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SFRA Ratio – A Simple Test to Identify a Winding with Shorted Turns
SFRA testing is a powerful and sensitive method for assessing the mechanical and electrical integrity of transformer core/coil assemblies. The two most commonly used tests are the open-circuit and...
View ArticleAssessing Transformer Condition – Part 2: Dissolved Gas Analysis (DGA)...
DGA is arguably the most powerful tool in the industry when it comes to assessing transformer condition. Commonly performed according to ASTM D3612C, and known as the headspace method (also detailed in...
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Single-Phase Exciting Current Components Extraction
Enhancing Diagnostic Power of Exciting Current and Loss Test on Power Transformers Introduced in 2017, the extraction of exciting current components opens the door for a further enhancement of...
View ArticleAssessing Transformer Condition – Part 1: Common Tests & Best Practices to...
Transformers are subjected to electrical, thermal, and chemical stresses during their operational life that degrade the insulating oil and solid insulation, cause corrosion and oxidation, and create...
View ArticleFive Ways INSIDEVIEW Brings Clarity from Complexity in Insulating Liquid...
Dissolved gas analysis (DGA) and insulating material laboratory diagnostic testing are arguably the most important tools for identifying incipient fault condition and managing risk of critical,...
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F8000 Command Module: The Gateway to Next Gen Protection Testing
Modern protective relays are computer devices capable of immense functionality. In the decades since microprocessor technology first made impacts on relay designs and applications in protection...
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Cyber Threats on the Rise: Invest Now to Boost Power Grid Defenses
Critical infrastructure security is in the national spotlight. In 2020, the power grid and energy sector was the third most targeted sector for cyber-attacks, up from ninth place in 2019, and the...
View ArticleSimon Sutton Confirmed as the Next CIGRE D1 Study Committee Chairman
CIGRE, the collaborative global community for power systems professionals, recently announced that Dr Simon Sutton, Doble’s Technical Director EMEA, has been appointed as the next Study Committee...
View ArticleMicrogrids – Old Concept on Steroids
Background Microgrids are gaining ground with each passing year in different parts of the world. In the United States, one of the main drivers that advanced the concept of microgrid was Hurricane...
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Shedding Light on Protection System Maintenance Data
Protection and control (P&C) asset management is tricky. Philosophies, devices, and schemes vary; protection engineering and maintenance activities generate data differently, constantly....
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