What is transformer furan test?
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 are furans in oil?
Furan derivatives are a measure of the degradation of the insulation paper.
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.
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 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.
Is furan an aromatic compound?
Furan and Furan-Related Compounds. Furan is an aromatic compound with the participation of the oxygen lone pair in the π-electron system to satisfy Hückel’s rule, 4n + 2 (n = 1) electrons. The compound is stable to heating up to about 550°C (depending also on heating time).
What is DP in transformer?
DP means distribution panel in a power supply system. DP in the power supply system is different from the transformer, which can be called by different names according to construction, voltages, applications, cooling methods, etc.
What is DGA test of transformer?
Dissolved gas analysis (DGA) is an examination of electrical transformer oil contaminants. Insulating materials within electrical equipment liberate gases as they slowly break down over time. DGA usually consists of sampling the oil and sending the sample to a laboratory for analysis.
How does cooking oil get oxidized?
When a cooking oil is exposed to heat, light and oxygen, it can oxidize. Oxidized oils can produce harmful compounds and toxic by-products and make your food taste bad. A greater induction time indicates an oil is more resistant to oxidation, a shorter induction time means the oil will oxidize easily.
Why is oxidized oil bad?
But a number of experiments that fed oxidized vegetable oils to animals showed they can cause damage to brain cells, lead to inflammation, and increase the risk of diabetes and cardiovascular disease. If these results hold true in humans, regularly eating oxidized oils could be a threat to our health.
What is furan content?
Is furan an ether?
Furan is a heterocyclic organic compound, consisting of a five-membered aromatic ring with four carbon atoms and one oxygen atom. It is soluble in common organic solvents, including alcohol, ether, and acetone, and is slightly soluble in water. Its odor is “strong, ethereal; chloroform-like”.
How much furan and Dicy are in an oil?
New oil spiked with 1,000 mg/mL of each of five furan compounds and 100 mg/mL of dicy. All of these samples were sparged with nitrogen in valved, stainless-steel cylinders for 20 minutes and then sealed under nitrogen. No information on type of oil used was given.
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.
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].
Is there any relation between DP and furan content in Transformers?
Many authors including Chendong.I, have reported the empirical relations relating furan content with DP. These empirical relations are finding application in estimating the consumed life of the transformer. We are doing extensive DP and furan analyses for remnant life assessment of transformers.