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details Transformer oil is a kind of mineral oil obtained by steam distillation and refining in the oil. It is a pure and stable liquid with low viscosity, good insulation and good refrigeration obtained by making the lubricating oil distillate with strong acid and alkali...A compound of nitrogen oxides。Alias square shed oil, light yellow transparent liquid。
(1) Insulation efficacy: transformer oil has a much higher insulation compressive strength than gas。The insulating raw material is immersed in oil, which can not only improve the compressive strength of the insulation, but also avoid the corrosion of moisture。
(2) heat removal efficiency: the constant pressure of transformer oil is larger than heat, and it is commonly used as coolant。The heat generated by the transformer operation causes the oil close to the transformer core and wound to be heated and deformed. According to the heat convection between the left and right of the oil, the heat generated is dispersed according to the heat pipe radiator to ensure the normal operation of the transformer。
(3) arc elimination effect: On the on-load transformer power switch of the oil isolation switch and transformer, the circuit breaker will cause electrical isolation when it is converted。Because the transformer oil has good heat transfer performance, and it will touch a lot of steam under the high temperature effect of the electric isolation, causing a lot of working pressure, and then improve the magnetic blowing characteristics of the material, so that the electric isolation is quickly extinguished。
The characteristics of transformer oil generally have the following provisions：
(1) The relative density of transformer oil is as small as possible, which is easy to settle the water in the oil and the residue。
(2) The viscosity should be moderate, too alternating will harm the heat convection heat removal, and too small will reduce the opening flash point。
(3) The opening flash point should be as high as possible, generally not less than 136 ° C。
(4) The freezing point should be as low as possible。
(5) The lower the residue composition of acid, alkali, sulfur, ash and so on, the better to minimize their erosion of insulating raw materials, power lines, fuel tanks, etc。
(6) The air oxidation level should not be too high。The air oxidation level is generally indicated by the peroxide number, which refers to the amount of ferric chloride solution (mg) required to digest and absorb the dispersed acid in 1 gram of oil.。
(7) The stability can not be too low, the stability is generally shown by the precipitation of the peroxide value experiment, which means that the working ability of the oil aging resistance。
功效
1, the oil in the transformer is the key to heat and cooling effect during operation;
2, insulation and insulation maintenance effect on winding (maintain stable insulation);
3, transformer oil at the high voltage wire and tap power switch point contact arc elimination effect, to avoid corona discharge and arc charge discharge caused by;
4. Transformer oil is commonly used as a liquid seal in hydraulic protection valves。
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