DGA course – e-lesson #8 – Selecting and using the proper DGA online device for your transformer

This lesson provides an overview of the dynamic online DGA (Dissolved Gas Analysis) industry, exploring its history and the challenges faced by manufacturers in developing reliable devices. Marius discusses the advantages and disadvantages of using online DGA devices, highlighting the importance of considering factors like cost, maintenance, and calibration. He delves into the technological advancements in online DGA, addressing issues such as sampling, time-dependent phenomena, and the need for accurate real-time monitoring. The presentation emphasizes the user's responsibility in selecting the appropriate online device based on the transformer's importance and loading regime, as well as the need for expert knowledge in interpreting the data. Marius also shares case studies of successful and unsuccessful online DGA devices, drawing lessons for both users and manufacturers. The session concludes with a Q&A session, allowing attendees to address their specific concerns.