partial-discharge phenomena

    Publication Year: 1991, Page(s):902 - 948
    Cited by:  Papers (133)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3656 KB)

    The author presents a bibliography and survey of the literature concerned with theory and measurement of the stochastic behavior of pulsating partial-discharge (PD) phenomena that can occur when insulation is subjected to electrical stress. The types of PD phenomena considered include AC and DC generated electron avalanches, pulsating positive and negative corona in gases, and PD that occur in liq... View full abstract»

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  • Detection of partial discharges (Corona) in electrical apparatus

    Publication Year: 1990, Page(s):111 - 124
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1428 KB)

    The development of the various partial-discharge test methods as applied to cables, capacitors transformers, and rotating machines is examined in an historical context. Special emphasis is placed on various discharge pulse analysis techniques, although it is pointed out that integrated charge measurements should receive greater attention, in particular as concerns their capability to respond to gl... View full abstract»

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  • Measurement of spatial charge distribution in thick dielectrics using the pulsed electroacoustic method

    Publication Year: 1988, Page(s):433 - 439
    Cited by:  Papers (263)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Measurement techniques of volume charge distribution within insulating materials are developed using a pulsed electroacoustic method. The fundamental equation of the relation between the charge distribution in the insulating material and the signal voltage from the electroacoustic transducer is presented along with the typical measured charge profiles in polymethylmethacrylate (PMMA) during and af... View full abstract»

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  • Fundamental Limitations in the Measurement of Corona and Partial Discharge

    Publication Year: 1982, Page(s):143 - 150
    Cited by:  Papers (118)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2003 KB)

    The theoretical sensitivity of conventional partial discharge detectors is compared with that obtained from ultra wideband (UWB) (up to l GHz) detection systems. The comparison indicates that for relatively lossfree distributed systems, such as SF6 insulated bus, the UWB system is up to two orders of magnitude more sensitive. UWB detection also embodies additional advantages such as facilitating t... View full abstract»

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  • A review of the charge simulation method and its applications

    Publication Year: 1989, Page(s):3 - 20
    Cited by:  Papers (158)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1188 KB)

    The author provides a comprehensive review of the basic charge simulation method and its various modified versions reported in the literature. Applications of the charge simulation method, alone as well as in combination with other methods, are considered. Different aspects of this method are critically examined and its potentials and limitations are identified. Possible areas of future research a... View full abstract»

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  • The Influence of Morphology on the Electric Strength of Polymer Insulation

    Publication Year: 1980, Page(s):382 - 388
    Cited by:  Papers (67)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4370 KB)

    This paper describes the effect of morphological structure on the electric strength and some physico-chemical properties of polymers with flexible chains (HDPE, LDPE, PP) and polymers with rigid chains (CA). It is shown that a polymer body has a discrete structure consisting of elements of different densities. The most regular structure with high density is characteristic of spherulites. Their siz... View full abstract»

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  • Dielectric Properties of Biological Materials: Biophysical and Medical Applications

    Publication Year: 1984, Page(s):453 - 474
    Cited by:  Papers (133)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4273 KB)

    A review is given of the dielectric properties of mammalian tissues for the frequency range 1 Hz to 10 GHz. Such information is of relevance to a number of medical diagnostic and therapeutic applications which involve the use of non-ionizing electromagnetic radiation, as well as to studies of the possible biological effects arising from exposure to electric and magnetic fields. Dielectric studies ... View full abstract»

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  • Internal Partial Discharge and Material Degradation

    Publication Year: 1986, Page(s):899 - 905
    Cited by:  Papers (78)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1753 KB)

    Partial discharge (PD) pulses are considered to be generated after application of overvoltage across a cavity. Their magnitude is proportional to the n-th power of overvoltage. It decreases with an increase in cavity space and moisture content. Very long time lags for PD inception, such as even a day, was confirmed. This phenomenon is associated with PD's statistical time lag in the number of free... View full abstract»

