Transformer oil is a molecule composed of a variety of different hydrocarbon mineral oil, according to the pour point is divided into 10, 25 and 45 of the three brands, which is widely used because of its insulation, heat transfer and arc suppression effect etc..
The oil quality test is also divided into physical, chemical and electrical performance tests. Chromatographic analysis is based on the analysis of dissolved gas content in the oil to determine whether the transformer has any faults and the nature and severity of the faults.
Its biggest advantage is that can be found in the first time equipment latent fault and development trends, to determine whether it can continue to run at the same time, to guide the maintenance to scientific and reasonable, which can maximize the economic benefits under the premise of ensuring safety, the chromatographic analysis has become the electrical performance supervision is a very important and effective detection means.
The normal operation of the transformer, the internal insulating oil and solid organic insulating material due to electric field, heat and oxygen effect will gradually aging decomposition, produce hydrogen, low molecular hydrocarbon gas and carbon monoxide, carbon dioxide and other gases, the first dissolve the oil, saturated after precipitation from oil.
When there is a fault inside the transformer, the above gas will be accelerated, and the gas content in the oil will also increase obviously.
The 1000mL brown bottle is usually used for the analysis of oil, and the sample of the syringe which is well sealed should be selected when the water and dissolved gas are analyzed. The oil sample should be able to represent the oil of the equipment, and should be avoided at the dead end of the oil cycle.
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