Cast resin dry type transformer is a special type of power transformer, which plays a vital role in the power system. Different from the traditional oil-immersed transformer, the cast resin dry type transformer does not use insulating oil as the insulating medium, but uses solid insulating materials such as epoxy resin to encapsulate the winding and core, thus achieving oil-free, safe and environmentally friendly operation.
Structure and composition
The structure of the cast resin dry type transformer is relatively simple, but the internal components are very precise. It is mainly composed of iron core, winding, insulation material and shell.
The iron core is the core component of the transformer, which is made of high-quality silicon steel sheets. Silicon steel sheets have low loss and high magnetic conductivity, which can effectively reduce iron loss and magnetic noise.
Windings are key components of transformers for voltage conversion and energy transfer. In cast resin dry type transformers, windings are usually wound with copper foil or enameled wire and impregnated with solid insulating materials such as epoxy resin. This design not only improves the insulation performance of the windings, but also enhances their mechanical strength and seismic resistance.
Insulation materials are an important part of cast resin dry type transformers. It is mainly composed of high-strength and high-insulation materials such as epoxy resin and glass fiber. These materials are closely combined with the windings and core through the casting process to form a solid insulation layer to ensure electrical safety.
The shell is a key component that protects the internal components of the transformer from external damage and electric shock to personnel. It is usually made of materials such as steel plates or aluminum alloys, and has sufficient strength and rigidity. The shell is also equipped with heat dissipation holes and ventilation devices to ensure that the transformer can effectively dissipate heat during operation.
Working principle of cast resin dry type transformer
The cast resin dry type transformer is an oil-free, fully enclosed power equipment. Its internal structure is composed of high-temperature silicone rubber insulation material and high-efficiency radiator. Its working principle is to convert the electric energy on the high-voltage side into the electric energy on the low-voltage side through the transformation of the iron core and the coil, so as to meet the power demand under different voltage levels.
Compared with traditional oil-immersed transformers, cast resin dry type transformers have higher reliability and safety. Because it uses resin casting technology, the inside of the transformer is not affected by the external environment, and there will be no safety accidents due to internal oil leakage and other reasons. In addition, the cast resin dry type transformer uses materials with better heat dissipation performance, which can effectively reduce the temperature and reduce the possibility of overheating.
Features and Advantages
Low loss and high efficiency: The cast resin dry type transformer adopts high-quality silicon steel sheets and copper foil windings, as well as an optimized design structure. This makes the no-load loss and load loss of the transformer low. At the same time, due to the good thermal conductivity of solid insulating materials, it helps to dissipate heat and reduce temperature rise, thereby improving the operating efficiency of the transformer.
Safe and environmentally friendly: Since solid insulating materials are used as insulating media, cast resin dry type transformers do not need to use insulating oil. This avoids safety hazards such as oil leakage and fire, and also reduces pollution to the environment. In addition, solid insulating materials have the characteristics of flame retardancy and self-extinguishing, which further improves the safety of the transformer.
Easy maintenance: Since cast resin dry type transformers use solid insulating materials as insulating media, there is no need for oil replacement and inspection. This greatly reduces the maintenance cost of the transformer. At the same time, solid insulating materials have good stability and are not easy to age and deteriorate, so the service life of the transformer is also longer.
Moisture-proof and shock-proof: The key components such as the windings and cores of cast resin dry type transformers are tightly packaged together by solid insulating materials. This design makes the transformer have good moisture-proof and shock-proof properties. Even in a humid or vibrating environment, the transformer can maintain stable operating performance.
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