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Insulators

Necessary Check Points & Testing to Screen Quality of Glass & Other Insulators

December 9, 2017 • ARTICLE ARCHIVE, Glass, InsulatorsComments Off on Necessary Check Points & Testing to Screen Quality of Glass & Other Insulators

Increasing demand for overhead transmission line components such as insulators has brought into the market new, previously often unknown suppliers. This has created a large spectrum of performance and quality that are not necessarily easy to identify relying only on existing standards or specifications. This is true for all insulator technologies. End user...

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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 rubber weathersheds. Is there cause for...

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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 system on an existing line route with a DC bi-pole to increase transmission capacity. While it is now...

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Composite Insulator Design for New U.K. Transmission Lines

November 18, 2017 • ARTICLE ARCHIVE, Insulators

Changes to generation over the next decade mean that there will be substantial investment in expanding and upgrading the U.K.’s transmission network. National Grid has embraced the need to harness innovation to build new and upgrade existing transmission...

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A Review of Insulator Failure Modes

November 11, 2017 • ARTICLE ARCHIVE, Article of the week, Insulators

There are three proven insulator technologies being deployed in delivery of electrical power throughout the world. Porcelain and glass insulators have been used since the start and have had a very good record of performance and reliability. In fact, the...

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Artificial Pollution Tests for Polymeric Insulators

November 11, 2017 • ARTICLE ARCHIVE, Commentary by Pigini, Insulators

A few years ago, CIGRE WG C4.303 published Brochure 555, “Artificial pollution test for polymer insulators: results of a round robin test”, reporting on comparative pollution tests conducted at seven laboratories on two silicone line insulator samples....

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Designing Composite Hollow Core Insulators for Pollution Performance under AC & DC

October 14, 2017 • ARTICLE ARCHIVE, Insulators

Composite housings are fast becoming a standard solution implemented in power grids worldwide and especially preferred for application in severely polluted service environments. To ensure performance under such conditions, the following design tests are...

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Insulator Test Station Helps Support Preventative Maintenance Strategy

October 14, 2017 • ARTICLE ARCHIVE, Insulators, Maintenance

While insulators account for less than 10% of the total cost of new overhead lines and substations, the potential consequences of their improper selection and poor performance are estimated to account for up to 60% of the Life Cycle Cost of these...

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