Transformer oil is an important component of the oil-immersed transformer, which has the function of insulation, heat dissipation and arc suppression. In the operation of the baoding oil immersed transformer, sometimes its oil temperature rise higher than the permissible limit. So how do you solve this problem? What is the reason for the high temperature of oil immersed transformer? In this paper, the supplier of baoding oil-immersed transformer is briefly analyzed for its reasons for reference.
When it is found that the oil temperature is too high, the load size of the transformer and the temperature of the cooling oil should be checked in time. At the same time, compared with the previous temperature, check whether the thermometer itself failed. If these tests are normal, the oil temperature of the transformer is higher than in the past, and it may be that there is a failure in the transformer. There are several problems that can lead to the rise of oil temperature in baoding oil-immersed transformer.
1. Poor contact with tap switch.
In the transformer operation, if the contact point of the tapping switch is not enough or the contact is defiled, the contact resistance will increase, resulting in the temperature rise of the contact point and heating; If it is easy to make the tap switch contact with bad and hot, the transformer oil temperature is too high. Determining whether the tapping switch is not in contact can be determined by measuring the dc resistance of the coil.
2. Short circuit between turns of the coil.
In the internal structure of the transformer, if the insulation of several adjacent coil turns is damaged, the short circuit current will appear between them, and the short circuit current will cause the oil temperature to rise rapidly.
For transformer equipment, there are many reasons for coil insulation damage, including external force, high temperature, manufacturing process and so on. Determine whether the coil turns short or not, and can be determined by measuring the dc resistance of the coil and taking the oil sample assay.
3. Short circuit between iron core silicon steel sheet.
Because the transformer is damaged by external forces or the aging of insulation, it can cause short circuit, which can cause the core eddy current loss to increase and local overheating. In addition, the wearing of the screw insulation can also cause eddy current.
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Company's main products: baoding dry type transformer, baoding box transformer, baoding oil immersed transformer, baoding high and low voltage complete equipment. I companies to follow "detail decides success or failure, honesty molded the future" of the enterprise purpose, adhere to "quality measuring market, seek development by innovation, to management for efficiency" business philosophy, to make my company's products are widely used in power plant, chemical, construction, mining, metallurgy, rail transportation and other industries, to meet the needs of various users, my company rely on superior product quality, thoughtful service, won the trust of our customers.
