Transformer oil plays a major role in insulation and heat dissipation and cooling in transformers, reactance transformers, mutual inductors and bushing. If the equipment produces electric arc, it plays an arc extinguishing role at the same time. It plays a major role in arc extinguishing and insulation in switching equipment. So, what are the advantages of transformer oil? Baoding zhongyi electric analysis of the functional advantages of transformer oil for you.

1. Functions and features of transformer oil:

1. Insulation function. In electrical equipment, transformer oil isolates live parts of different potentials from short circuits. Since the dielectric constant of air is 1.0 and that of transformer oil is 2.25, the insulation strength of transformer oil is much greater than that of air.

2. Cooling function. When the transformer is running on line, due to the resistance of the coil, the loss of magnetic corrosion and eddy current of the iron core, heat is bound to be generated, which must be distributed through the circulation of oil.

3. Arc extinguishing function. In switchgear, transformer oil plays the main role of arc extinguishing.

4. Protective function of insulating materials. Transformer oil is fluid and easy to fill into the gap of insulation material, so it can protect the coil assembly and iron core.Analysis of dissolved gas in transformer oil (mineral insulation oil)

1. The operational reliability of transformer oil filled into electrical equipment depends on some basic characteristic parameters of transformer oil, so the transformer oil itself must have good performance in chemical, physical and electrical aspects.

2. In terms of physical and chemical properties and electrical properties of transformer oil, naphthenic oil is significantly better than paraffin oil, which is reflected in the influence of a and carbon residues on insulation strength; B. Low temperature performance; C. Gas precipitation (paraffin based oil tends to precipitate H2 gas, while naphthenic oil absorbs H2 under the same conditions); D. difficulty in paraffin oil regeneration; E. various acids are easily formed from paraffin-based oils.

3. In transformer oil (mineral insulation oil), valuable gases for internal failure of oil-filled electrical equipment include oxygen H2, methane CH4, ethane C2H6, ethylene C2H4, acetylene C2H2, carbon monoxide CO, and carbon dioxide CO2; Total hydrocarbon refers to the sum of the characteristic gas contents of methane CH4, ethane C2H6, ethylene C2H4, and acetylene C2H2.

Sources of dissolved gas in transformer oil:

1. Decomposition of transformer oil itself. Transformer oil is a mixture of hydrocarbons with different molecular weights. Electrical and some thermal faults can break the c-h bond and c-c bond, and generate or recombine H2 and low-molecular hydrocarbon gases, such as methane CH4, ethane C2H6, ethylene C2H4, and acetylene C2H2. The oxidation of oil also generates CO and CO2.

2. Decomposition of solid insulation materials. Solid insulation refers to cellulose insulation, in which the c-o bond is higher than 105℃ when the polymer will crack, and higher than 300℃ will completely crack and carbonize.

3. Other sources of gas. Residual water in the oil reacts with iron to form H2. When the temperature is high and O2 is dissolved in the oil, the alkyd resin in the equipment may generate a large amount of H2 under the catalysis of some stainless steel. Or the catalytic reaction of stainless steel with oil will also produce H2 and so on.

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