WHITEPAPER: Presence, Effects, Measurement and Elimination of Moisture in Power Transformers Submerged in Mineral Oil - Spanish

(This article is in Spanish) Most experts in the industry agree that moisture in power transformers submerged in mineral oil is not desirable. However, the problem is how to determine the amount of moisture that is present in the system of the isolations and more specifically, in which part is within the complex structure of the isolations of the power transformers. For practical purposes, a transformer in operation is never in a condition of equilibrium with respect to the distribution of moisture, since moisture shifts from the oil to the insulations and vice versa depending on the temperature and the absorption characteristics of the humidity of each material, which makes it very difficult to use an equilibrium methodology where the humidity is measured in one medium to estimate the humidity in the other medium.