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Utility Transformers


Advancements in Dissolved Gas Analysis: NEI & Gassing Events

One of the most important steps when looking at DGA data is to decide whether the data support the existence of a fault that is actively breaking down the insulation before you try to use a triangle, pentagon, or gas ratio method to identify a fault type. Otherwise, you are diagnosing random...

Zensol new instrument for OLTC testing

According to CIGRE A2.34, the dynamic resistance measurement or DRM (OFFLINE) is a test that offers diagnostics for several diverter or selector switch malfunctions such as: contact problems, broken springs, broken transition resistors, poor contact pressure, inadequate transition time, momentary...

Acutran Transformers: Built to Military Precision

Acutran is a veteran-owned custom designer and manufacturer of low- and medium-voltage dry-type transformers from 10VA to 3000kVA with voltages up to 25000V, inductors and reactors, and related components and services.The company was founded in 1983 and is now owned by Mike Evans, who is also the...

Utility Transformers

The importance of risk assessment and the role of Reliability-based DGA

By Chuck Hoeppner, Delta-X Research

It’s often said that you can’t manage what you can’t measure. But how does one manage risk in the mission-critical, 24x7 world of energy utilities? It’s a challenging undertaking, anticipating future demands and ensuring the reliability and resiliency of the energy infrastructure for increasingly power-intensive customers. The risks range from natural disasters to cyberattacks to equipment failure. Should a power transformer fail, consequences could include equipment damage, unplanned power outages,...

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Electrical transformer design and manufacturing

Acutran Transformers: Built to Military Precision

Acutran is a veteran-owned custom designer and manufacturer of low- and medium-voltage dry-type transformers from 10VA to 3000kVA with voltages up to 25000V, inductors and reactors, and related components and services.The company was founded in 1983 and is now owned by Mike Evans, who is also the...

Transformer testing and failure analysis

Power Transformer Failures

Electric utilities maximize utilization of their assets, while maintaining reliability. Power transformers are typically reliable, but have been known to fail suddenly and/or prematurely. Transformer failures are both costly and can leave customers dissatisfied, harming the reputation of a utility....

power plant

RMS Energy Responds to the Changing Engineering Needs of Customers

Today’s electrical infrastructure in the United States might have been viewed as a work of science fiction when the first commercial power grid was conceived and built in New York’s lower Manhattan in the 1880s. But it didn’t take long for fiction to become fact. Thomas...


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Case Study: Rapid Changes in Bushing Health

IntroductionContinuous online monitoring of bushings provides real-time information which can result in the early detection of a possible failure. Challenge: A Major AlarmA prominent U.S. utility was looking for a way to improve system reliability for their 138kV assets. They researched and...

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