transformers age, gaseous and liquid contaminants
become dissolved in the dielectric fluid
and can lead to failures or shortened
useful lives unless detected and treated
early. Sampling and analysis of dielectric
fluid is the cornerstone of transformer
preventive maintenance. Transformer oil
is sampled at least annually and analyzed
using gas chromatographs, spectrometers,
and other sophisticated test equipment.
The results of these tests show the types
and amounts of contaminants in the oil
and how they have changed from year to
year. The contaminants occur as a result
of aging, overheating, leaks or other
complete visual inspection of the transformer
is performed at the time the samples are
drawn. Leaks, inoperative gauges, cracked
bushings, low oil level and other defects
are identified and described. Nameplate and other operational data
is recorded to assist in developing maintenance recommendations.
A transformer engineer reviews the sample test results and inspection
prior history, the usage and age of the
transformer, IEEE Standards and prepares
a complete report and trend analysis of
the sample results, visual inspection
and maintenance recommendations that is
sent to the customer.
View our online reporting system Demo
to see sample test report
(a new window will open)
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