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Dry type transformer coil heating

Date of issue: 2020/8/3 9:38:28 Source: http://perryswenson.com Click: thirty-seven

   Dry type transformer is an important power equipment and electrical appliances, for dry-type transformer, dry-type transformer in the process of work also need to pay attention to the heat dissipation of dry-type transformer. Because the coil of dry-type transformer will heat up when it works and works. How should we deal with it when the coil of dry-type transformer is hot? Let's go to the editor of transformer manufacturer to understand the main treatment methods of coil heating of dry-type transformer

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 Transformer manufacturer

1. No load heating is due to the insulation failure of dry-type transformer or high input voltage of dry-type transformer. If the insulation is bad, the coil needs to be rewound. If the input voltage is high, the input voltage should be reduced or the number of coils should be increased. 2. If the voltage is normal, if the load is heated, the load is heavy, and the temperature can be reduced by reducing the load. Can not reduce the load, can use fan cooling.

3. If it is a small dry-type transformer, it is normal originally. Check the rectifier device and load. There may be short-circuit of rectifier tube and capacitor, and the current will increase and heat up.

4. In case of power dry-type transformer, the following standards and principles shall be adopted. The top oil temperature of national standard (oil immersed dry-type transformer) is generally adjusted at 85 ℃. If it exceeds 85 ℃, the reasons should be analyzed

1. If the room temperature is too high and the load is too heavy, the operation can continue to exceed 85 ℃, but the height should not exceed 95 ℃ (at this time, the central core or winding of dry-type transformer is 105 ℃, which will seriously damage the insulation, shorten the service life or burn the dry-type transformer);

2. When the dry-type transformer operates above 85 ℃, the temperature difference between the top oil temperature and the room temperature of the dry-type transformer shall not exceed 55 ℃. If the temperature exceeds, it may be seriously overloaded, the voltage is too low, the current is too large, and the internal fault may occur. If the dry-type transformer continues to operate, it will seriously damage the insulation, shorten the service life or burn the dry-type transformer.

The above is common dry-type transformer coil heating of the main treatment methods and specific treatment measures for your reference, for dry-type transformer coil heating you have any other questions and comments, please log in our website for detailed understanding and introduction!


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