Electromagnetic iron removers are divided into air cooling, oil cooling, heat pipe cooling, self cooling, etc. according to the cooling method. The iron removal effect mainly depends on the magnetic performance parameters of the iron remover, which is proportional to the Magnetic flux density and the magnetic field gradient. The advantages of heat pipe cooling are good thermal conductivity and high heat exchange efficiency of the heat pipe itself; The disadvantage is that the heat pipe is in line contact with the winding (the shape of the heat pipe is circular), requiring a large amount of insulation material to be filled, occupying the effective volume of the winding, thereby affecting heat transfer and reducing the overall heat transfer efficiency. The advantages of oil cooling are good sealing, good cooling effect, low temperature rise, small difference in magnetic properties between cold and hot states, and low cost; The disadvantage is that there is a high requirement for heat transfer oil (the temperature rise of the iron separator is higher than that of ordinary oil cooled transformers), which requires regular replacement by users. Otherwise, insulation may be damaged due to the deterioration of the heat transfer oil.
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