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  • Surface current density K: an introduction

    Publication Year: 1991, Page(s):416 - 417
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB)

    The author discusses the vector surface of current density K used in electrical insulation studies. K is related to the vector tangential electric field Kt at the surface of a body by the vector equation KE t where Γ represents the surface conductivity. The author derives a surface continuity equation that represents... View full abstract»

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  • A Commentary on Partial Discharge Measurement and Detection

    Publication Year: 1987, Page(s):629 - 653
    Cited by:  Papers (56)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5828 KB)

    A critical review is presented on the various electrical methods available for partial discharge detection and measurement in terms of their chronological development and application on cable, capacitor, transformer, and machine insulation specimens. A substantial portion of the effort is devoted to corona pulse detection techniques, because these constitute the most popular forms of corona measur... View full abstract»

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  • An experimental method to determine the electrostatic field enhancement factor of a practical conductor surface

    Publication Year: 1989, Page(s):325 - 333
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    A method of determining the field enhancement factor of a practical conductor is presented. The method is developed from a modified theory of discharge onset in a gaseous medium. This modification incorporates the influence of conductor surface roughness. Onset data from an experimental study that utilized electrodes of varying surface roughness are examined, and the results obtained using the pro... View full abstract»

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  • Progress in the Field of Electric Breakdown in Dielectric Liquids

    Publication Year: 1978, Page(s):249 - 276
    Cited by:  Papers (120)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7302 KB)

    First Page of the Article
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  • Dielectric effects of moisture in polyimide

    Publication Year: 1989, Page(s):31 - 38
    Cited by:  Papers (69)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    Measurements of the complex permittivity of polyimide (PI) films in a temperature range from 80 to 325 K are reported. Two loss peaks show the pronounced influence of absorbed water on this part of the relaxation spectrum. Since these loss peaks can be removed by drying the film, it is concluded that the water dipole causes this relaxation process and not an intrinsic dipole of the PI chain. Diffe... View full abstract»

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  • IEEE and IEC Codes to Interpret Incipient Faults in Transformers, Using Gas in Oil Analysis

    Publication Year: 1978, Page(s):349 - 354
    Cited by:  Papers (184)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (843 KB)

    The detection of incipient faults in oil immersed transformers by examination of the gases dissolved in the oil developed from the original Buchholz relay application. The gases produced during the deterioration of mineral oil and cellulose were examined and techniques were established to assist in the interpretation of the type of fault, incipient or growing, occurring within the transformer. The... View full abstract»

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  • Parameter Estimation for the Weibull Distribution

    Publication Year: 1977, Page(s):253 - 261
    Cited by:  Papers (65)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1307 KB)

    The time to electric breakdown, and the electric field necessary to result in breakdown of solid insulation, seem to be best represented by a Weibull probability distribution. This tutorial paper reviews the graphical method of estimating the parameters of the Weibull distribution. It also presents the method of Maximum Likelihood as an objective technique, developed by statisticians for improving... View full abstract»

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  • Dielectric properties of agricultural products-measurements and applications

    Publication Year: 1991, Page(s):845 - 869
    Cited by:  Papers (125)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1732 KB)

    The nature of the variation of dielectric properties with frequency, temperature, and product density is discussed. Techniques for measurement of dielectric properties are briefly reviewed, and graphical data on the dielectric properties of grain and soybeans as functions of moisture content, frequency, temperature, and bulk of density are presented. Applications in the electrical measurement of t... View full abstract»

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  • Discharge Characteristics of Gaseous Dielectrics

    Publication Year: 1986, Page(s):855 - 867
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2757 KB)

    This chapter reviews studies of discharge characteristics and insulating properties of SF6 gas conducted in Japan, stressing works of the recent five to ten years. It deals with the following items. (a) computer simulation of basic processes of discharge in SF6, (b) discharge characteristics in non-uniform fields, (c) breakdown characteristics in nearly uniform fields: breakdown criterion and brea... View full abstract»

