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IEEE Electrical Insulation Magazine

Issue 5 • Sept.-Oct. 1993

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Displaying Results 1 - 5 of 5
  • Effect of ageing conditions on the type of water treeing (power cables)

    Publication Year: 1993, Page(s):7 - 13
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (763 KB)

    A concept is presented that can serve as a tool in discussions of the improvement of materials and tests to prevent water treeing in underground power cables. It describes the ways in which ageing conditions, processes, and degradation characteristics are related. The concept is based on an extensive collection of experimental data, which show that water trees grown under different conditions have... View full abstract»

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  • Observation of water tree growth in polyethylene in real time

    Publication Year: 1993, Page(s):14 - 16
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (892 KB)

    The growth of water trees that lead to breakdown in polyethylene insulation of underground power cables is studied in real time, using a special observation cell for polyethylene that can be placed on the stage of a conventional microscope. The growth of the water tree was followed by time-lapse photography. Sample results are given. The water tree is shown to grow from a single streamer to a bush... View full abstract»

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  • New developments in medium and high voltage cable with laminate sheaths as moisture barriers

    Publication Year: 1993, Page(s):17 - 28
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1292 KB)

    The development of medium- and high-voltage cables with moisture barriers as a countermeasure to water treeing is reviewed. The moisture barrie can take traditional forms, including extruded or welded metallic tubes. The latest moisture-barrier cable designs use laminate sheaths. The traditional design approaches and the evolution of the laminate sheath are discussed. The various designs, under-ja... View full abstract»

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  • The chemistry of ethylene propylene insulation. I

    Publication Year: 1993, Page(s):31 - 34
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (371 KB)

    The history, polymeric structure, and properties of ethylene-propylene rubber are reviewed. Polymer variables such as crystallinity, molecular weight, molecular weight distribution branching, and diene type and level are discussed.<> View full abstract»

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  • The Canadian Electrical Association: a leader in cable research

    Publication Year: 1993, Page(s):35 - 38
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    The history and cable research efforts of the Canadian Electrical Association (CEA) are reviewed. Since the inception of the first cable research project in 1977, the CEA and its cosponsors have funded 409 research programs. Research topics have included detectors for underground faults, water tree inhibitors, cable identification methods, ageing of cross-linked polyethylene (XLPE) cables, rural u... 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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Edward Cherney

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Robert Fleming