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Arresters

Technology & Application Review of Arresters that Extend Life of Cables

August 19, 2017 • Arresters, ARTICLE ARCHIVEComments (0)

There are basically three types of arresters used to protect high voltage power cables. The first, known by two names – deadfront (IEEE) or separable (IEC) arresters – is used primarily on distribution systems and often found in pad-mounted cabinets. The second type, much less common, is used for cable protection and called a sheath ...

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Benefits Justify More Use of Transmission Line Arresters

August 12, 2017 • Arresters, ARTICLE ARCHIVE

Application of gapped (EGLAs) or non-gapped (NGLAs) transmission line surge arresters (TLSAs) offers perhaps the best opportunity for power engineers to improve system reliability. However, as important as this may be, the value of using them transcends this...

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Optimizing Specification of Non-Gapped Line Arresters

July 29, 2017 • Arresters, ARTICLE ARCHIVE

In spite of a range of remedial measures, lightning remains one of the leading causes of line tripping disturbances. Therefore, solutions to lessen its impact remain a priority for line designers and power system operators across the globe. Installation of...

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Past Experience at Canadian Utility with Surge Arresters on Transmission Lines

July 22, 2017 • Arresters, ARTICLE ARCHIVE, Utility Practice & Experience

This past INMR article contributed by John Williamson, former Manager of Transmission Engineering at NB Power, described the experience at a Canadian utility regarding application of surge arresters on 69 kV and 138 kV transmission lines over a 6-year period....

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Quality of Metal Oxide Disks Impacts Surge Arrester Performance

July 22, 2017 • Arresters, ARTICLE ARCHIVE

While external design is essential to how reliably a surge arrester performs in service, its electrical characteristics depend largely on the properties of the internal metal oxide resistors. These ceramic disks are sophisticated electronic devices...

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Switching & Lightning Protection Using Externally Gapped Line Arresters

July 15, 2017 • Arresters, ARTICLE ARCHIVE

The goal of a lightning proof transmission line has been attainable since the early 1990s when the first polymeric-housed transmission line arresters became available. Indeed, based on IEEE 1410 and IEEE 1243, installation of arresters on every phase of every...

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Forensic Analysis of Failed Surge Arresters

Forensic Analysis of Failed Surge Arresters

July 8, 2017 • Arresters, ARTICLE ARCHIVE, Article of the week

Arresters are essentially devices to divert lightning and switching surges and can sometimes become overloaded to the point of failure. Whenever this occurs, it’s extremely useful to properly determine the reason why the arrester (or companion arresters)...

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Importance of Line Entrance Arresters

July 1, 2017 • Arresters, ARTICLE ARCHIVE, Woodworth on Arresters

At most air-insulated substations, the arrester mounted at the transformer is close enough to other equipment to provide effective protection from flashover. However this applies only if the breakers are closed. If a breaker is open, the insulators on its...

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