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Arresters

PPC Insulators

Specifying IEC Certified Arresters

When a tender is issued for surge arresters, numerous characteristics need to be specied. But not all are of equal importance. Some characteristics are mandatory while others bring little practical value for the application intended. For example, if an... Read More

Monitoring Condition of Surge Arresters

Metal oxide surge arresters have high reliability and will function as intended almost indefinitely, assuming that they have been well designed, properly manufactured and operated within their specified range of applied voltage, temporary overvoltage, surge... Read More

Considerations in Measuring Arrester Surface Temperature

While thermal imaging has been used as a practical, cost-effective means of assessing the health of arresters for more than a decade, there has been relatively little effort to determine what is a good or bad surface temperature profile. This article,... Read More

Field Experience with EGLA Type Line Arresters in Mexico

In many countries across the globe, lightning is a leading cause of transmission and distribution line outages. In Mexico, for example, the Comisión Federal de Electricidad has estimated that more than 50% of line failures have traditionally been linked to... Read More

Arrester Housing Design & Application

Arrester housings are insulators but have properties and design parameters that are not common to insulators. While a composite insulator is made primarily of polymer rubber on the outside and a fiberglass rod or tube on the inside, polymer-housed arresters... Read More

Optimizing Specification of Non-Gapped Line Arresters

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... Read More

Condition Assessment of Substation Surge Arresters

The metal oxide surge arrester (MOSA) is a comparatively inexpensive component within a modern power system. Typically, it is specified, purchased and installed – but then overlooked when planning condition monitoring of assets at a substation. However, an... Read More