IEEE Electrical Insulation Magazine

Issue 4 • July-Aug. 1989

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  • Conductor insulation tests in oil: aramid vs. kraft

    Publication Year: 1989, Page(s):10 - 14
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    Developments in transformer insulation, leading to increased use of aramid insulation in oil-filled transformers, are briefly summarized. A series of tests designed to gather data on the dielectric strength of aramid paper in oil used as turn-to-turn insulation is presented. The test setup, sample configuration and preparation, and test procedures are described. Turn-to-turn and coil-to-coil resul... View full abstract»

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  • Transformer fluids

    Publication Year: 1989, Page(s):16 - 19
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (349 KB)

    Historically, the standard fluids used in transformers were low-viscosity, petroleum-based oils. For many years, askarels, made up of a group of synthetic, fire-resistant fluids, were used in applications where flammable mineral oils were not desired or acceptable. These askarals, which were aromatic hydrocarbons known as polychlorinated biphenyls (PCBs), fell into disfavor owing to environmental ... View full abstract»

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  • Development of a closed AC 2000 kV testing facility

    Publication Year: 1989, Page(s):20 - 21
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (165 KB)

    A description is given of a recently completed facility for testing cross-linked polyethylene insulated cables (CV cables). The main body of the facility is an AC 2000 kV transformer. A closed SF/sub 6/ gas-insulated (GIL) bus connects to it, and a testing cable is slipped onto its edge. A standard capacitor connects to the GIL to measure the tan delta of the testing cable. The facility adopts a n... 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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