Identifying Quality Surge Arresters

June 16, 2018 • Arresters, ARTICLE ARCHIVEComments (0)

Power system engineers all face a similar dilemma at one time or other when trying to identify which product offers the quality they require – especially in today’s global market with its many competing suppliers. Yet making the right decision can prove vital to reliability and is even more important in the case of a ...

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Line Arresters Mitigate Ground Potential Rise on Towers & Improve Electricity Quality

June 9, 2018 • Arresters, ARTICLE ARCHIVE

The 1960s to 1970s saw rapid development of the French power system, with erection of many HV overhead lines and substations located mainly in the countryside. However, as towns expanded since the 1980s, many houses, factories, shopping malls and recreation...

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Best Practice in Lightning Protection for Distribution Systems

June 1, 2018 • Arresters, ARTICLE ARCHIVE

As demand for reliable power continues to grow worldwide, improving the lightning reliability of distribution systems becomes a more and more common exercise. This contribution to INMR by arrester expert, Jonathan Woodworth, reviews some of the options...

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Achieving Long Service Life for Transmission Line Arresters

May 26, 2018 • Arresters, ARTICLE ARCHIVE

Many transmission line surge arresters (TLSA) are suspended from phase conductors, thereby adding mass that creates another mechanical node between insulator suspension clamps and Aeolian vibration dampers. Such a placement can interfere with damper...

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Arrester − Transformer Separation Distance in Substations

May 19, 2018 • Arresters, ARTICLE ARCHIVE

How far from a transformer can arresters be located yet still ensure an adequate margin of protection? The answer is not so simple and requires some explanation. One rule of thumb is “locate the arrester as close to the transformer bushing as possible”....

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Optimizing Specification of Non-Gapped Line Arresters

May 12, 2018 • 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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Arrester Protection Distances at Substations

May 5, 2018 • Arresters, ARTICLE ARCHIVE

Protection against overvoltages using gapless zinc oxide surge arresters has been accepted and adopted worldwide. In particular, assets such as transformers, cables and gas-insulated substations are highly vulnerable to transient surges emanating from...

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Switching & Lightning Protection Using Externally Gapped Line Arresters

May 5, 2018 • 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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