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A preliminary understanding of dry-type transformers

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A preliminary understanding of dry-type transformers

2025-01-23

A dry-type transformer is a transformer without oil medium, and its insulating medium is air or other dry gas. This type of transformer is widely used in power systems and is favored for its unique advantages. The following is a detailed introduction to dry-type transformers:

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  1. Principle and structure

 

The working principle of a dry-type transformer is based on Faraday's law of electromagnetic induction. It uses an AC electromagnetic field to generate an electromotive force in a coil, thereby achieving voltage rise and fall. Its structure mainly includes three parts: iron core, winding and shell. The iron core is an important heat transfer component in a dry-type transformer, and it also plays a role in supporting the winding. The winding consists of a high-voltage winding, a low-voltage winding and a neutral winding, which respectively undertake the functions of voltage rise and fall, power transmission and protection. The shell is used to support the iron core and winding, and plays a protective role.

 

  1. Features and advantages

High reliability: Dry-type transformers use advanced production technology and high-quality materials, have high mechanical strength and short-circuit resistance, good thermal stability, high reliability and long service life.

Energy saving and environmental protection: Compared with oil-immersed transformers, dry-type transformers do not require oil immersion, thus avoiding safety hazards such as oil leakage and fire. At the same time, its low loss and low noise characteristics make the energy saving effect significant, environmentally friendly and pollution-free.

Easy installation and maintenance: dry-type transformers are small in size, light in weight, and have low installation costs. And because of their compact structure and no oil pollution, they are also more convenient to maintain.

Strong adaptability: dry-type transformers can be equipped with shells of different protection levels to adapt to different use environments. At the same time, they have good moisture resistance and can operate stably in harsh environments such as high temperature and humidity.

High degree of intelligence: modern dry-type transformers can be equipped with a complete temperature protection system, using an intelligent signal temperature control system, which can automatically detect and display their respective operating temperatures, and have automatic start and stop of fans, as well as alarm, evacuation and other function settings.

  1. Application fields

 

Dry-type transformers have a wide range of applications, including power systems, industry, construction, commerce, and IT industries, wind power and solar power generation systems, railway transportation systems, medical equipment and other fields. In power systems, dry-type transformers can be used in the distribution transformer system of transmission and distribution stations to ensure the stability and reliability of power supply. In the industrial field, dry-type transformers provide stable and reliable power supply for various equipment and machines. In construction and commercial use, dry-type transformers are used to build stable and efficient power transmission and distribution systems. In addition, dry-type transformers also play an important role in the IT industry, wind power and solar power generation systems, railway transportation systems, and medical equipment.

 

  1. Purchase recommendations

 

When purchasing dry-type transformers, the following factors should be considered:

 

Temperature control system: The reliability of the temperature control system determines the safe operation and service life of the transformer. Therefore, when purchasing, attention should be paid to parameters such as the temperature of the fan automatic control, the over-temperature alarm and trip temperature, and the maximum display temperature of the temperature display system.

Protection method: The reliability of the protective shell is also an important factor to consider when purchasing. The material and structure of the shell and whether it will affect the cooling capacity of the transformer need to be carefully examined.

Overload capacity: The overload capacity of the dry-type transformer is a safety guarantee during use. Therefore, products with reliable overload capacity should be selected when purchasing.

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In summary, dry-type transformers have been widely used in power systems with their high reliability, energy saving and environmental protection, convenient installation and maintenance, strong adaptability, and high degree of intelligence. When purchasing, you should consider factors such as temperature control system, protection method and overload capacity to ensure that you choose the right product.