IEEE Electrical Insulation Magazine

Issue 3 • May-June 1989

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Displaying Results 1 - 5 of 5
  • Digital recording techniques for electrical insulation measurements

    Publication Year: 1989, Page(s):9 - 17
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (879 KB)

    The problems of measuring the characteristics of transient voltage and current waveforms occurring in high-voltage power systems are discussed, and the analog recorders that have been used in the past are reviewed. The theory of operation of digital recorders is described, and sources of recording errors are examined. Applications of digital oscilloscopes to measuring switching surges and partial ... View full abstract»

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  • Progress of magnet wire technology in Japan

    Publication Year: 1989, Page(s):18 - 26
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (845 KB)

    Trends in magnet wire demand in Japan are examined, focusing on the characteristics of the enamels discussed. Applications of enamels experiencing growing demand are described. These are the fine polyester, polyesterimide, and polyamideimide enamels. Applications of bondable, ceramic-insulated, and other wires are also considered. Current Japanese industrials are tabulated.<> View full abstract»

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  • PCBs replacement liquids-how to determine their toxicity?

    Publication Year: 1989, Page(s):27 - 29
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The tests currently used to evaluate toxicity and ecotoxicity of polychlorinated biphenyls are reviewed. Distinction is made among acute toxicity, subacute toxicity, mutagenicity, and carcinogenic effects. The significance of the values obtained is briefly discussed.<> View full abstract»

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  • Trickle impregnation of small motors

    Publication Year: 1989, Page(s):30 - 35
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (886 KB)

    Trickle impregnation is a method of coating the windings of armature and stator components with a solventless polyester or epoxy resin. The process involves preheating the windings, dispensing a measured amount of resin, and heat-curing the resin. The advantages of trickle impregnation are presented and the materials used (polyesters and epoxies) are detailed. Three machine configurations that hav... View full abstract»

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  • EPRI report-amorphous core transformers show promise

    Publication Year: 1989, Page(s):36 - 38
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    A joint project to develop amorphous steel core distribution transformers was begun in 1983. The initial effort was to construct 25-kVA pad-mounted pre-prototype transformers using a continuous-wound core of cruciform cross section made of one-inch-wide Metglas material. A pilot manufacturing facility was designed and construction completed in the fall of 1985. One thousand 25-kVA pole-mounted, 76... View full abstract»

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Aims & Scope

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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Co-Editor-in-Chief
Edward Cherney

Co-Editor-in-Chief
Robert Fleming