Insulators
August 11, 2018 •
ARTICLE ARCHIVE, Insulators •
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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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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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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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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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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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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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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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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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