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What does it all mean?


Once offered exclusively to electric utilities and power producers internationally, NTT now offers to the industrial market the same, high-quality insulating fluid analysis
Industrial Benchmarking

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 transformer.

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.

Interfacial Tension
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.

Acid Number
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.

Color\Visual Examination
A general screening test for fluids to indicate degradation, contamination and presence of sediment.

Dielectric Strength
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.

Power Factor
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.

What does it all mean?

Insulating liquids used in transformers, circuit breakers, and high-voltage bushings require proper testing and maintenance to keep then in good condition. Liquid insulation that is not in good condition may cause damage to equipment and become a hazard to personnel.

Gas-in-oil analysis of mineral oil can provide early detection of developing problems. If accurate information on the condition of mineral oil is available as the oil slowly deteriorates, it is possible to predict when the oil will reach the danger zone, and the most convenient time can be chosen for remedial measures to be taken.

Complete Analysis Package Includes:
Complete instructions on sampling procedures and technique
DGA and PCE sampling containers
Gas-in-oil and Oil quality Analysis
DGA\PCE reports mailed or faxed
Interpretation of Analysis data
Establishment of acceptance operational limits
Maintenance interval recommendations
Historial Tracking of analysis data
Access to further forensic laboratory analyses

Typical problems detected through analysis:
Arcing, sludging, overheating, loss of dielectric strength, cellulose degradation, contamination

Ask your electrical maintenance contractor on how best to utilize these services.Or call us on how to get youself started.