What is furan analysis of transformer oil?

What is furan analysis of transformer oil?

Furan test is used to determine the life of a transformer and condition of transformer oil in transformer oil. By the Furan analysis, we check the condition of paper in transformer oil. Furan measures the degradation of cellulose paper. The degradation materials produce CO and CO2 gases.

What test are performed for testing of transformer oil?

The most important test that can be done on the liquid insulation of a transformer is an annual Dissolved Gas Analysis (DGA). This test can give an early indication of abnormal behavior of the transformer. As the name implies, this test analyzes the type and quantity of gases that are dissolved in the transformer oil.

What is furan content?

Furan analysis shows the condition of the paper insulation with an oil sample. Over time, the cellulose insulating material will experience degradation. An aromatic compound is produced during this degradation called furan.

What are furans transformer?

This is usually done in transformers aging above 15 years.Furan indicates the compounds of carbon and hydrogen.When the furan count is above 2500ppb, it means the transformer is about to fail.Furan Analysis is important in deciding when to discard a transformer unit or retain.

What do oxidation inhibitors do?

Most mineral oil dielectric fluids contain an added oxidation inhibitor which is a chemical additive that acts as a preservative. The purpose of the inhibitor is to prevent oxygen from reacting with the oil, thus slowing the aging rate of the oil (and also of the solid insulation).

What is the need for transformer testing?

The need for transformer testing is to check the functioning of the transformer and to decrease the chance of failure. All electrical equipment needs to be maintained safely from some of the failures. Transformer failure can happen because of electrical, thermal, or mechanical factors.

What is transformer insulation resistance test?

Insulation Resistance Test or Megger Test of Transformer: Insulation resistance is the ratio of applied voltage to the resulting current at a specified time after the voltage is applied. This test is carried out to ensure the healthiness of overall insulation system of an electrical power transformer.

What is DGA of transformer oil?

Dissolved gas analysis (DGA) is an examination of electrical transformer oil contaminants. The composition and distribution of these dissolved gases are indicators of the effects of deterioration, such as pyrolysis or partial discharge, and the rate of gas generation indicates the severity.

What is degree of polymerization in transformer insulating oil?

The degree of polymerization test is done in order to measure precisely the degradation of the paper insulation used in the transformer. Cellulose, which is used as solid transformer insulation, is a linear polymer molecule consisting of hundreds of glucose units.

Can a transformer problem be detected without a furan analysis?

Results from the dissolved gas analysis sample, however, did not reveal any irregularities with the transformer. There was no significant increase in any of the gases that would typically confirm a problem. Without the furan analysis, therefore, the problem might have gone undetected until there was a catastrophic in-service failure.

What is transtransformer oil testing?

Transformer Oil Testing is a proven loss prevention technique which should be a part of any condition-. The “screen test” is a collection of physical, electrical and chemical tests for the transformer oil.

What is the history of furans in Transformers?

The research on furans in transformers started in the 1980s. hyde, 2-acetylfuran, 5-methyl-2-furaldehyde, and 2-furfurol. between the paper and the insulating oil. As a result, their con- mance liquid chromatography. large volume of publications. The ke y points that promoted this when insulation paper degrades [2], [3].

What is furan testing and why is it performed?

Testing is performed for five furans: • 5M2F (5-methyl – 2-furaldehyde)—local, severe overheat. Furan results are used to determine an average expected degree of polymerization for the paper in the equipment.