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  • A General Approach to the Endurance of Electrical Insulation under Temperature and Voltage

    Publication Year: 1981, Page(s):277 - 289
    Cited by:  Papers (111)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1609 KB)

    The paper deals with the models for estimating the life of electrical insulation under multiple stress conditions. In a first approach, simple models, the inverse-power law and the exponential, are considered for electrical aging; they are combined with the Arrhenius model to find the life equation of insulating materials under temperature and voltage. This equation is discussed and the correspond... View full abstract»

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  • Electrical Conduction and Carrier Traps in Polymeric Materials

    Publication Year: 1984, Page(s):162 - 178
    Cited by:  Papers (145)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2363 KB)

    Better understanding of the fundamental electrical properties of polymeric materials is a key to their further progress in the practical application, not only as electrical insulating materials, but also as functional elements. In this paper, recent topics and their important results will be reviewed on electrical conduction and related problems including carrier traps and electrical breakdown in ... View full abstract»

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  • The theory and measurement of partial discharge transients

    Publication Year: 1991, Page(s):487 - 497
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    A theoretical approach to partial discharge transients is presented. This approach is based on the relationship between the charge induced on the measurement electrode by those created in the interelectrode volume during partial discharge activity. The primary sources for these induced charges are the charges which, as a result of partial discharge activity, are distributed within the voids of the... View full abstract»

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  • Novel Partial Discharge Measurement Computer-Aided Measuremnet Systems

    Publication Year: 1986, Page(s):1015 - 1019
    Cited by:  Papers (80)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1217 KB)

    A computer-aided measurement system has enabled novel interpretation of partial discharge (PD) signals. We take into consideration voltage phase-angle at which each PD pulse takes place, and consequently need simultaneous measurement of the pulse height q and the phase angle ϕ. According to the analysis of PD pulse signals, close relation between PD pulse signals and insulation degradation... View full abstract»

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  • Thermal Ageing of Cellulose Paper Insulation

    Publication Year: 1977, Page(s):61 - 66
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (939 KB)

    Results are presented of investigations into the thermal ageing behavior of cellulose paper insulation in which tests have been carried out between 100C and 160C on well-dried samples of cellulose paper contained in sealed glass vessels in an atmosphere of initially dry nitrogen gas. The degree of ageing has been assessed by measuring the time rate of decrease of several physical and physico-chemi... View full abstract»

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  • Streamer propagation over a liquid/solid interface

    Publication Year: 1993, Page(s):230 - 242
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    A needle immersed in transformer oil is located just above a sheet of glass of which the opposite surface is conducting. By applying high-voltage (HV) steps, streamers which propagate radially with numerous branches are generated. The characteristics of these discharges (mean propagation velocity, final extension, and electric current and charge) are determined, and the measured charge is compared... View full abstract»

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  • Models for insulation aging under electrical and thermal multistress

    Publication Year: 1990, Page(s):923 - 934
    Cited by:  Papers (100)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (780 KB)

    A review of the methods and models used in lifetime studies of solid insulators under single- and multiple-stress conditions is presented. The statistical methods used with this type of data are described briefly, including the two-parameter Weibull distribution and the log-normal distribution, which are the two distributions most frequently used in aging studies. Lifetime models under multiple st... View full abstract»

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  • On the electrical breakdown of gaseous dielectrics-an engineering approach

    Publication Year: 1989, Page(s):721 - 739
    Cited by:  Papers (86)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1260 KB)

    Following an examination of the basic gas-discharge concepts, the Townsend breakdown criterion is derived for nonuniform fields and a reformulation of the streamer criterion is undertaken. A direct application of the Townsend criterion to a practical situation is hardly possible, whereas the streamer criterion leads to applicable criteria for the onset of breakdown in air as well as in strongly el... View full abstract»

