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Electrical Insulation, IEEE Transactions on

Issue 4 • Date Aug. 1978

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Displaying Results 1 - 13 of 13
  • IEEE Transactions on Electrical Insulation

    Publication Year: 1978 , Page(s): c1
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    Freely Available from IEEE
  • IEEE Electrical Insulation Society

    Publication Year: 1978 , Page(s): c2
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    Freely Available from IEEE
  • The Thomas W. Dakin Symposium on High-Voltage Insulation

    Publication Year: 1978 , Page(s): 203
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    Freely Available from IEEE
  • An Introduction to Thomas Wendell Dakin

    Publication Year: 1978 , Page(s): 204 - 210
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    Freely Available from IEEE
  • Disharges

    Publication Year: 1978 , Page(s): 211 - 238
    Cited by:  Papers (59)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (8707 KB)  

    The electric strength of solid insulation may decrease greatly with time of voltage application if discharges occur [1] within gaseous inclusions, [2] at sharp-edged conductors embedded in the solid, [3] on the surface from adjacent conductors, or [4] as a result of surface contamination. Mechanisms of breakdown and factors which affect the electric strength of gases are surveyed, as a basis for understanding the complex behavior of internal and surface discharges: particularly temporal changes in their magnitude and recurrence frequency. Mechanisms by which discharges cause progressive degradation and ultimate failure are considered, also techniques for assessing the relative resistance of materials to surface or internal discharges or "treeing". Finally the review surveys the merits of different methods for ensuring against failure by discharges. Reliance on short-term over-voltage tests reduces the cost of testing but there is considerable risk of trees or tracking being initiated, rendering the insulation more likely to fail in service. Discharge measurements reduce this risk, but it is important to discriminate between discharges in the test object and external interference. There is as yet inadequate information for specifying acceptable discharge levels for the many types of insulation and service conditions. insulation; indeed, chemically active products generated in them by ionization may promote progressive electrochemical deterioration and eventual breakdown by surface tracking or thermal instability. View full abstract»

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  • The Nature and Practice of Gases as Electrical Insulators

    Publication Year: 1978 , Page(s): 239 - 248
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4663 KB)  

    The gaseous state of matter is an excellent high voltage insulator which nonetheless is subject to overstresses and electrical breakdown. The main parameters which govern insulation strength in gases are identified as gas density and time duration of applied voltage. Several gases show similar effects of density and time changes so that generalized breakdown curves are presented. Practical considerations for the design of high voltage equipment are also developed through examples of insulation performance in compressed SF6. Features emphasized include the influence of electrode surfaces, particle contamination and solid insulating supports. Significant achievements in the application of gases to high voltage equipment and expected areas for future fundamental and applied developments are discussed. 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 (66)  |  Patents (3)
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    First Page of the Article
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  • A Tutorial on Treeing

    Publication Year: 1978 , Page(s): 277 - 288
    Cited by:  Papers (24)
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    Test methods for studying electric breakdown in solid dielectric materials through the mechanism of "Treeing" are described. While this tutorial is directed to internally initiated breakdown, the same basic progressive failure occurs in surface initiated breakdown, but at a different rate. Water treeing is discussed briefly, not because it is unimportant, but because in most cases water trees can lead to the development of electrical trees which cause the ultimate failure. View full abstract»

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  • Some Properties of Solid-Liquid Composite Dielectric Systems

    Publication Year: 1978 , Page(s): 289 - 307
    Cited by:  Papers (8)
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    The phenomenological aspects of the electrical properties of Solid-liquid dielectrics are discussed with special relevance to the utilization of such systems at high electric stresses. The implications of conduction, dielectric loss and breakdown in the separate phases have been related to the performance of the solid-liquid system as a whole. The effects of solid dielectric structure and thickness have been developed and associated with possible breakdown processes for the impregnated dielectric in practical situations. The use of plastic films, with or without paper, in impregnated capacitors is treated at some length as a useful device for developing the criteria which are important in all highly stressed solid-liquid systems. Considerable attention is given to aging phenomena and the way in which they may lead to various forms of failure in impregnated systems. Comprehensive data are provided from a summary of the literature relating to effects of temperature and electric stress applied singly and in combination. The effects of life-prolonging additives have been discussed briefly. View full abstract»

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  • Insulation Aging a Historical and Critical Review

    Publication Year: 1978 , Page(s): 308 - 317
    Cited by:  Papers (22)
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    Freely Available from IEEE
  • High Voltage Insulation Applications

    Publication Year: 1978 , Page(s): 318 - 326
    Cited by:  Papers (3)
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    This paper is intended to present an outline and a discussion of thevarious aspects and areas of application of electrical insulation forhigh voltage. The specific objectives of the applications will beparticularly pointed out, and the present state of the art indicated.Also, the relation of basic dielectric research, and research and developmentent scientists to the apparatus design and manufacturing engineers willbe discussed. View full abstract»

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  • Editorial policies and criteria

    Publication Year: 1978 , Page(s): 326-a
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    Freely Available from IEEE
  • Information for authors

    Publication Year: 1978 , Page(s): 326b
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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