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

Arrester Lead Design & Application

Once a decision is made to install a surge arrester of a particular type, design details when it comes to ideal mounting arrangement and how to deal with various line and earth lead issues can prove a challenge. These details can be made the more complex... Read More

Interaction of Line Surge Arresters with Vibration Dampers

Transmission line surge arresters (TLSAs) have become an important design and mitigation alternative to improve grounding and reduce investment in overhead ground wire. However, they have also been known to experience a number of mechanical problems in... Read More

Achieving Long Service Life from Transmission Line Arresters

Many transmission line surge arresters (TLSA) have been suspended from phase conductors, adding mass that creates a new mechanical node between insulator suspension clamps and Aeolian vibration dampers. This placement interferes with damper performance and... Read More

Understanding Energy Rating of Distribution Arresters

“What is the kJ/kV Uc rating of a Class 1, 10 kA arrester? This type of question has often been asked when it comes to distribution arresters. Yet finding an answer was never easy since these arresters (formerly referred to as Class 1) never had energy... Read More

Bosnian Utility Implemented Program to Monitor Condition of Station Arresters

To protect expensive assets at its substations, Elektroprenos BiH – the company operating the power system in Bosnia and Herzegovina – began installing metal oxide (MO) surge arresters in each of its HV transformer bays about 20 years ago. Over the years... Read More

Selecting Ratings for IEC Distribution Arresters

This article, contributed by arrester expert and co-Convener of TC37 MT4, Jon Woodworth, reviews what users can expect to find in IEC 60099-5 once this revised standard is published in several years time. Key elements of the updated standard are identified... Read More

Switching & Lightning Protection Using Externally Gapped Line Arresters

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... Read More

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