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  • Mechanisms of Surface Flashover Along Solid Dielectrics in Compressed Gases: a Review

    Publication Year: 1986, Page(s):727 - 746
    Cited by:  Papers (82)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4120 KB)

    Surface flashover in compressed-gas insulated systems is a much studied, but poorly explained phenomenon. In this paper we review the literature of surface flashover with primary emphasis on the understanding of physical processes leading to discharge initiation and insulator flashover under high voltage excitation. The flashover models presently in vogue will first be discussed, followed by the r... View full abstract»

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  • Partial discharges in ellipsoidal and spheroidal voids

    Publication Year: 1989, Page(s):335 - 342
    Cited by:  Papers (149)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    Transients associated with partial discharges in voids can be described in terms of the charges induced on the terminal electrodes of the system. The relationship between the induced charge and the properties which are usually measured is discussed. The method is illustrated by applying it to a spheroidal void located in a simple disk-type spacer View full abstract»

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  • Detection and location of internal defects in the insulation of power transformers

    Publication Year: 1993, Page(s):1057 - 1067
    Cited by:  Papers (51)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    With the development of fast, and low-cost analog-digital converters (ADCs) and new mathematical procedures for waveform description, e.g., time encoded signal processing and recognition (TESPAR), novel approaches to detect and locate internal defects in the insulation of power transformers become feasible if the following requirements are fulfilled: the equivalent circuit of the insulating system... View full abstract»

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  • The measurement of charge on single particles in transformer oil

    Publication Year: 1991, Page(s):1094 - 1103
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    The author addresses the role of particles in the breakdown of insulating oils by studying the motion of a single stainless steel ball as it transfers charge in an oscillatory manner between two DC planar electrodes immersed in transformer oil. The ball ranged in radius from 0.5 to 1.6 mm and the electrode gap from 8 to 12 mm. The maximum electric field within the gap was 3.5 MV/m. The ball was ei... View full abstract»

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  • The thermal conductivity of crosslinked polyethylene insulation in aerial bundled cables

    Publication Year: 1991, Page(s):1153 - 1158
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The calculation of the current rating of crosslinked polyethylene insulated (XPLE) aerial bundled cables is based on the temperature rise of the conductors, whereas the external thermal resistance depends on the temperature rise of the surface of the cable. It is necessary, therefore, to calculate the temperature difference between the conductors and the surface of the cable. This calculation requ... View full abstract»

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  • Testing Methods for Power Cable Insulation

    Publication Year: 1986, Page(s):1051 - 1056
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    Testing methods for power cable insulation depend basically on type and material of cable insulation. Cross-linked Polyethylene (XLPE) is now spreading widely for power cable insulation at the rated voltage of 66 to 154 kV world-wide, and especially in Japan many 275 kV lines have already been put in service. Typical conventional power cable insulation is oil-impregnated paper which is used mainly... View full abstract»

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  • Effects of crystallinity and electron mean-free-path on dielectric strength of low-density polyethylene

    Publication Year: 1991, Page(s):258 - 265
    Cited by:  Papers (30)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1184 KB)

    The relation between crystallinity and the mean free path of high-energy electrons in low-density polyethylene and their effects on dielectric strength was studied. Thin LDPE films obtained by vacuum evaporation were annealed at temperatures between room temperature and 100°C. Crystallinity was measured by X-ray diffraction. Electrons were injected into the film by photo-emission and the energ... View full abstract»

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  • Water treeing in polyethylene cables

    Publication Year: 1990, Page(s):989 - 1028
    Cited by:  Papers (149)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3520 KB)

    Water tree growth in polyethylene cable insulation is discussed. The characteristics of water trees, the effect of aging parameters on water tree growth, and the possible mechanisms of growth are considered, emphasizing vented tree development in polyethylene insulating materials. The morphology of water trees, the characteristics of the tree-infested dielectric cable, and test methods and measure... View full abstract»

