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    E-lesson

    L2 TCA Course – e-lesson #10 – Dissolved Gas Analysis and Oil Quality

    L2TCA Course - e-lesson #10 - illustration 850 x 400
    Course: Master’s level

    Hosted by: Jon Giesecke / Free

    In this lesson from Transformers Academy, Jon Giesecke introduces the critical topic of dissolved gas analysis (DGA) and oil quality in transformers. As a seasoned expert with decades of experience in transformer maintenance, Jon shares insights into the evolution and importance of DGA, a technique developed to assess transformer health by analyzing gases dissolved in the oil. He explains the key indicators, such as hydrogen, methane, and acetylene, which signal potential issues like overheating or electrical faults. Jon also covers proper sampling methods, highlights the role of DGA in diagnosing and preventing transformer failures, and offers practical advice for interpreting gas concentrations. This lesson aims to provide both foundational knowledge and practical applications for professionals involved in transformer testing and maintenance.

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    Main takeaways:

    1. provide an understanding of oil sampling process
    2. discussion concerning galvanic action in the sampling area
    3. understanding combustible gas generation
    4. understanding moisture and oxygen degradation
    5. understanding air in leakage
    6. understanding load tap changer oil issues
    7. voltage regulator and oil circuit breaker testing

    Keywords: DGA, Furan analysis, oil sampling

     

    About the author

    Jon Giesecke

    Jon Giesecke

    Mr. Giesecke is one of the world’s leading experts in combining technologies used in the in-service inspection of high voltage oil-filled power transformers and substation diagnostics. He has been training personnel worldwide in these methods for over 20 years with great success.

    Prior to forming JLG Associates LLC in 2006, Giesecke was employed by EPRI Solutions as a senior project manager in the Substation Predictive Maintenance business area.

    As a Senior Project Manager, some of his responsibilities included: the development and implementation of the Substation Predictive Maintenance Program (SPdM) at numerous electric utilities in the U.S. and abroad; Developing and Instructing an EPRI Solutions’ SPdM course; instructed portions of the EPRI Transformer Performance Monitoring and Diagnostics course and the EPRI Substation/Switchyard Predictive Maintenance course; Providing training, services and consulting to evaluate maintenance responsibility and advanced programs applied to switchyard/substation components.

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