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IEEE Transactions on Electrical Insulation

Issue 3 • Date Sept. 1969

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Displaying Results 1 - 7 of 7
  • Table of contents

    Publication Year: 1969, Page(s): c1
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    Freely Available from IEEE
  • IEEE Electrical Insulation Group

    Publication Year: 1969, Page(s): c2
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  • Editorial

    Publication Year: 1969, Page(s): 73
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  • A Study of Humidification in the Thermal Life Determination of Motorette Insulation Systems

    Publication Year: 1969, Page(s):74 - 77
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2213 KB)

    The moisture conditioning cycle is the most critical factor in the functional evaluation of rotating machinery insulation systems. An analysis is made of some of the humidity problems currently existing, particularly in respect to the use of the now proposed IEEE 117 Test Procedure and the NRL-designed condensation chamber. A time-dependence ratio of surface-to-bulk absorption has been discovered ... View full abstract»

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  • Water Immersion Testing of Form-Wound Coil Insulation

    Publication Year: 1969, Page(s):77 - 82
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2126 KB)

    Motors are today required to operate in more severe environments than formerly. This paper reports a study of suitable test methods for evaluating the ability of insulation systems to withstand moisture exposure as thermal aging progresses. A new motorette exposure cycle has been recommended to the IEEE Working Group on Sealed Insulation Systems of the Rotating Machinery Committee. View full abstract»

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  • Considerations of New Magnet-Wire Enamels

    Publication Year: 1969, Page(s):82 - 85
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (654 KB)

    In the composite insulation system of a magnet-wire coating and a varnish, there is the possibility of harmful reaction between the two at elevated temperatures. Thus, there may be discontinuities in the Arrhenius curves (log of thermal life versus the reciprocal of the absolute temperature). Experimental results are given showing reactions between certain varnishes and certain combinations of pol... View full abstract»

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  • Specific Heats of a Magnet-Wire-Varnish-Enamel Combination as a Measure of Thermal Stability of the Insulation System

    Publication Year: 1969, Page(s):85 - 88
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    Changes in specific heat with time and temperature have long been used as an indicator of changes of state or of chemical changes. The differential-thermal-analysis (DTA) technique has been used to study both magnet-wire enamel and enamelvarnish systems. Polyimide enamels were studied to try to relate results to degree of cure and thermal life. The problem is complex but may ultimately lead to mor... 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