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  • Theory of Stress Distribution in Insulation of High-Voltage DC Cables: Part I

    Publication Year: 1975, Page(s):27 - 35
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1811 KB)

    The theory of stress distribution in the insulation of high-voltage direct current (dc) cables is refined by accurately including the effects of heating by the leakage current. The results have specific implications with respect to thermal instability; in particular, a new type of instability is identified. Numerical examples are presented, and certain published experimental data are shown to supp... View full abstract»

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  • Mechanism of Surface Charging of High-Voltage Insulators in Vacuum

    Publication Year: 1973, Page(s):17 - 21
    Cited by:  Papers (105)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1007 KB)

    In vacuum, the surface of insulators becomes electrically charged when subjected to high-voltage stresses. The charging mechanism is described. A model simulating the charging shows that the surface charge densities are proportional to the applied voltage and depend on the secondary electron emission of the dielectric surface. It is also time dependent. Surface charges are shown to explain many re... View full abstract»

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  • Dynamics of polarization growth and reversal in PVDF films

    Publication Year: 1989, Page(s):461 - 468
    Cited by:  Papers (61)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Measurements are presented of the time development of the dielectric displacement and the remanent polarization in polyvinylidene fluoride (PVDF) for poling times ranging from 1 μs to 1000 s and poling fields between 0.8 and 2.0 MV/cm. For longer times (0.1 to 1000 s), the time dependence of the polarization distribution across the film thickness is also determined. After application of a steep... View full abstract»

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  • Dielectric behavior of silicone and ester fluids for use in distribution transformers

    Publication Year: 1991, Page(s):755 - 762
    Cited by:  Papers (39)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    Investigations to determine the relevant electric and dielectric properties of certain insulating fluids which appeared most suitable from the viewpoint of environmental compatibility and inflammability are discussed. Two of these are silicone fluids based on linear polydimethyl siloxane (kinematic viscosity at 25°C is 50 mm2/s) and an ester fluid based on penthaerythrithol tetraest... View full abstract»

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  • An Electric Stress-Pulse Technique for The Measurement of Charges in A Plastic Plate Irradiated by an Electron Beam

    Publication Year: 1987, Page(s):497 - 501
    Cited by:  Papers (80)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (774 KB)

    The distribution profile and quantity of charges in insulators have been studied by various methods, some of them utilizing thermal, mechanical, and electrical stimulations. A new method, incorporating pulse electric stimulations and pulse acoustic detection, is reported here along with preliminary results of the measurement of the amount and approximate distribution profile of charges in electron... View full abstract»

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  • Topics in electronic ceramics

    Publication Year: 1990, Page(s):935 - 987
    Cited by:  Papers (111)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4316 KB)

    Four topics in the field of electronic ceramics are reviewed: multilayer ceramic capacitors, piezoelectric ceramics, electrooptic ceramics, and ferroelectric thin films. They all are related to ferroelectric ceramic materials. The scope of this review is limited to oxide compounds, because oxide ferroelectrics, for the most part, exhibit the most useful properties and have found the most applicati... View full abstract»

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  • An expression of the electric field distribution in rod-plane gaps

    Publication Year: 1988, Page(s):493 - 494
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    A closed-form expression is derived to represent the electric field distribution along the axis of rod plane gaps in the ranges 0.1-1 cm for the electrode radius and 2-12 cm for the gap spacing. The expression is valuable in modeling discharge development in SF6 gaps View full abstract»

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  • Optical detection of partial discharges using fluorescent fiber

    Publication Year: 1991, Page(s):783 - 789
    Cited by:  Papers (11)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    An optoelectronic system for detecting partial discharges in a sheltered HV device is described. The system consists of a fluorescent plastic optical fiber, with photomultipliers or photodiodes measuring the light intensity at the end of the fiber. The result depends on various factors that might influence the optical detection sensitivity. Information is given on commercially available fluorescen... View full abstract»

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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