IEEE Electrical Insulation Magazine

Issue 5 • Sept.-Oct. 1989

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  • A discharge locating probe for rotating machines

    Publication Year: 1989, Page(s):14 - 17
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (479 KB)

    The basic principles of an improved Tennessee Valley Authority (TVA) probe known as the discharge locating (DL) probe are presented. The principal features of the new device are very-high-frequency detection using a capacitive sensor and microprocessor-based signal processing. These features are intended to make the probe easier to use and less ambiguous in the interpretation of results. The coupl... View full abstract»

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  • Sulphur hexafluoride: introduction to the material and dielectric

    Publication Year: 1989, Page(s):18 - 21
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    The basic principles of SF/sub 6/ as a dielectric gas and arc-interrupting medium are examined. The properties discussed are its high dielectric withstand of approximately=90 kV/cm-bar, its dielectric strengthafter decomposition, its suitable operating temperature range, its nontoxicity and chemical inertness, and the large amount of energy required to decompose SF/sub 6/ into a plasma. The basic ... View full abstract»

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  • Compression bonding process for manufacture of high-performance electrical coils

    Publication Year: 1989, Page(s):22 - 28
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (585 KB)

    The use of compression bonding to improve the performance of electromechanical devices by producing temperature-resistant, high-strength coils with great precision is discussed. The process provides coils of higher density, which are better able to dissipate the heat caused by higher current levels and can be placed closer to the target of the magnetic flux they produce by virtue of their more pre... View full abstract»

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The EI Magazine publishes articles written by authors from industry, research institutes and academia. The articles are more practical in content than the papers published in the Transactions.

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Edward Cherney

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Robert Fleming