Field Experience with EGLA Type Arresters in Mexico

October 14, 2017 • Arresters, ARTICLE ARCHIVEComments Off on Field Experience with EGLA Type Arresters in Mexico

Lightning has been a main cause of outages on transmission and distribution lines across the globe. In Mexico, for example, data from the Comision Federal de Electricidad (CFE) show that lightning caused more than 50% of registered line failures. To reduce these types of outages, CFE began applying externally gapped line arresters widely about 10 ...

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Tridelta Surge Arrester

Surface Temperature Considerations for Surge Arresters

October 7, 2017 • Arresters, ARTICLE ARCHIVE

Monitoring the health of MOV arresters over the past few decades has been dominated by measurement of third harmonic currents, better known as leakage current. Unfortunately, this method is complicated by the fact that the arrester needs to be isolated from...

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Application of Arresters on Transmission Lines in Korea

October 2, 2017 • Arresters, ARTICLE ARCHIVE

Increasing quality of power equipment and improved maintenance practices on the Korean transmission grid have helped reduce incidence of line problems. However, the majority of transmission lines in that country pass through forested areas where they are...

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Specifying IEC Certified Arresters

September 23, 2017 • 25 Years of INMR, Arresters

Purchasing specifications for surge arresters are typically comprehensive but often request information that is no longer needed or even appropriate when it comes to MOV type units. This article by Jonathan Woodworth offers recommendations on how to specify...

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Figure 6: Non-gapped line arrester (NGLA). CLICK TO ENLARGE

Considerations in Arrester Lead Design & Application

September 15, 2017 • Arresters, ARTICLE ARCHIVE

Once a decision is made to install a surge arrester of any particular type, the various design details that follow can prove challenging – as for example when it comes to ideal mounting arrangement or how best to deal with various line and earth lead...

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Benefits Justify More Use of Transmission Line Arresters

September 15, 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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Technology & Application Review of Arresters that Extend Life of Cables

September 9, 2017 • Arresters, ARTICLE ARCHIVE

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...

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Interaction of Vibration Dampers with Surge Arresters

August 26, 2017 • Arresters, ARTICLE ARCHIVE

Most transmission line surge arresters (TLSA) have been installed somewhere between the clamps and the Aeolian vibration dampers, without consideration of the fact that line tensions are higher than on distribution lines. Undesired interactions can then...

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