English
As one of the reliable and fast growing manufacturers in China, Suzhou Hanyao has been supplying electrical insulation materials on dry type transformers for years. The insulation system of dry-type transformers is usually classified according to the heat resistance rating of the insulation materials used and the manufacturing process. Dry-type transformers rely entirely on solid insulating materials and gas (air) as the insulating and heat dissipation medium. Their core characteristics are oil-free operation, fire resistance, environmental friendliness, and ease of maintenance.Therefore, it has strict requirements on the heat resistance and flame retardant properties of insulating materials.
First, the heat resistance performance must meet the requirements, because dry-type transformers mainly rely on solid insulation materials and air as insulation and heat dissipation media,Most of them need to withstand temperatures of 155℃, 180℃, or even 220℃.
Secondly, considering the high temperatures generated during transformer operation, for safety reasons, the flame retardancy of the insulation material must be given full attention.Finally, some materials release harmful substances when heated. For environmental reasons, relatively environmentally friendly materials should be selected based on the application scenario.
In conclusion, the selection of insulation materials for dry-type transformers is closely tied to their manufacturing process. Users should comprehensively select the most suitable type based on their application environment, load characteristics, fire protection requirements, budget, and total life cycle cost.
The most commonly used electrical insulation materials on dry type transformers are epoxy resin prepreg DMD, FRP dog bone spacer stick, electrical insulation laminated polyester film etc. Apart from this, we can also provide materials with different compositions and properties according to customer needs. In short, there is a wide variety of insulation materials for dry-type transformers, and the appropriate product needs to be selected based on factors such as different heat resistance levels and application scenarios.
