IEEE Electrical Insulation Magazine

Issue 4 • July-Aug. 1993

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Displaying Results 1 - 5 of 5
  • Insulation systems and monitoring for stator windings of large rotating machines

    Publication Year: 1993, Page(s):7 - 15
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (934 KB)

    The condition of the insulation system frequently limits the useful life of the windings of a rotating machine. This is a function of thermal, electrical, environmental, and mechanical factors plus the type of duty to which the machine is subjected. The thermal classifications of the variety of insulating materials that make up an applied insulation system are presented. Strand and turn insulation... View full abstract»

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  • Design considerations, machinery and control options in coil winding

    Publication Year: 1993, Page(s):16 - 22
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    Coil winding machine design is dictated by a coil's complexity, material tension limitations, machine versatility, automation/operator intervention, production volume, and budgetary considerations. Winding machine designs, tensioner devices, coil winding patterns, and potential coil winding problems are explored. It is suggested that coil winding is an art with foundations in sound engineering pra... View full abstract»

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  • Electric motor repair industry update

    Publication Year: 1993, Page(s):23 - 24
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    The concerns of the typical rewind shop, or electric motor service center, identified through various surveys are reviewed. The issues discussed include energy and environmental issues, insulation concerns, winding patterns, and a renewed interest in stator core laminations.<> View full abstract»

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  • ASTM procedures for measurement of water vapor transmission through polymer films

    Publication Year: 1993, Page(s):25 - 26
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (207 KB)

    Two ASTM procedures for estimating the transmission of water vapor through polymer films are compared: ASTM Standard D-1653, Standard Test Methods for Water Vapor Transmission of Organic Coating Films, and ASTM Standard E-96, Standard Test Methods for Water Vapor Transmission of Materials. Both have been identified as recognized methods for estimating performance. The objective is to ascertain whe... View full abstract»

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  • Partial discharge. XVII. The early history of partial discharge research

    Publication Year: 1993, Page(s):27 - 31
    Cited by:  Papers (18)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    For pt.XVI see ibid., vol.9, no.3, p.21 et seq. (1993). Early investigations into partial discharge (PD) phenomena are reviewed to illustrate how little has changed and how much has, in some respects, been repeated during the forty years from 1940 to 1980. The early days of PD research included studies of PD in gas-filled cavities in oil-impregnated paper insulation, broad studies of PD in high vo... 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