What Are The Reasons For The Low Insulation Of Dry-Type Transformers?

There are many reasons for the low insulation of dry-type transformer, and the following are some common reasons:

1. Environmental factors: The environmental conditions of the dry-type transformer have a great impact on its insulation performance. For example, harsh environments such as high temperature, high humidity, and corrosive gases can cause aging and damage to insulation materials, thereby reducing insulation performance.

2. Mechanical stress: dry-type transformer will be subjected to various mechanical stresses during operation, such as vibration, impact, etc. These stresses may cause cracks or damage to the insulating material, thereby reducing the insulation performance.

3. Electrical stress: dry-type transformers will generate electric and magnetic fields during operation, and these electromagnetic fields will generate electrical stress on insulating materials. Prolonged electrical stress may cause the performance of the insulating material to decline, thereby reducing the insulation performance.

4. Overload operation: The dry-type transformer is in the overload operation state for a long time, which will cause the temperature of the insulation material to rise and accelerate the aging process. In addition, overload operation may also lead to partial discharge of the insulation material, further reducing the insulation performance.

5. Manufacturing process problems: the insulation materials and structural design of dry transformers have a great impact on their insulation performance. If there are problems in the manufacturing process, such as the quality of the insulation material is unqualified, and the structural design is unreasonable, it may lead to the reduction of the insulation performance.

6, improper maintenance: dry transformer maintenance work also has a great impact on its insulation performance. Improper maintenance, such as incomplete cleaning and inspection, may cause surface contamination or damage to the insulation materials, thereby reducing the insulation performance.

7. External factors: External factors of dry transformers, such as lightning, crustal movement, etc., may also have an impact on its insulation performance. These external factors can cause the insulating material to produce transient high pressure or mechanical stress, resulting in reduced insulation performance.

In summary, there are many reasons for the low insulation of dry-type transformers, which need to be comprehensively considered and analyzed from many aspects. In order to ensure the safe operation of the dry transformer, it should be checked and maintained regularly to find and solve the problem of reduced insulation performance in time. At the same time, the design and manufacturing process of dry-type transformer should be strengthened to improve its insulation performance and anti-interference ability.