Editorial Columns

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Characterizing Pollution Severity Needs More than Simply Relying on ESDD

Properly characterizing and measuring the pollution affecting overhead lines and substations is of great importance when specifying insulators to minimize risk of pollution flashover. While there are several relevant parameters to assess pollution severity,... Read More

Digital Modeling in Insulation System Design

Given the evolution in computing power and specialized software, finite element analysis (FEA) has evolved from what used to be a mainly academic pursuit into a much-used tool for product development. Engineering simulation technology, for example, now allows... 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

Simulation Versus Laboratory Testing

The transmission and distribution sector faces a constant challenge to deliver reliable as well as affordable electrical power. Hence, it is always looking how best to improve on both. Standards-based certification of equipment has traditionally been viewed... Read More

Composite Materials for Transmission Conductors

Most power engineers can claim to have seen the birth, development and in some ways maturing of insulator technology based on composite materials. More recently, there has been a new wave unfolding that involves use of composite materials for conductors. The... Read More

Insulators for DC Line Applications

When it comes to DC line applications, there are ‘pure’ DC connections and also ‘hybrid’ connections – the latter being a solution to replace an AC system on an existing line route with a DC bi-pole to increase transmission capacity. While it is now... Read More

Nanotechnology & Insulators

The term ‘nano’ seems ubiquitous these days and has attained great marketing power. Consequently, it is difficult for almost any product or area of study to be too far removed from it. Insulators are no exception. The seeds of nanotechnology were probably... Read More

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