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Line Leakage Testing: Is It Right For Your Application

The Line Leakage test (LLT for short) is most often specified to be performed as a type test in a design or engineering laboratory or as a routine production line test on medical devices right before they ship. Not as commonly performed as a Dielectric Withstand or Ground Bond test in a production environment, LLT can cause some confusion for engineers and technicians alike.

However, technological advancements have begun to lessen the outward complexity of...

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Renewable Energy News

Solar for All Protected from Trump's IRA Rollback

In December 2024, the U.S. Environmental Protection Agency (EPA) announced that the $7 billion "Solar for All" program is set to begin implementation early next year. This initiative aims to install solar panels in nearly a million low-income households over the next five years, significantly...

T&D Trends



Electrical Substations

Digital Twins for Substations: Bridging the Physical and Digital Worlds

In the rapidly evolving landscape of power grid management, digital twin technology is emerging as a game-changer for substations. By creating virtual replicas of physical assets, digital twins bridge the gap between the physical and digital worlds, enabling enhanced operational efficiency and asset management. This article examines the application of digital twin technology in substations, its benefits for real-time monitoring, scenario analysis, and predictive maintenance, integration with grid management systems and IoT devices, and examples of successful implementations and their impact on substation performance.

Discover how modern substations are evolving through virtualization, process bus systems, and advanced cybersecurity in our digital substation feature article.

Overview of Digital Twin Technology and Its Application in Substations
A digital twin is a dynamic, virtual model of a physical asset, system, or process that mirrors its real-time status, operation, and performance. In the context of substations, digital twins replicate components such as transformers, circuit...

Electrical Substations Articles


Breakers & Relays

Dynamic Resistance Measurement

Condition testing of circuit breaker’s arcing contacts BY BUDO MILOVIC, DV-Power The preventive maintenance on a high-voltage (HV) breaker consists of several routine tests. The timing and motion tests are methods used to assess the breaker’s mechanical condition. When the timing and motion...
Substation Technologies

Power Factor Testing of Circuit Breakers

Detecting contamination and deterioration in SF6 breakers to ensure longevity BY LINDA NOWAK, Doble Engineering Company The purpose of “Doble testing”, or power factor testing, SF6 (sulfur hexafluoride) circuit breakers is to detect the presence of contamination and/or deterioration of the...