Substation Testing & Maintenance
Power Factor Testing of Circuit Breakers
Effective and Safe Testing of GIS Switchgear
Substation Testing & Maintenance

Circuit Breaker Time and Motion Testing
Determining mechanical condition of high-voltage circuit breakers
BY JOZEF LEVI, Doble Engineering Company
Life expectancy of a newly installed high-voltage circuit breaker is approximately 40 years. Throughout its life, under normal circuit conditions, the circuit breaker will operate less than ten minutes. During abnormal circuit conditions, the breaker will operate less than one minute in its lifetime.
The primary goal of circuit breaker testing is to determine the condition of the circuit breaker. Breakers have...
Related Articles

Effective and Safe Testing of GIS Switchgear
To fully assess the functionality of medium and high voltage circuit breakers, various mechanical and electrical parameters must be tested. Gas-insulated switchgear (GIS) in particular poses unique and special challenges, including the connection of the test equipment. In today‘s world, where...

FERC Complaint Targets Duke, PJM Transmission Planning
A coalition of large energy consumers and ratepayer advocates has filed a complaint with the Federal Energy Regulatory Commission (FERC), urging the agency to prohibit transmission owners from independently planning "local" transmission projects exceeding 100 kilovolts (kV). The coalition argues...

High Voltage Direct Current (HVDC) Substations: Revolutionizing Long-Distance Power Transmission
High Voltage Direct Current (HVDC) technology is revolutionizing long-distance power transmission, offering improved efficiency and reliability over traditional alternating current (AC) systems. This article explores the latest developments and applications of HVDC substations, providing a...

Contact Material Recycling and Sustainability in Electronics
The electronics industry is experiencing rapid growth and innovation, with devices becoming more advanced and ubiquitous. As this industry continues to flourish, it’s crucial to consider the environmental impact of electronic manufacturing and the materials used in these devices. One area...

FERC Complaint Targets Duke, PJM Transmission Planning
A coalition of large energy consumers and ratepayer advocates has filed a complaint with the Federal Energy Regulatory Commission (FERC), urging the agency to prohibit transmission owners from independently planning "local" transmission projects exceeding 100 kilovolts (kV). The coalition argues...

High Voltage Direct Current (HVDC) Substations: Revolutionizing Long-Distance Power Transmission
High Voltage Direct Current (HVDC) technology is revolutionizing long-distance power transmission, offering improved efficiency and reliability over traditional alternating current (AC) systems. This article explores the latest developments and applications of HVDC substations, providing a...

Cybersecurity in Modern Substations: Protecting the Grid from Emerging Threats
As substations become more interconnected and automated, they are increasingly vulnerable to cyberattacks. These critical nodes of the power grid are essential for ensuring a stable and reliable energy supply, making their protection paramount. This article delves into the latest cybersecurity...

Grid-Scale Battery Storage Systems and Their Impact on Substation Operations
The transition to renewable energy is reshaping the power landscape, with grid-scale battery storage systems playing a pivotal role in this transformation. These systems are crucial for balancing supply and demand, particularly at the substation level, where they enhance grid stability and...

The Role of Digital Twins in Substation Management and Grid Optimization
In recent years, digital twin technology has emerged as a game-changer in various industries, and the power sector is no exception. Digital twins are transforming the way substations are managed by creating virtual replicas that provide insights into performance and potential issues. This article...

Contact Material Recycling and Sustainability in Electronics
The electronics industry is experiencing rapid growth and innovation, with devices becoming more advanced and ubiquitous. As this industry continues to flourish, it’s crucial to consider the environmental impact of electronic manufacturing and the materials used in these devices. One area...