Dry-type transformer is an important power equipment, and its technical parameters have a decisive impact on its performance and use effect. The following will elaborate on the main technical parameters of dry-type transformers, including but not limited to rated capacity, rated voltage, conversion ratio, short-circuit impedance, efficiency, temperature rise, insulation grade, cooling method, winding form and number of turns, etc.

First of all, rated capacity is a key parameter of a dry-type transformer, which refers to the maximum capacity that the transformer can withstand, usually measured in kilowatts (kVA). The determination of the rated capacity needs to be carried out according to the needs of the actual application scenario to ensure the stable and safe operation of the transformer.

Secondly, the rated voltage is the standard value of the input and output voltage of the dry-type transformer during normal operation, measured in kilovolts (kV). The selection of the rated voltage needs to take into account the voltage level of the power system and the conditions of use of the transformer to ensure its proper operation and protect the equipment from damage.

The transformation ratio, also known as the voltage ratio, refers to the ratio of the voltage on the high side to the voltage on the low side of a dry-type transformer. This parameter reflects the transformer’s ability to adjust the voltage, which is of great significance for achieving voltage stabilization and conversion.

Short-circuit impedance is the performance parameter of a dry-type transformer under short-circuit conditions, which indicates the impedance value generated by the current on the low-voltage side when the voltage on the high-side decreases to a certain percentage of the rated voltage in the case of a short-circuit condition. The size of the short-circuit impedance can reflect the ability of the transformer to withstand the impact of the short-circuit current, which is an important index to evaluate the electrical performance and safety of the transformer.

Efficiency is another important parameter of a dry-type transformer, which represents the ratio of the transformer’s output power to the input power, usually expressed as a percentage. High efficiency means that the transformer loses less energy during the energy conversion process, which is beneficial to improve the economy of the entire power system.

Temperature rise is the temperature rise caused by the heat generated by a dry-type transformer during operation, usually expressed in degrees Celsius (°C). The control of temperature rise is essential to ensure the stable operation and prolong the service life of the transformer.

In addition, parameters such as insulation grade, cooling method, winding form and turn count of dry-type transformer are also important factors affecting its performance. The insulation grade determines the electrical strength and safety of the transformer, the cooling method affects the heat dissipation effect and operating temperature of the transformer, and the winding form and turns determine the electrical performance and structural characteristics of the transformer.

Dry-type transformers have many advantages over oil-immersed transformers, such as no oil pollution, good fire performance, and easy maintenance. This makes dry-type transformers widely used in power systems, especially in places with high requirements for environmental protection and safety.

When selecting and using dry-type transformers, it is necessary to comprehensively consider the above technical parameters, and make a reasonable choice according to the actual needs and conditions. At the same time, it is also necessary to pay attention to the installation and operating conditions of the transformer to ensure that it can perform at its best.

To sum up, the technical parameters of dry-type transformers are an important basis for evaluating their performance and use effects. By understanding and mastering these parameters, we can better select and use dry-type transformers, which provide a strong guarantee for the stable operation of the power system and the protection of power equipment. For more detailed information, it is advisable to consult specialized books or consult experts in the relevant field.