Catch and track faults within your transformer
or switch gear BEFORE they become a real and costly problem.
DGA - Dissolved Gas Analysis
The accepted, non-intrusive method for evaluating
the operation of a transformer. Properly used laboratory data can give the earliest
possible notice of incipient faults, give information on past operational problems,
indicate whether corona, mild or severe overheating problems, or arcing has occured in the
An effective test for evaluating the in-service condition
of dielectric fluids as well as in acceptance testing. Low moisture is desirable because
water adversely affects the electrical properties of insulating fluids, weakens the cellulose
insulation, and is difficult or impossible to remove once in the transformer.
Indicates the sludging characteristics of transformer
insulating oil. Sludging interferes with the heat transfer in equipment and with the ability
of the oil to quench an arc. Low IFT values combined with low acid number may also indicate
the presence of contaminants such as soaps, varnishes and paints.
Directly measures the amount of acidic material present in the oil. As the oil ages
in service, the oil oxidizes. As the oil oxidizes it increases in acidity. The ultimate
product of oxidation is sludge. An acid number of 0.4 or higher indicates that sludge has
begun to form or will soon form.
A general screening test for fluids to indicate degradation,
contamination and presence of sediment.
Gives an indication of
the ability of the fluid to withstand a dielectric breakdown. A low value may indicate the
presence of contaminants such as water, dirt, moist fibers of cellulose, or other conducting
particles in the fluid.
This is a measure of the dielectric losses
in an electrical insulating liquid when used in an alternating electric fluid and of the
energy dissipated as heat. Low dissipation factor values indicates low dielectric losses.
May be useful as a means of quality control and as an indication of changes in quality
resulting from contamination and deterioration in service of as a result of handling.