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Insulators

Non-Soluble Surface Deposits on Insulators

August 11, 2018 • ARTICLE ARCHIVE, InsulatorsComments (0)

High voltage engineers well understand that insulators usually remain quiescent when dry – even if highly polluted. However, they can quickly light up with partial discharge activity once dirty surfaces are wetted by rain or condensation. The extent of such discharge activity will depend on whether the surfaces are hydrophilic, allowing continuous water...

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Biological Growths on Composite Insulators

August 4, 2018 • ARTICLE ARCHIVE, Insulators

Composite insulators have become common on overhead lines as well as at substations due to application advantages and their attractive acquisition costs. However, the nature of polymeric housing materials is that premature ageing can be a problem if...

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Composite Insulators in Innovative Tower Solutions & Line Uprating

August 4, 2018 • ARTICLE ARCHIVE, Insulators

The advent of composite insulator technology started in the U.S. but soon spread to Germany and France. Initial acceptance was slow as products went through the ‘teething’ problems typical of every innovation. Also, prices were originally prohibitively...

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Energy (Insulators) & Meteorology

August 4, 2018 • ARTICLE ARCHIVE, Insulators

Over the past 25 years, there have been several tendencies when it comes to R&D for electrical power systems. A first phase during the 1990s focused on product innovation and examples of this are composite insulators and zinc oxide arresters. A second...

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Progress in Insulator Technology & Ongoing Need for Standards

August 4, 2018 • ARTICLE ARCHIVE, Insulators

This article from October 2017, contributed to INMR by Dr. Jens M. Seifert of IEC TC 36 ‘High-Voltage Insulators’, assessed the state of technology in this field and how suitable standards allow for continued progress. Background TC 36...

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Resistivity Measurement of Conductive Silicones

August 4, 2018 • ARTICLE ARCHIVE, Insulators

Modern cable accessories and connectors are being manufactured using a broad range of silicone elastomers and auxiliary materials – from fluids to gels to pastes. Those such elastomers that contain electrically conductive fillers (generally referred to as...

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Changes Coming to Insulator Standards

July 28, 2018 • ARTICLE ARCHIVE, Insulators

Standards have the greatest long-term impact on any industry as well as on the products offered in the marketplace. In this regard, quality of standards automatically defines customer trust and acceptance of the products they purchase. The general rule: “No...

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Pollution Flashover of Insulators

July 28, 2018 • ARTICLE ARCHIVE, Insulators

The surfaces of insulators operating for years on power networks inevitably become polluted to some degree. Accumulation of contaminants is especially serious in coastal areas or where there are nearby industrial emissions or major highways. Under damp...

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