Vaisala power transformer monitoring experts, Senja Leivo and Steven Jiroutek answered the most pressing questions from the audience related to moisture in transformer oil in our Q&A webinar.
We invite you to follow the whole webinar, which is available on-demand, and here are just a few examples of the types of questions that were asked:
Q: How can we monitor real time moisture transport between the cellulose paper, pressboard, wood support structures during transformer overload?
A: Online moisture monitoring in the oil circulation gives good indication on how much water is released from paper and other cellulose material surfaces. Moisture from inner parts of paper, pressboard or wood will not move to oil.
Read more of Vaisala online monitors: Optimus™ DGA Monitor OPT100 and Moisture, Hydrogen and Temperature Transmitter MHT410.
Q: Is there any consistent correlation between the top oil temperature and moisture content of the oil? Migration of moisture between paper and oil relative to temperature?
A: The higher the temperature the more moisture migrates out of paper surfaces. However, the amount of moisture coming to oil depends on the moisture content of solid insulation. Characteristics of a specific transformer can be seen with longer time online moisture monitoring.
Q: What is a competitive advantage of Vaisala moisture sensors?
A: Good sensitivity in very dry oil and extremely good long-term stability. Also against degradation from by-products of oil.
Read a more detailed explanation in Vaisala HUMICAP® Sensor for Measuring Moisture in Oil.
Register here to THE webinar to SEE all the questions and answers.