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  • Revising IEC 60815

    October 13, 2018 • ARTICLE ARCHIVECommentary by PiginiEditorial Columns

    Specifications contained in IEC 60815 “Selection and dimensioning of high-voltage insulators intended for use in polluted conditions” are the result of work going back to 2000 when international experts in WG11 first started to set… Read More

  • Jean-Marie George Receives Claude de Tourreil Memorial Award for 2018

    October 5, 2018 • ARTICLE ARCHIVE

    INMR is pleased to announce that Jean-Marie George, Scientific Director at Sediver, has been selected as recipient of the 2018 Claude de Tourreil Memorial Award for Lifetime Achievement in the Field of Electrical Insulators. This… Read More

  • Digital Modeling in Insulation System Design

    October 5, 2018 • ARTICLE ARCHIVECommentary by Pigini

    Given the evolution in computing power and specialized software, finite element analysis (FEA) has evolved from what used to be a mainly academic pursuit into a much-used tool for product development. Engineering simulation technology, for… Read More

  • Applying RTV Silicone Coatings to Restore Degraded Composite Housings

    October 5, 2018 • ARTICLE ARCHIVEHousingUtility Practice & Experience

    Since the early 1990s there has been growing application of composite-housed HV apparatus at substations. This has particularly been the case for instrument transformers where the safe failure mode of a silicone housing compared to… Read More

  • Dealing with Hybrid Grids

    October 5, 2018 • ARTICLE ARCHIVEFrom the World of TestingTesting

    Many in our industry predict the future will bring greater blending of technology and hybridization. But what does hybridization mean in power systems? And what are its implications for testing? To answer, it is important… Read More

  • Substation Changed CT Technology to Resolve Problems of Oil Leaks

    September 29, 2018 • ARTICLE ARCHIVESubstationUtility Practice & Experience

    Oil leaking from current transformers presents a problem not only from the obvious maintenance perspective but also in terms of environmental impact. One Chinese power utility faced with exactly such a situation at one of… Read More

  • Mediterranean Test Station Provides Challenging Environment for Electrical Insulation

    September 22, 2018 • ARTICLE ARCHIVEHV/HP TestingTest

    In spite of years spent developing sophisticated laboratory tests to reproduce the stresses faced by network components in service, many power engineers still believe that experience at an outdoor test station offers the definitive measure… Read More

  • Station Experience with RTV-Coated Glass Insulators

    September 22, 2018 • ARTICLE ARCHIVEGlass

    Application of a room temperature vulcanized silicone (RTV) coating to toughened glass cap & pin insulators has become a widely-recognized solution to prevent contamination flashovers in polluted service environments. Such coatings impart hydrophobic properties to… Read More

  • External Insulation Under Composite AC Plus DC Voltages

    September 22, 2018 • ARTICLE ARCHIVECommentary by Pigini

    Growing interest in parallel routing of AC and DC circuits on the same towers of what are referred to as ‘hybrid overhead lines’ could cause both AC and DC voltage components (known as composite voltages) to… Read More

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