What is the impact of the choice of insulation material on the performance of the Amorphous Alloy Dry Type Transformer?

Amorphous Alloy Dry Type Transformer plays an important role in the power system, and the choice of insulation material has a crucial impact on its performance.

First, the dielectric strength of the insulation material is directly related to the withstand voltage of the transformer. In a high-voltage electric field environment, a good insulation material can effectively prevent the breakdown between the internal windings and between the windings and the core. For example, epoxy resin is used as an insulation material. It has a high dielectric strength and can withstand high voltage without breakdown, ensuring that the transformer can operate safely under rated voltage and certain overvoltage conditions.

Second, the thermal conductivity of the insulation material affects the heat dissipation performance of the transformer. Amorphous alloy dry-type transformers generate heat during operation. If the thermal conductivity of the insulation material is poor, the heat is difficult to dissipate, resulting in an increase in the internal temperature of the transformer. Insulation materials with certain thermal conductivity, such as mica paper, can help heat transfer from the winding to the outer casing, and then dissipate it through air cooling or natural cooling, ensuring that the transformer operates within the normal operating temperature range and improving its operating efficiency and service life.

Furthermore, the hygroscopicity of the insulation material cannot be ignored. If the insulating material is easy to absorb moisture, its insulation performance will drop significantly in a humid environment. For example, some inferior insulating cardboard will absorb a lot of moisture in a humid environment, resulting in a decrease in its resistance, which may cause a short circuit fault. On the contrary, high-performance insulating materials such as polyimide film have extremely low moisture absorption rate and can maintain stable insulation performance even in a high humidity environment, ensuring the reliable operation of the transformer.
In addition, the mechanical strength of the insulating material has a certain impact on the transformer's ability to resist short circuits. When the transformer is subjected to a short circuit shock, the winding will be subjected to a huge electromagnetic force. If the mechanical strength of the insulating material is not enough, it may cause problems such as winding deformation and insulation damage. The use of glass fiber reinforced insulating materials can enhance the mechanical stability of the winding and improve the transformer's tolerance to short circuit faults.
The aging resistance of the insulating material also determines the long-term reliability of the transformer. During the long-term operation of the transformer, the insulating material will gradually age due to the influence of various factors such as electrical, thermal, and mechanical stress. Selecting insulating materials with good aging resistance, such as fluororubber, can slow down the speed of insulation aging, ensure that the transformer can operate stably within its design life, and reduce maintenance costs and power outage time.