The invention relates to a high-safety oil-immersed type
transformer. The high-safety oil-immersed type
transformer comprises a
transformer main body and an explosion-proof tube, wherein one end of the explosion-proof tube is communicated with the transformer main body, and the other end of the explosion-proof tube is communicated with
atmosphere; the explosion-proof tube is internally provided with a first thin film, a second thin film, a first cavity, a second cavity, a third cavity and a fourth cavity; the first thin film and the second thin film are different in
compressive strength; aluminum
sulfate solution is contained in the first cavity and the third cavity, and
sodium bicarbonate solution is contained in the second cavity and the fourth cavity; when an
oil tank in the transformer main body is broken down, oil is cracked in high temperature to generate a large amount of gas, firstly the first thin film can be broken to reduce the pressure of the
oil tank, the second thin film also can be broken if the fault is severe, the aluminum
sulfate solution in the first cavity and the third cavity can flow out of gaps and flows into the second cavity or the fourth cavity along pipelines, the
sodium bicarbonate solution in the second cavity or the fourth cavity reacts with the
aluminium sulfate solution so as to play a role in fast cooling, and if a fire is generated, the effect of extinguishing the fire can be achieved.