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Electrical Insulation, IEEE Transactions on

Issue 1 • Date March 1965

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Displaying Results 1 - 7 of 7
  • Table of contents

    Page(s): c1
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    Freely Available from IEEE
  • IEEE Electrical Insulation Group

    Page(s): c2
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    Freely Available from IEEE
  • A Place in the Spectrum

    Page(s): 1
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    Freely Available from IEEE
  • Test of Surface Electrical Failure of Organic Insulators by Means of Intermittent Discharges from a Capacitor

    Page(s): 2 - 8
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    The recent introduction of numerous organc and semi semi-organic electrical insulating materials emphasizes the need to n investigate tracking resistance. Many test methods for the purpose of testing the surface failure of insulating materials have been e devised; each one has some advantage and fault due to the required test conditions. Consequently it seems difficult to choose the standard rd method for the evaluation of tracking resistance. The IEC recommended test method [1] for the property has been thought to be a reliable method until now, however even the IEC method has some faults. It is not suitable for testing materials having high tracking resistance, and the electrolytic solution dropped on the surface of insulator specimen may influence test results differently depending on the sorts of materials tested. The authors carried out a study on the dry test method of surface electrical failure of organic insulators with a view to eliminating the faults described above, and compared it with other test methods. View full abstract»

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  • Some Relations of Thermal Cycling to Thermal Life Temperature Classification of Enameled Wire Determined by AIEE 57 Test Procedures

    Page(s): 9 - 11
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    The industry has long recognized that thermal cycling and thermal shock resistances of enameled wire play an important part in determing the thermal life by AIEE 57 test methods. Data are presented for varying thermal cycling indicating significant arivariation of temperature classification roughly from Class 155°C to Class 105°C for the same wire enamel. It is also shown that if the thermal cycling procedure is held constant, reasonable conformity of test results can be expected. View full abstract»

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  • Pulse Height and Temporal Distribution at Dielectric Surfaces under Corona

    Page(s): 12 - 18
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    Discharges at a dielectric surface are obtained using a metal sphere separated by a distance of 0.002 inch from a 0.0005 inch thick dielectric. The magnitude and temporal distribution of the discharges is monitored by photomultiplier detection and magnetic recording. A change in the distribution of the pulse agni magnitudes is observed as the time of voltage applications is increased. There is a decrease in the number of low and high level discharges and an increase in those of intermediate magnitude. The effect is associated with the deterioration of the dielectric. This change in the magnitude distribution is more rapid as the applied electric field is increased. Also, when the metal sphere is positive there are fewer pulses and the magnitude of the pulses is less than when the sphere is negative. The fact that an equal amount of charge is not involved on alternate half cycles is surprising. It is not due to faulty instrumentation. The difference in pulse magnitude due to polarity is associated with electron trapping and/or retention of positive charge by the dielectric. View full abstract»

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  • Thermal Endurance of Rigid Electrical Insulation

    Page(s): 19 - 28
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    The results of some of the work which guided the preparation of a Proposed Test Procedure for Thermal Evaluation of Rigid Electrical Insulating Materials is reported. Long-term thermal aging data for laminates is presented. It is found that om comparative thermal life is often dependent on property criterion and end-point. A Test Procedure should, therefore, provide universal data. It is concluded that AIEE ID requires revision. 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