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Substation Testing & Maintenance


Selecting Substation Medium-Voltage Switchgear: GIS vs. AIS

Understanding differences between GIS and AIS in five points BY GAETAN DJENANE, Schneider Electric, Inc. Many considerations must be taken into account before selecting the electrical medium-voltage (MV) switchgear that best meets a user’s needs. From a management perspective,...

Electrical Substation Maintenance

Improving safety and methodology techniques to protect utility workers BY LARRY LAWRENCE, Lineman’s Testing Laboratories of Canada In 1990, many workplace safety hazards were consistently ignored as if they were “acceptable risk” and an expected part of a worker’s daily routine. Not...

Leakers, What a Mess!

Electric Substation apparatus, transformers and circuit breakers, are the workhorses of the electric transmission grid. Our focus in this article is on the issue of dielectric media leaks. Specifically, oil in large power transformers and oil or SF6 gas in power circuit breakers. Oil and gas leaks...

Substation Testing & Maintenance

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Case Study: Rapid Changes in Bushing Health

Introduction
Continuous online monitoring of bushings provides real-time information which can result in the early detection of a possible failure.

Challenge: A Major Alarm
A prominent U.S. utility was looking for a way to improve system reliability for their 138kV assets. They researched and reviewed options available on the market that included affordable bushing monitoring. After review, the utility chose to pilot the Dynamic Ratings’ C50 Transformer Monitor to see if it was worth the...

Related Articles


transformer oil

Leakers, What a Mess!

Electric Substation apparatus, transformers and circuit breakers, are the workhorses of the electric transmission grid. Our focus in this article is on the issue of dielectric media leaks. Specifically, oil in large power transformers and oil or SF6 gas in power circuit breakers. Oil and gas leaks...

Properly Grounded Substations

Adequate utility grounding improves power quality, but more importantly, it is essential for worker safety as well as public protection. Design is critical in maintaining a safe equipotential environment all around the substation. Construction is important to accommodate fault currents without...

Condition Monitoring in an Age of Modernization How (and why) to Adapt

The widespread application and use of electricity, which may now seem like a simple commodity, is considered one of the greatest technical developments of all time. However, keeping up with today’s demand for power is anything but simple: a vast amount of resources goes into maintaining a...


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...

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...

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