Initiation of oil oxidation in electrical insulating oils is
most important to monitor in power transformer equipment,
because it indicates that the oil can be expected to
abruptly degrade thereafter. In this work, results obtained
using a newly developed FER sensor result were compared
with the results obtained by other measurement methods
to determine whether the FER could be used to provide an
effective method to monitor oxidation of electrical insulating
oils. It was found that the measured FER parameter
could be used to analyze the oil oxidation in a simple
and effective manner.
Results also showed that the newly developed apparatus
used for measuring the FER parameters had better sensitivity
in quantitatively evaluating the electrical
insulating oil oxidation. Therefore, it is expected that the
developed device could be used as a cost-effective and
reliable, continuous monitoring tool for electrical insulating
oils in an on-line application.