Editorial Columns

What to Do When Molded Insulators Become a Home for Mold

December 8, 2017 • ARTICLE ARCHIVE, Hollow Core Issues, Insulators

Over the past fifteen years, as the application of hollow core composite insulator technology has begun to skyrocket, there have been periodic reports of mold and other biological growths appearing on their silicone...

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Preferred Insulators for DC Line Applications

December 2, 2017 • ARTICLE ARCHIVE, Insulators, Reporting from CIGRE

When it comes to DC line applications, there are ‘pure’ DC connections and also ‘hybrid’ connections – the latter being a solution to replace an AC...

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Corona Shielding for HVDC Line Insulators

December 2, 2017 • ARTICLE ARCHIVE, Commentary by Pigini, Corona

Power utilities and insulator manufacturers continue to express differing views as to the relative value of shielding electrodes in DC. So, to help settle this...

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What’s Next After Succession of Different Arrester ‘Eras’?

November 25, 2017 • Arresters, ARTICLE ARCHIVE, Woodworth on Arresters

Like many other things, the surge arrester was born of necessity. But while most might guess that arresters were introduced around the late 1800s when power...

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‘Externalities’ of Overhead Power Lines

November 25, 2017 • ARTICLE ARCHIVE, Commentary by Pigini

Public opposition and growing environmental awareness now make identifying corridors for new overhead lines an increasingly complex process – especially near...

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Quantification of Hydrophobic Properties

November 18, 2017 • ARTICLE ARCHIVE, Editorial Columns, Reporting from CIGRE

Hydrophobicity is perhaps the single most recognized property of polymeric materials used for outdoor insulation since it provides added value in terms of...

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Dealing with Deterioration of Silicone Insulation in Critical Applications

November 18, 2017 • ARTICLE ARCHIVE, Reporting from CIGRE

Field experience with composite insulators having polymeric housings is available now for about 40 years and the clear trend is that silicone rubber has become...

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Dielectric Strength & Air Density

Dielectric Strength & Air Density

November 11, 2017 • ARTICLE ARCHIVE, Commentary by Pigini

While a number of atmospheric parameters can affect the dielectric strength of external insulation, relative air density (δ) and absolute humidity are...

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